Transfer Learning With Spinally Shared Layers, 2024 Missouri University of Science and Technology
Transfer Learning With Spinally Shared Layers, H. M.Dipu Kabir, Subrota Kumar Mondal, Syed Bahauddin Alam, U. Rajendra Acharya
Nuclear Engineering and Radiation Science Faculty Research & Creative Works
Transfer-learned models have achieved promising performance in numerous fields. However, high-performing transfer-learned models contain a large number of parameters. In this paper, we propose a transfer learning approach with parameter reduction and potential high performance. Although the high performance depends on the nature of the dataset, we ensure the parameter reduction. In the proposed SpinalNet shared parameters, all intermediate-split-incoming parameters except the first-intermediate-split contain a shared value. Therefore, the SpinalNet shared parameters network contains three parameter groups: (1) first input-split to intermediate-split parameters, (2) shared intermediate-split-incoming parameters, and (3) intermediate-split-to-output-split parameters. The total number of parameters becomes lower than the …
Prompt Vs Local Redeposition: Model Refinement And Experimental Design For Understanding High-Z Net Erosion In Magnetic Confinement Fusion, 2024 University of Tennessee, Knoxville
Prompt Vs Local Redeposition: Model Refinement And Experimental Design For Understanding High-Z Net Erosion In Magnetic Confinement Fusion, Davis C. Easley
Doctoral Dissertations
The economic and engineering success of magnetic confinement fusion reactors significantly depends upon the optimization of plasma facing component (PFC) design. For high-Z PFCs, the critical engineering condition is minimal net erosion (i.e. gross erosion – redeposition). Here, we present a high-Z net erosion model discriminating three primary redeposition mechanisms: prompt (geometric-driven), local (sheath-driven), and far (scrape-off-layer-driven). Using these distinctions, we show modeling for high-Z net erosion in magnetic-confinement fusion over a matrix of key plasma parameters. With Sobol’ methods we assess the sensitivity of each mechanism and show that prompt-vs-local trade-off critically explains underprediction in redeposition losses of up …
Meteorological Data Mining And Synthesis For Supplementing On-Site Data For Regulatory Compliance, 2024 Missouri University of Science and Technology
Meteorological Data Mining And Synthesis For Supplementing On-Site Data For Regulatory Compliance, Ben Sonpon, Shoaib Usman, Joseph Smith, Sarah Kovaleski, Jason Wibbenmeyer
Nuclear Engineering and Radiation Science Faculty Research & Creative Works
Many regulatory requirements add significant delay in the licensing of new nuclear power stations. One area of particular interest is the environmental impact of potential atmospheric release. The purpose of this research is to demonstrate effectiveness of meteorological data mining and synthesis from offsite locations to reduce need for onsite data, hence allowing rapid licensing. The automated procedures tested for data mining and extraction of meteorological data from multiple offsite sources and the data analytic tool developed for data fusion are presented here. Three important meteorological parameters from regulatory compliance are considered for this analysis: wind velocity, wind direction, and …
Extraction Of Neutron-Gamma Irradiated Diffusion Pump Oils, 2024 Clemson University
Extraction Of Neutron-Gamma Irradiated Diffusion Pump Oils, Cooper L. Tillman
All Theses
This work successfully demonstrates solvent extraction methods for separation of oil from the by-products when two commercially available vacuum pump oils were exposed to an intense neutron and gamma-ray radiation environment. Nuclear fusion power at a commercial scale has accelerated the need for radiation resistant vacuum technology, such as oil-based diffusion pumps. Polyphenyl ether and aromatic silicone oils were irradiated at the Rhode Island Nuclear Science Center (RINSC) up to MGy absorbed doses with neutron and gamma-ray radiation. Solvent extractions were performed using hexane and isopropanol to characterize the oil extraction as a function of total absorbed dose. The by-products …
Differential Die-Away Analysis To Detect The Presence Of Nuclear Material In Cargo, 2024 University of Tennessee, Knoxville
Differential Die-Away Analysis To Detect The Presence Of Nuclear Material In Cargo, Sophia C. Hitson
Masters Theses
Cargo scanning plays an essential role in the Department of Homeland Security's national security strategy. The improvement of nuclear and radiological material detection is imperative to maintain a strong defense against the smuggling of illicit materials. The University of Tennessee has developed a cargo container scanning system using differential die-away analysis to indicate the presence of shielded fissile material.
In preparation for measurements to be conducted at the Y-12 National Security Complex, our initial experimental setup uses natural uranium as simulated contraband within the cargo container. The container can be filled with hydrogenous materials, such as wood or paper, or …
Notes For Contributors, 2024 University of Nebraska at Omaha
Waging Peace On The Final Frontier 64th Academy Assembly Proceedings, 2024 United States Air Force Academy
Waging Peace On The Final Frontier 64th Academy Assembly Proceedings, Space And Defense, Madison Walker
Space and Defense
In October 2022, the 64th annual Academy Assembly at the U.S. Air Force Academy took up the theme of “Waging Peace on the Final Frontier.” The following are proceedings of roundtables held by select undergraduates from around the country on questions of space policy & strategy.
Revitalizing America's Low-Yield Deterrent, 2024 United States Air Force Academy
Revitalizing America's Low-Yield Deterrent, Alex Kleitz
Space and Defense
An array of low-yield weapons will play a vital role in integrated deterrence. *The following essay, submitted in June 2022, earned the Junior Division USSTRATCOM General Larry D. Welch Deterrence Writing Award.
The Unified Command Plan For A New Cold War, 2024 United States Air Force Academy
The Unified Command Plan For A New Cold War, David Stilwell
Space and Defense
No abstract provided.
Editor's Note, 2024 University of Nebraska at Omaha
Table Of Contents, 2024 University of Nebraska at Omaha
Front Matter, 2024 University of Nebraska at Omaha
Space And Defense Volume 15 No. 1 Spring 2024 (Whole Issue), 2024 University of Nebraska at Omaha
Space And Defense Volume 15 No. 1 Spring 2024 (Whole Issue), Space And Defense
Space and Defense
No abstract provided.
Coupled Monte Carlo And Adjoint Depletion Sensitivity Coefficient Methods, 2024 University of New Mexico
Coupled Monte Carlo And Adjoint Depletion Sensitivity Coefficient Methods, Benjamin R. Murphy
Nuclear Engineering ETDs
Recent advances in adjoint-based, continuous-energy Monte Carlo generalized perturbation theory (GPT) sensitivity coefficients are combined with adjoint-based depletion perturbation theory (DPT) sensitivities to obtain fully coupled depletion sensitivity coefficients in OpenMC. These depletion sensitivity coefficients are compared with direct perturbation results and found to have generally good agreement, though discrepancies exist. Some shortfalls of the DPT method include the inefficient initial numeric integration scheme for calculating the DPT sensitivities and the lack of stochastic uncertainty estimates for the DPT sensitivities. However, despite these shortcomings, the methodology provides the means to obtain high fidelity depletion sensitivity coefficients. With refinements to the …
Thermal Hydraulic Analysis For Different Subchannels Of Generic Vver-1200, 2024 Military Institute of Science and Technology, Bangladesh
Thermal Hydraulic Analysis For Different Subchannels Of Generic Vver-1200, Mosaddak Ahamed Zahid, Md. Imam Mehedi, Shamsul Arefin Shibly, A. S. Mollah
International Journal of Nuclear Security
The demand for nuclear energy is steadily increasing all over the world. Most nuclear power is used for peaceful applications such as power generation, healthcare, agriculture, food security, industry, and research. One of the primary applications of nuclear energy is the generation of electricity through nuclear power plants based on nuclear reactors. Many developing countries around the world (such as Bangladesh) are moving toward nuclear power plants because they have huge advantages, including low-cost energy, reliable energy sources, zero carbon emissions, and high energy concentration. As a result, the demand for nuclear reactor protection and operational protection of nuclear power …
Valorization Of Spent Zn-C Battery And Construction And Demolition Waste (Cdw): Fabrication And Characterization Of Geopolymer Composites For Radiation Shielding Applications, 2024 Missouri University of Science and Technology
Valorization Of Spent Zn-C Battery And Construction And Demolition Waste (Cdw): Fabrication And Characterization Of Geopolymer Composites For Radiation Shielding Applications, Raul Florez, Carlos H. Castano Giraldo, Sandra M. Restrepo-Arcila, Henry A. Colorado
Nuclear Engineering and Radiation Science Faculty Research & Creative Works
There is a Serious Threat of Pollution Due to the High Waste of Energy and Materials Worldwide that Needs to Be Decreased. One Way is to Reduce Waste or Use Them in Secondary Processes. New Eco-Friendly Geopolymer Binders Were Fabricated using Metakaolin, CDW, and Battery Waste (BW) Powders as Starting Materials and a Mixture of Potassium Silicate and Sodium Hydroxide as Activation Solutions. 5 Formulations with BW Powder Replacements Ranging from 5 to 40 Wt% Were Prepared and Subjected to Heat Curing at 80 °C for 24 H. the Effect of Zn-C Battery Waste Content on the Phase Composition, Densification, …
Investigative Research On Design Parameters And Criticality Models For Microreactors, 2024 University of Nevada, Las Vegas
Investigative Research On Design Parameters And Criticality Models For Microreactors, Cameron Jensen
UNLV Theses, Dissertations, Professional Papers, and Capstones
With increased energy demand and the desire to reduce reliance on fossil fuels, nuclear power will need to play a prominent role in achieving carbon-free energy independence. Large nuclear reactors are necessary to meet this objective. However, they are expensive and take a long time to build. For remote locations (e.g., military bases) and smaller communities, large nuclear reactors would not be feasible or cost effective. Small reactors (microreactors) can fill this necessary gap. These reactors would be factory-built, delivered quickly, and operated with high intrinsic levels of safety. With microreactors still in conceptual and testing states, there is a …
Remote Detection Of Leaks In High Level Waste Storage Tanks, 2024 University of Nevada, Las Vegas
Remote Detection Of Leaks In High Level Waste Storage Tanks, Hunter Frey
UNLV Theses, Dissertations, Professional Papers, and Capstones
The purpose of this research was to characterize three devices potentially capable of remotely detecting signatures of a leak from high-level waste (HLW) storage tanks, specifically ones found at the Savannah River Site and the Hanford Site. The hazard HLW found within these tanks include 137Cs, a gamma-ray emitter, and 90Sr, an electron emitter leading to heat generation. These pose health risks to the personnel and maintenance problems and environmental safety issues if released to the environment. Additionally, pinpointing the location of a leak is a task that could lead to the mitigation of excess waste leaking from …
Multi-Objective Radiological Analysis In Real Environments, 2024 University of Tennessee, Knoxville
Multi-Objective Radiological Analysis In Real Environments, David Raji
Doctoral Dissertations
Designing systems to solve problems arising in real-world radiological scenarios is a highly challenging task due to the contextual complexities that arise. Among these are emergency response, environmental exploration, and radiological threat detection. An approach to handling problems for these applications with explicitly multi-objective formulations is advanced. This is brought into focus with investigation of a number of case studies in both natural and urban environments. These include node placement in and path planning through radioactivity-contaminated areas, radiation detection sensor network measurement update sensitivity, control schemes for multi-robot radioactive exploration in unknown environments, and adversarial analysis for an urban nuclear …
Development Of Novel Cesium Chloride-Based Ultrafast Inorganic Scintillators For Fast Timing Radiation Detection Applications, 2024 University of Tennessee, Knoxville
Development Of Novel Cesium Chloride-Based Ultrafast Inorganic Scintillators For Fast Timing Radiation Detection Applications, Daniel Rutstrom
Doctoral Dissertations
Cs2ZnCl4 [dicesium zinc tetrachloride] and Cs3ZnCl5 [tricesium zinc pentachloride] are relatively new scintillator materials that appear to be promising for use in fast-timing radiation detection applications owing to their 1 to 2 nanosecond decay times. Moreover, they offer several advantages over the state-of-the-art ultrafast inorganic scintillator BaF2 [barium fluoride]. To fully realize the potential of these novel materials, growth of crystals having improved optical quality must be demonstrated. The mechanism responsible for the ultrafast decay times, core valence luminescence (CVL), in cesium zinc chloride crystals can also be observed in other compounds containing …