Rodney C. Ewing
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View article: Multi-stage phase transformation pathways in MAX phases
Multi-stage phase transformation pathways in MAX phases Open
Diverse, multi-stage phase transformations occur in many materials under extreme environments. In response to irradiation, some MAX phase compositions transform from an initial hexagonal structure to an intermediate γ-phase, then to a face…
View article: Urban Arterial Lane Width Versus Speed and Crash Rates: A Comprehensive Study of Road Safety
Urban Arterial Lane Width Versus Speed and Crash Rates: A Comprehensive Study of Road Safety Open
Reducing vehicle lane widths has been proposed as an effective strategy to decrease vehicle speeds and enhance road safety. However, the safety benefits of narrower travel lanes remain a topic of debate due to mixed findings in the literat…
View article: Atomic-scale structure of ZrO <sub>2</sub> : Formation of metastable polymorphs
Atomic-scale structure of ZrO <sub>2</sub> : Formation of metastable polymorphs Open
Metastable phases can exist within local minima in the potential energy landscape when they are kinetically “trapped” by various processing routes, such as thermal treatment, grain size reduction, chemical doping, interfacial stress, or ir…
View article: Atomic-scale structural analysis of metastable zirconia
Atomic-scale structural analysis of metastable zirconia Open
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View article: Pyrochlore-type lanthanide titanates and zirconates: Synthesis, structural peculiarities, and properties
Pyrochlore-type lanthanide titanates and zirconates: Synthesis, structural peculiarities, and properties Open
This contribution provides a thorough examination of the structural characteristics of pyrochlore-type lanthanide titanates and zirconates Ln2Ti2O7 and Ln2Zr2O7, across various length scales. This paper also examines their processing, inte…
View article: US Legal and Regulatory Framework for Nuclear Waste from Present and Future Reactors and Their Fuel Cycles
US Legal and Regulatory Framework for Nuclear Waste from Present and Future Reactors and Their Fuel Cycles Open
The nuclear waste management and disposal program in the United States for highly radioactive waste (spent nuclear fuel and high-level waste) has thus far been unsuccessful despite an effort that spans 40 years and the expenditure of tens …
View article: Nuclear waste Educator's workshop: What and how do we teach about nuclear waste?
Nuclear waste Educator's workshop: What and how do we teach about nuclear waste? Open
A workshop was held at the Massachusetts Institute of Technology (MIT) on July 25th and 26th, 2022. The objective was to develop a blueprint for educating next-generation engineers and scientists about nuclear waste management and disposal…
View article: Probing structural disorder in zircon by electron backscatter diffraction (EBSD): Radiation damage and Kikuchi pattern
Probing structural disorder in zircon by electron backscatter diffraction (EBSD): Radiation damage and Kikuchi pattern Open
Electron backscatter diffraction (EBSD) was employed to probe the structural order of a zoned radiation-damaged zircon (ZrSiO4) on the sub-micron scale. The amorphous fraction of the growth-zones is in the range of ∼45–80%, due to variatio…
View article: Improving the creation of SiV centers in diamond via sub-μs pulsed annealing treatment
Improving the creation of SiV centers in diamond via sub-μs pulsed annealing treatment Open
Silicon-vacancy (SiV) centers in diamond are emerging as promising quantum emitters in applications such as quantum communication and quantum information processing. Here, we demonstrate a sub-μs pulsed annealing treatment that dramaticall…
View article: Method of immobilizing weapons plutonium to provide a durable, disposable waste product
Method of immobilizing weapons plutonium to provide a durable, disposable waste product Open
A method of atomic scale fixation and immobilization of plutonium to provide a durable waste product. Plutonium is provided in the form of either PuO.sub.2 or Pu(NO.sub.3).sub.4 and is mixed with and SiO.sub.2. The resulting mixture is col…
View article: Mineral Detection of Neutrinos and Dark Matter. A Whitepaper
Mineral Detection of Neutrinos and Dark Matter. A Whitepaper Open
Minerals are solid state nuclear track detectors - nuclear recoils in a mineral leave latent damage to the crystal structure. Depending on the mineral and its temperature, the damage features are retained in the material from minutes (in l…
View article: Effect of Dipole Interactions on Blocking Temperature and Relaxation Dynamics of Superparamagnetic Iron-Oxide (Fe3O4) Nanoparticle Systems
Effect of Dipole Interactions on Blocking Temperature and Relaxation Dynamics of Superparamagnetic Iron-Oxide (Fe3O4) Nanoparticle Systems Open
The effects of dipole interactions on magnetic nanoparticle magnetization and relaxation dynamics were investigated using five nanoparticle (NP) systems with different surfactants, carrier liquids, size distributions, inter-particle spacin…
View article: Systematic study of short- and long-range correlations in RE<sub>3</sub>TaO<sub>7</sub> weberite-type compounds by neutron total scattering and X-ray diffraction
Systematic study of short- and long-range correlations in RE<sub>3</sub>TaO<sub>7</sub> weberite-type compounds by neutron total scattering and X-ray diffraction Open
The atomic structures of the lanthanide tantalates, Ln 3 TaO 7 , series (Ln = Pr, Tb, Dy, Ho, Tm, Yb) were systematically investigated using total scattering techniques.
View article: Critical metal resources in Democratic People’s Republic of Korea
Critical metal resources in Democratic People’s Republic of Korea Open
Critical metals (CMs), including rare-earth elements (REEs), lithium (Li), and beryllium (Be), provide the foundation for the development of advanced technologies and are essential to national security and economic development in many coun…
View article: Radioactive Nano- and Microparticles Released from Fukushima Daiichi: Technical Challenges of Multiple Analytic Techniques
Radioactive Nano- and Microparticles Released from Fukushima Daiichi: Technical Challenges of Multiple Analytic Techniques Open
A total activity of ∼1019 Bq, including ∼1016 Bq of 137Cs, was released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) in 2011, among which 137Cs (30.1 years half-life) will remain in the environment for decades either in the form …
View article: Growth Management Effectiveness: A Literature Review
Growth Management Effectiveness: A Literature Review Open
Although growth management programs have many purposes, a critical one is to contain urban and suburban sprawl. Their efficacy in this regard is not well understood. In this paper, we review a comprehensive set of growth management tools, …
View article: Tech Notes: Tracking community access to Data Lifecycle data using Knowledge Graphs
Tech Notes: Tracking community access to Data Lifecycle data using Knowledge Graphs Open
A knowledge graph is a way to represent data and information that emphasizes the relationships between things. Conceptually, we think of them as a mathematical graph with labeled nodes and labeled edges connecting the nodes. Knowledge grap…
View article: Nuclear waste from small modular reactors
Nuclear waste from small modular reactors Open
Small modular reactors (SMRs; i.e., nuclear reactors that produce <300 MW elec each) have garnered attention because of claims of inherent safety features and reduced cost. However, remarkably few studies have analyzed the management and d…
View article: Scooting to a New Era in Active Transportation:Examining the Use and Safety of E-scooters
Scooting to a New Era in Active Transportation:Examining the Use and Safety of E-scooters Open
The modern transportation paradigm is an ever-shifting target and, most recently, micro-mobility options such as electric shared scooter systems (e-scooters) have been contributing to local municipalities’ ability to adapt. Although severa…