A5020069876- Geological and Geochemical Analysis
- Geomagnetism and Paleomagnetism Studies
- Nuclear reactor physics and engineering
- Astro and Planetary Science
- Geophysical and Geoelectrical Methods
- Geochemistry and Geologic Mapping
- Nuclear Physics and Applications
- Advanced X-ray Imaging Techniques
- Mineral Processing and Grinding
- High-pressure geophysics and materials
- Cryospheric studies and observations
- Magnetic and Electromagnetic Effects
- Planetary Science and Exploration
- Nuclear Engineering Thermal-Hydraulics
- Characterization and Applications of Magnetic Nanoparticles
- Nuclear Materials and Properties
- Remote-Sensing Image Classification
- Ion-surface interactions and analysis
- Blind Source Separation Techniques
- IoT-based Smart Home Systems
- 3D Surveying and Cultural Heritage
- Urban Heat Island Mitigation
- Neural Networks and Applications
- Remote Sensing and LiDAR Applications
- Graphite, nuclear technology, radiation studies
University of Cambridge
2017-2024
Diamond Light Source
2023
Harvard University Press
2023
McMaster University
2013-2014
Lancaster University
2006-2008
Abstract A wide variety of Earth and planetary materials are very good recorders paleomagnetic information. However, most magnetic grains in these not the stable single domain grain size range but larger nonuniform vortex magnetization states. We provide a detailed account phenomena geologic by simulating first‐order reversal curves (FORCs) via finite‐element micromagnetic modeling magnetite nanoparticles with realistic morphologies. The particles have been reconstructed from focused ion...
Volcano observatories and researchers are recognizing the potential usefulness of thermal imaging cameras both before during volcanic eruptions. Obvious applications include measurements surface temperatures active lava domes flows to determine location most parts these potentially hazardous features. If appropriate precautions taken, new generation can be used extract quantitative as well qualitative information on activity. For example, they measure temperature eruption reveal how crust...
A broad spectrum of fully differentiated, partially melted, and possibly unmelted objects populated the early solar system.
We apply X-ray ptycho-tomography to perform high-resolution, non-destructive, three-dimensional (3D) imaging of Fe-rich inclusions in paleomagnetically relevant materials (zircon single crystals from the Bishop Tuff ignimbrite). Correlative using quantum diamond magnetic microscopy combined with fluorescence mapping was used locate regions containing potential ferromagnetic remanence carriers. Ptycho-tomographic reconstructions voxel sizes 85 nm and 21 were achievable across a field-of-view...
Deterministic lattice physics transport calculations are used extensively within the context of operational and safety analysis nuclear power plants. As such sensitivity uncertainty in evaluated data to predict neutronic interactions other key phenomena critical topics for research. Sensitivity systems with respect fundamental using multi-energy-group discretization is complicated by dilution dependency multi-group macroscopic cross-sections as a result resonance self-shielding. It has...
Abstract Identification of unknown micro‐ and nano‐sized mineral phases is commonly achieved by analyzing chemical maps generated from hyperspectral imaging data sets, particularly scanning electron microscope—energy dispersive X‐ray spectroscopy (SEM‐EDS). However, the accuracy reliability identification are often limited subjective human interpretation, non‐ideal sample preparation, presence mixed signals within electron‐beam interaction volume. Machine learning has emerged as a powerful...
Single board computers (SBCs) are a class of devices where the entirety computer is printed on single circuit board. The Raspberry Pi perhaps most popular SBC market today. version 3 (1.2 Ghz A53 CPU, 2 GB RAM), and Zero W (1.0 ARM11 512 MB cost $35.00 $10.00 respectively, both include integrated wireless Bluetooth. Unlike microcontrollers, SBCs fully functioning with more memory processing power than typical sensor. Their powerful System-on-a-Chip (SoC) processors make good candidates for...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at G-Cubed. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]SIGMA: Spectral Interpretation using Gaussian Mixtures AutoencoderAuthorsPo-YenTungiDHassan AftabSheikhiDMatthew RBallFarhangNabieiRichardHarrisonSee all authors Po-Yen TungiDCorresponding Author•...
the large field of view microscopy, we show that entire PGE budget samples can be explained using this phase, which is enriched by up to four orders magnitude relative continental crust.Both CI (solar abundance) normalised concentrations and interelement ratios PGEs demonstrate impactor came from a chondritic parent body, whilst identify it as previously undescribed body.This methodology also opens door for more detailed direct study concentration distribution within ore deposits [5].
The helium ion microscope (HIM) is a focussed beam instrument with unprecedented spatial resolution for secondary electron imaging but has traditionally lacked microanalytical capabilities. With the addition of mass spectrometry (SIMS) attachment, capabilities have expanded to microanalysis isotopes from Li up hundreds atomic units, effectively opening analysis all natural and geological systems. However, thus far been underutilised by geosciences community, due in no small part lack...
The propagation of nuclear data uncertainties through reactor physics calculation has received attention the Organization for Economic Cooperation and Development—Nuclear Energy Agency’s Uncertainty Analysis in Modelling (UAM) benchmark. A common strategy performing lattice uncertainty analysis involves starting with covariance matrix which is typically available at infinite dilution. To describe all multigroup parameters—including those finite dilution—additional calculations must be...
Abstract We present the first application of X-ray ptycho-tomography to perform high-resolution, non-destructive, three-dimensional (3D) imaging magnetic inclusions in paleomagnetically relevant materials (zircon crystals from Bishop Tuff ignimbrite). Correlative microscopy using quantum diamond combined with fluorescence mapping was used locate regions containing Fe-bearing remanence carriers. Ptycho-tomographic reconstructions voxel sizes 85 nm and 21 were achievable across a field-of-view...