A5058018734- Geology and Paleoclimatology Research
- Climate change and permafrost
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Isotope Analysis in Ecology
- Mental Health and Psychiatry
- Archaeology and ancient environmental studies
- Safety Warnings and Signage
- Infection Control in Healthcare
- Pleistocene-Era Hominins and Archaeology
- Patient-Provider Communication in Healthcare
- Psychotherapy Techniques and Applications
- Moravian Church and William Blake
- Geological formations and processes
- Botany, Ecology, and Taxonomy Studies
- Landslides and related hazards
- Social Representations and Identity
- Empathy and Medical Education
- Archaeology and Natural History
- Occupational Health and Safety Research
- American Environmental and Regional History
University of Alberta
2022-2025
University College London
2023
University of Kansas
2022
Royal Alberta Museum
2019
The segmentation of ice in X-ray Computed Tomography (CT) scans permafrost samples has traditionally relied on the Hounsfield Unit (HU) thresholding approach while their accuracy is often limited by overlapping density ranges complex and heterogeneous samples. Recent advances, including automated algorithms machine learning techniques, offer improved precision leveraging texture, contrast, morphological features CT images. This study investigates evolution methodologies applying multiple...
Freeze–thaw cycling is a critical issue in cold-climate engineering because these cycles impact the mechanical properties of soils due to translocation water and ice at temperatures near 0 °C. Reinforcement methods have been developed decrease adverse effects, including use polypropylene (PP) fibers. However, few macrostructural investigations able demonstrate underlying physical basis for their effectiveness. This study used computed tomography (CT) images clay samples reinforced with 2% PP...
Abstract. Radiocarbon dating marine sediments is complicated by the strongly heterogeneous age of ocean waters. Tephrochronology provides a well-established method to constrain local radiocarbon reservoirs and more accurately calibrate dates. Numerous ultra-distal cryptotephra deposits (non-visible volcanic ash than 3000 km from source) have been identified in peatlands lake across north-eastern North America correlated with arcs Pacific north-west. Previously, however, these isochrons not...
Abstract. Permafrost cores provide physical samples that can be used to measure the characteristics of frozen ground. Measurements core properties, however, are typically destructive and time intensive. In this study, multi-sensor logging (MSCL) is a rapid (∼2–3 cm depth per minute), high-resolution, non-destructive method image collect properties permafrost cores, allowing for visualization cryostructures estimation bulk density, magnetic susceptibility, volumetric ice content. Six with...
Abstract For decades, the Old Crow tephra has been a prominent stratigraphic marker for onset of Marine Isotope Stage (MIS) 5e, last interglaciation, in subarctic northwest North America. However, new zircon U-Pb dates suggest that was deposited ca. 207 ka during MIS 7, with wide-ranging implications chronologies glaciation, paleoclimate, relict permafrost, and phylogeography. We analyzed ~1900 detrital glass shards from 28 samples collected at Integrated Ocean Drilling Program Site U1345...
Abstract. The distribution and abundance of ground ice in permafrost is a fundamental property that determines the potential for thaw subsidence terrain effects landscapes. However, most methods to characterize are destructive low resolution. Here, some limitations traditional overcome using industrial computed tomography (CT) scanning systematically log cores, visualize cryostructures, measure frozen bulk density, estimate volumetric excess contents non-destructively. results show strong...
Abstract Aims The functional-organic distinction attempts to differentiate disorders with diagnosable biological causes from those without and is a central axis on which diagnoses, medical specialities, services are organised. Previous studies report poor agreement between clinicians regarding the meanings of terms some conditions they apply, while noting value-laden implications relevant diagnoses. Consequently, we aimed understand how working in psychiatry neurology navigate their work....
Abstract. Permafrost cores provide physical samples that can be used to measure the characteristics of frozen ground. Measurement core properties, however, are typically destructive and time intensive. In this study, multi-sensor logging (MSCL) is a rapid, high-resolution, non-destructive method image collect properties permafrost cores, allowing visualization cryostructures, measurement bulk density magnetic susceptibility, estimation volumetric ice content. Six with differing were analyzed...
Hand sanitization by healthcare staff remains one of the most effective ways for controlling infection in settings. However, predicting faithful adherence to Hygiene Compliance (HHC) is difficult complex environments such as inpatient hospital The main challenge understanding how different components human and built systems interact achieve specific goals HHC at critical moments care delivery. aim this explorative study was evaluate Human Factors derived visual salience cues...
The functional-organic distinction attempts to differentiate disorders with diagnosable biological causes from those without and is a central axis on which diagnoses, medical specialities services are organised. Previous studies report poor agreement between clinicians regarding the meanings of terms conditions they apply, as well noting value-laden implications relevant diagnoses. Consequently, we aimed understand how working in psychiatry neurology navigate their work. Twenty (10...
Complete code for Placentia Bay, Model I and II.All models were developed using Oxcal v.4.4.4 (Bronk Ramsey, 2009).The main difference between II is that includes only a single "Delta_R" calculation the whole core, while independent Delta_Rs each radiocarbon date chronology constrained by two tephra ages; Mazama Ash, White River Asheastern lobe.Secondarily, slightly reduced interpolation rate, given its added complexity.Both produced outputs at 1 mm depth resolution. I// Delta_R values...
Abstract. Radiocarbon dating marine sediments is complicated by the strongly heterogeneous age of ocean waters. Tephrochronology provides a well established method to constrain local radiocarbon reservoirs and more accurately calibrate dates. Numerous ultra-distal cryptotephra deposits (non-visible volcanic ash >3000 km from source) have been identified in peatlands lake across north-eastern North America, correlated with arcs Pacific north-west. Previously, however, these isochrons never...