Browsing by Author "DeWitt, Regina"
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Central Santa Catarina coastal dunefields chronology and their relation to relative sea level and climatic changes
Mendes, Vinícius Ribau; Giannini, Paulo César Fonseca; Guedes, Carlos Conforti Ferreira; DeWitt, Regina; Andrade, Helena Asmar de Abreu (2015)During the past decades, there have been contrarian explanations for the formation and stabilization of coastal dunefields: while many authors believe the dunes formation would be enhanced by falling sea level, others argue ... -
DEFINING THE STRATIGRAPHIC AND PALEOENVIRONMENTAL RECORD OF RAPID SEA-LEVEL RISE DURING THE LATE PLEISTOCENE TO HOLOCENE IN THE ALBEMARLE SOUND REGION OF NORTH CAROLINA
Gudmunson, Erik Kenneth (East Carolina University, 2022-08-19)We need to replace the abstract. -
Development of an Instrument for Spatially Resolved, Optically Stimulated Luminescence Dosimetry of Cobble Surfaces
Garcia, Christopher (East Carolina University, 2023-07-18)Optically stimulated luminescence (OSL) dosimetry is a method used to determine the amount of energy stored within a crystalline insulator due to ionizing radiation. At its most fundamental, OSL dosimetry requires optical ... -
Electron Emission from Fast Proton and Carbon Ion Interactions with Gold Nanoparticles and Amorphous Solid Water
Hawkins, Wilson (East Carolina University, 2021-07-22)Widely used in the treatment of cancer, radiation therapy delivers a lethal dose of energy to malignant tissue. Modeling the deposition of energy in the interactions of the radiation with biological material is important ... -
Evidence for a “Little Ice Age” Glacial Advance within the Antarctic Peninsula - Examples from Glacially-Overrun Raised Beaches
DeWitt, Regina; Simms, Alexander R.; Bentley, Michael J.; Simkins, Lauren M.; Zurbuchen, Julie; Reynolds, Laura C.; Thomas, Elizabeth R. (2021-10-02) -
Lèvy noise induced steady states
Yuvan, Steven (East Carolina University, 2022-06-08)Systems far from equilibrium organize themselves to accommodate energy throughput. It is also in these nonequilibrium systems where noise has often been found to follow alpha-stable distributions, commonly called Lévy ... -
Lèvy noise induced steady states
Yuvan, Steven (East Carolina University, 2022-06-08)Systems far from equilibrium organize themselves to accommodate energy throughput. It is also in these nonequilibrium systems where noise has often been found to follow alpha-stable distributions, commonly called Lèvy ... -
Luminescence characteristics of quartz from Brazilian sediments and constraints for OSL dating
GUEDES, CARLOS C.F.; SAWAKUCHI, ANDRÉ O.; GIANNINI, PAULO C.F.; DeWitt, Regina; AGUIAR, VITOR A.P. (2013-09-27)This study analyzes the optically stimulated luminescence (OSL) characteristics of quartz grains from fluvial, eolian and shallow marine sands of northeastern and southeastern Brazil, with especial focus on the applicability ... -
SAFE HAVENS AND HOT SPOTS: IONIZING RADIATION IN MARTIAN PERMAFROST AND ITS INFLUENCE ON THE SURVIVAL OF ANCIENT LIFE
Osunkwor, Offormata Emmanuel (East Carolina University, 2022-06-20)Permafrost on Mars is considered a primary target for the search for life. On a microscopic scale permafrost is highly non-uniform and the effective radiation dose absorbed by a microbe, and thus its survival probability, ... -
SAFE HAVENS AND HOT SPOTS: IONIZING RADIATION IN MARTIAN PERMAFROST AND ITS INFLUENCE ON THE SURVIVAL OF ANCIENT LIFE
Osunkwor, Offormata Emmanuel (East Carolina University, 2022-06-20)Permafrost on Mars is considered a primary target for the search for life. On a microscopic scale permafrost is highly non-uniform and the effective radiation dose absorbed by a microbe, and thus its survival probability, ... -
The Effects of Low-Energy Heavy Charged Particles on the Optically Stimulated Luminescence and Thermoluminescence of Aluminum Oxide and Beryllium Oxide
Pogue, Joel (East Carolina University, 2021-06-02)Optically Stimulated Luminescence (OSL) and Thermoluminescence (TL) are methods utilized to evaluate the energy absorbed by crystalline insulators. It is necessary to test luminescent materials in a controlled environment ...