Browsing Physics by Title
Now showing items 17-36 of 70
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Development of a Finite Difference Time Domain (FDTD) Model for Propagation of Transient Sounds in Very Shallow Water
(2013-08-12)We developed a finite difference time domain (FDTD) model for sound propagation using pressure and velocity grids with both three-dimensional Cartesian and two-dimensional cylindrical implementations. Propagation parameters, ... -
DOSIMETRIC STUDY OF BETA-MINUS EMITTER PRASEODYMIUM-142 : APPLICATIONS IN MICROSPHERE BRACHYTHERAPY FOR HEPATOCELLULAR CARCINOMA AND BRACHYTHERAPY FOR OCULAR SQUAMOUS CELL CARCINOMA
(East Carolina University, 2013)A dosimetric study of the beta-minus emitter Praseodymium-142 (¹⁴²Pr) was performed and two main innovative applications of this source in brachytherapy are proposed: microsphere brachytherapy and eye plaque brachytherapy. ... -
Elastic and inelastic light scattering from single bacterial spores in an optical trap allows the monitoring of spore germination dynamics
(East Carolina University, 2009-05-15)Raman scattering spectroscopy and elastic light scattering intensity (ESLI) were used to simultaneously measure levels of Ca-dipicolinic acid (CaDPA) and changes in spore morphology and refractive index during germination ... -
Electron Emission from Foils and Biological Materials after Proton Impact
(East Carolina University, 2008-10)Electron emission spectra from thin metal foils with thin layers of water frozen on them (amorphous solid water) after fast proton impact have been measured and have been simulated in liquid water using the event-by-event ... -
Evaluation of Magnetic Resonance Imaging in Prostate Radiotherapy for Improved Treatment Outcomes
(East Carolina University, 2019-05-01)External beam radiation therapy is among the most common modalities of curative treatment for prostate cancer and has evolved substantially with the inclusion of multimodality imaging in treatment planning. It has been ... -
Fast Carbon-Ion and Proton Induced Electron Emission from Condensed-Phase Biological Targets
(East Carolina University, 2018-07-23)Fast charged particles interact with matter through various ionization and excitation pathways that aren't fully understood. Predicting the effects of these interactions is vital in many fields such as radiation therapy, ... -
Feasibility Study of Dual Energy Radiographic Imaging for Target Localization in Radiotherapy for Lung Tumors
(2014)Purpose Dual-energy (DE) radiographic imaging improves tissue discrimination by separating soft from hard tissues in the acquired images. This study was to establish a mathematic model of DE imaging based on intrinsic ... -
FETUS PHANTOM CONSTRUCTIONS FOR OVERWEIGHT AND OBESE PREGNANT FEMALES FOR RADIOLOGICAL APPLICATIONS
(East Carolina University, 2019-06-07)Radiation exposure and associated radiation risks are major concerns for fetal development for pregnant patients in general, and in particular for overweight and obese pregnant patients who undergo diagnostic imaging or ... -
Flow cytometer apparatus for three dimensional diffraction imaging and related methods
(2009-12-17)A flow cytometer assembly includes a fluid controller configured to form a hydrodynamically focused flow stream including an outer sheath fluid and an inner core fluid. A coherent light source is configured to illuminate ... -
Flow cytometer apparatus for three dimensional difraction imaging and related methods
(2015-04-21)A flow cytometer assembly includes a fluid controller configured to form a hydrodynamically focused flow stream including an outer sheath fluid and an inner core fluid. A coherent light source is configured to illuminate ... -
Four-Dimensional In Vivo Dosimetry By Dose Reconstruction Using Continuous Epid Images And Phase Sorting Method
(East Carolina University, 2015)In vivo dosimetry is widely used for patient specific dose evaluation and treatment verification in external beam radiation therapy (EBRT). There is a growing interest in using an electronic portal imaging device (EPID) ... -
Generation of Pseudo-CT using Two Sets of MRI Scans for MRI-only Radiation Therapy
(East Carolina University, 2019-07-16)WWith increasing interests in magnetic resonance imaging (MRI)-only radiation therapy (RT) and the emergence of MRI system integrated with the linear accelerator, a method substituting the computed tomography (CT) in ... -
Graviton and photon orbitals surrounding a black hole : Application to the supermassive black hole at the Milky Way galactic center, with NIR observational confirmation.
(East Carolina University, 2014)Non-relativistic Quantum Theory fairly accurately describes the resonance phenomena around a black hole, even though black holes are thought of as general relativistic (GR) objects. Graphically and numerically we are able ... -
The high concentration of Arg213 → Gly extracellular superoxide dismutase (EC-SOD) in plasma is caused by a reduction of both heparin and collagen affinities
(East Carolina University, 2005-01-15)The C-terminal region of EC-SOD (extracellular superoxide dismutase) mediates the binding to both heparin/heparan sulphate and type I collagen. A mutation (Arg213→Gly; R213G) within this extracellular matrix-binding region ... -
How Moist Heat Kills Spores of Bacillus subtilis
(East Carolina University, 2007-12)Populations of Bacillus subtilis spores in which 90 to 99.9% of the spores had been killed by moist heat gave only two fractions on equilibrium density gradient centrifugation: a fraction comprised of less dense spores ... -
In Vivo Blood Glucose Quantification Using Raman Spectroscopy
(2012)We here propose a novel Raman spectroscopy method that permits the noninvasive measurement of blood glucose concentration. To reduce the effects of the strong background signals produced by surrounding tissue and to obtain ... -
An Information-Theoretic Approach to Cellular Decision-Making Strategies: How Rate Distortion Theory Provides an Optimal Method for Describing Binary Cellular Decision-Making Systems
(2014)Rate distortion theory, a branch of information theory, was originally developed to help improve the efficiency of data transmission in telecommunications. It's currently being used as a major modeling method to provide ... -
Inherent Fibrin Fiber Tension Propels Mechanisms of Network Clearance During Fibrinolysis
(2020-02-25)Proper wound healing necessitates both coagulation (the formation of a blood clot) and fibrinolysis (the dissolution of a blood clot). A thrombus resistant to clot dissolution can obstruct blood flow, leading to vascular ... -
Inherent fibrin fiber tension propels mechanisms of network clearance during fibrinolysis
(2020-04-15)Proper wound healing necessitates both coagulation (the formation of a blood clot) and fibrinolysis (the dissolution of a blood clot). A thrombus resistant to clot dissolution can obstruct blood flow, leading to vascular ... -
Interaction cross sections needed for simulation of secondary electron emission spectra from thin metal foils after fast proton impact
(East Carolina University, 2009)Monte Carlo simulations of secondary electron emission from thin metal foils after fast proton impact require reliable interaction cross sections with the target under consideration. Total and energy differential inelastic ...