Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Earth Sciences (1801)
- Environmental Sciences (656)
- Geology (472)
- Mathematics (411)
- Computer Sciences (348)
-
- Engineering (342)
- Chemistry (310)
- Arts and Humanities (281)
- Oceanography and Atmospheric Sciences and Meteorology (246)
- American Studies (238)
- Environmental Indicators and Impact Assessment (218)
- Life Sciences (210)
- Education (202)
- Social and Behavioral Sciences (201)
- Physics (162)
- Statistics and Probability (161)
- Other Oceanography and Atmospheric Sciences and Meteorology (131)
- Geomorphology (125)
- Geochemistry (124)
- Science and Mathematics Education (109)
- Hydrology (107)
- Medicine and Health Sciences (105)
- Speleology (98)
- Civil and Environmental Engineering (93)
- Water Resource Management (91)
- Geography (70)
- Sustainability (69)
- Geophysics and Seismology (65)
- Oil, Gas, and Energy (64)
- Keyword
-
- Hillsborough Bay (63)
- Florida (62)
- Seagrass (62)
- Quantitative literacy (61)
- Water quality (56)
-
- Caulerpa prolifera (54)
- Karst (53)
- Nitrogen (53)
- Romania (53)
- Tampa Bay (53)
- Sediments (50)
- Environment (45)
- Sewage (42)
- Mathematics (41)
- Mud (41)
- Nutrient (41)
- Areal photo (40)
- Chlorophyll (40)
- Hooker's Point (40)
- Monitoring sites (40)
- Regulation (40)
- Seabed (40)
- Sewage treatment (40)
- Tampa Bay Area Study Group (40)
- Wastewater management (40)
- Assessment (35)
- Geology (32)
- Numeracy (32)
- Quantitative reasoning (32)
- Speleogenesis (32)
- Publication Year
- Publication
-
- USF Tampa Graduate Theses and Dissertations (1607)
- International Journal of Speleology (872)
- School of Geosciences Faculty and Staff Publications (335)
- Studia UBB Geologia (211)
- Undergraduate Journal of Mathematical Modeling: One + Two (180)
-
- Numeracy (164)
- Reports (162)
- Sinkhole Conference 2015 (48)
- Geology Faculty Publications (39)
- Chemistry Faculty Publications (22)
- Data Sets (20)
- Images (20)
- The International Workshop on Ice Caves (18)
- National Cave and Karst Management Symposium 2013 (17)
- USF St. Petersburg campus Faculty Publications (16)
- Physics Faculty Publications (15)
- Yonggang Liu (12)
- Mathematics and Statistics Faculty Publications (11)
- School of Geosciences Student Publications (11)
- Military Cyber Affairs (10)
- FRONTIERS UNBOUND: Exploring Extreme Environments (9)
- University of South Florida (USF) M3 Publishing (8)
- Environmental Sustainability Oral Histories (6)
- Marine Science Faculty Publications (5)
- Academic Resources Faculty and Staff Publications (4)
- Leadership, Counseling, Adult, Career and Higher Education Faculty Publications (4)
- Suburban Sustainability (4)
- Textbooks Collection (4)
- Todd A. Chavez (4)
- Environmental Sustainability Books (3)
- Publication Type
- File Type
Articles 1321 - 1350 of 3859
Full-Text Articles in Physical Sciences and Mathematics
Greenland Subglacial Drainage Evolution Regulated By Weakly Connected Regions Of The Bed, Matthew J. Hoffman, Lauren C. Andrews, Stephen F. Price, Ginny A. Catania, Thomas A. Neumann, Martin P. Lüthi, Jason Gulley, Claudia Ryser, Robert L. Hawley, Blaine Morriss
Greenland Subglacial Drainage Evolution Regulated By Weakly Connected Regions Of The Bed, Matthew J. Hoffman, Lauren C. Andrews, Stephen F. Price, Ginny A. Catania, Thomas A. Neumann, Martin P. Lüthi, Jason Gulley, Claudia Ryser, Robert L. Hawley, Blaine Morriss
School of Geosciences Faculty and Staff Publications
Penetration of surface meltwater to the bed of the Greenland Ice Sheet each summer causes an initial increase in ice speed due to elevated basal water pressure, followed by slowdown in late summer that continues into fall and winter. While this seasonal pattern is commonly explained by an evolution of the subglacial drainage system from an inefficient distributed to efficient channelized configuration, mounting evidence indicates that subglacial channels are unable to explain important aspects of hydrodynamic coupling in late summer and fall. Here we use numerical models of subglacial drainage and ice flow to show that limited, gradual leakage of …
Precursor Motion To Iceberg Calving At Jakobshavn Isbræ, Greenland, Observed With Terrestrial Radar Interferometry, Surui Xie, Timothy H. Dixon, Denis Voytenko, David M. Holland, Tiantian Zheng
Precursor Motion To Iceberg Calving At Jakobshavn Isbræ, Greenland, Observed With Terrestrial Radar Interferometry, Surui Xie, Timothy H. Dixon, Denis Voytenko, David M. Holland, Tiantian Zheng
School of Geosciences Faculty and Staff Publications
Time-varying elevations near the calving front of Jakobshavn Isbræ, Greenland were observed with a terrestrial radar interferometer (TRI) in June 2015. An ice block with surface dimensions of 1370 m × 290 m calved on 10 June. TRI-generated time series show that ice elevation near the calving front began to increase 65 h prior to the event, and can be fit with a simple block rotation model. We hypothesize that subsurface melting at the base of the floating terminus breaks the gravity-buoyancy equilibrium, leading to slow subsidence and rotation of the block, and its eventual failure.
Deep Feature Transfer Learning In Combination With Traditional Features Predicts Survival Among Patients With Lung Adenocarcinoma, Rahul Paul, Samuel H. Hawkings, Matthew B. Schabath, Robert J. Gilies, Lawrence O. Hall, Dmitry Goldgof
Deep Feature Transfer Learning In Combination With Traditional Features Predicts Survival Among Patients With Lung Adenocarcinoma, Rahul Paul, Samuel H. Hawkings, Matthew B. Schabath, Robert J. Gilies, Lawrence O. Hall, Dmitry Goldgof
Computer Science and Engineering Faculty Publications
Lung cancer is the most common cause of cancer-related deaths in the USA. It can be detected and diagnosed using computed tomography images. For an automated classifier, identifying predictive features from medical images is a key concern. Deep feature extraction using pretrained convolutional neural networks (CNNs) has recently been successfully applied in some image domains. Here, we applied a pretrained CNN to extract deep features from 40 computed tomography images, with contrast, of non-small cell adenocarcinoma lung cancer, and combined deep features with traditional image features and trained classifiers to predict short- and long-term survivors. We experimented with several pretrained …
What’S Scale Got To Do With It? Models For Urban Tree Canopy, Dexter H. Locke, Shawn M. Landry, J. M. Grove, Rinku R. Chowdhury
What’S Scale Got To Do With It? Models For Urban Tree Canopy, Dexter H. Locke, Shawn M. Landry, J. M. Grove, Rinku R. Chowdhury
School of Geosciences Faculty and Staff Publications
The uneven provisioning of ecosystem services has important policy implications; yet the spatial heterogeneity of tree canopy remains understudied. Private residential lands are important to the future of Philadelphia’s urban forest because a majority of the existing and possible tree canopy is located on residential land uses. This article examines the spatial distribution of tree canopy in Philadelphia, PA and its social correlates. How are existing tree canopy and opportunities for additional tree canopy distributed across the city of Philadelphia and with respect to three explanations: (i) population density, (ii) the social stratification luxury effect, and 3) lifestyle characteristics of …
Predicting Malignant Nodules From Screening Ct Scans, Samuel Hawkins, Hua Wang, Ying Liu, Alberto Garcia, Olya Stringfield, Henry Krewer, Qiang Li, Dmitry Cherezov, Matthew Schabath, Lawrence O. Hall, Robert J. Gillies
Predicting Malignant Nodules From Screening Ct Scans, Samuel Hawkins, Hua Wang, Ying Liu, Alberto Garcia, Olya Stringfield, Henry Krewer, Qiang Li, Dmitry Cherezov, Matthew Schabath, Lawrence O. Hall, Robert J. Gillies
Computer Science and Engineering Faculty Publications
Objectives
The aim of this study was to determine whether quantitative analyses (“radiomics”) of low-dose computed tomography lung cancer screening images at baseline can predict subsequent emergence of cancer.
Methods
Public data from the National Lung Screening Trial (ACRIN 6684) were assembled into two cohorts of 104 and 92 patients with screen-detected lung cancer and then matched with cohorts of 208 and 196 screening subjects with benign pulmonary nodules. Image features were extracted from each nodule and used to predict the subsequent emergence of cancer.
Results
The best models used 23 stable features in a random forests classifier and could …
Dielectric Analysis Of Aqueous Poly(L-Glutamic Acid) And Poly-L-(Glutamic Acid4, Tyrosine1) Solutions At High Frequencies From Capacitance Measurements, Jorge Monreal, Tatiana Eggers, Manh-Huong Phan
Dielectric Analysis Of Aqueous Poly(L-Glutamic Acid) And Poly-L-(Glutamic Acid4, Tyrosine1) Solutions At High Frequencies From Capacitance Measurements, Jorge Monreal, Tatiana Eggers, Manh-Huong Phan
Physics Faculty Publications
A new parallel-plate capacitor fixture has been designed and successfully used to measure dielectric loss of polyelectrolyte solutions with volumes as low as droplets of 13–26 μL. It is particularly useful when studying polypeptides that are either high-cost or can be synthesized only in limited quantities. The ease with which the fixture can be used to obtain preliminary dielectric loss data yields savings in time and cost. In this study capacitance measurements were performed in a wide range of frequencies between 1 and 800 MHz using an Agilent 4191RF Impedance Analyzer. Accuracy of measurements was carefully examined through a comparison …
Quiescent‐Explosive Transitions During Dome‐Forming Volcanic Eruptions: Using Seismicity To Probe The Volcanic Processes Leading To The 29 July 2008 Vulcanian Explosion Of Soufrière Hills Volcano, Montserrat, Mel Rodgers, Patrick J. Smith, Tamsin A. Mather, David M. Pyle
Quiescent‐Explosive Transitions During Dome‐Forming Volcanic Eruptions: Using Seismicity To Probe The Volcanic Processes Leading To The 29 July 2008 Vulcanian Explosion Of Soufrière Hills Volcano, Montserrat, Mel Rodgers, Patrick J. Smith, Tamsin A. Mather, David M. Pyle
School of Geosciences Faculty and Staff Publications
The July 2008 vulcanian explosion at Soufrière Hills Volcano (SHV), Montserrat, was preceded by one of the largest seismic swarms observed since the start of the eruption. We analyze the spectral and waveform properties of the earthquakes in this swarm and compare these observations to models of subsurface volcanic processes. We observe an initial volcano‐tectonic (VT) swarm, followed by a large low‐frequency (LF) swarm. We observe that the spectral content of LF events changes over time to carry more energy at lower frequencies. This shift to a lower frequency spectral content is concurrent with an increase in LF event rates. …
Exchange Bias Effects In Iron Oxide-Based Nanoparticle Systems, Manh-Huong Phan, Javier Alsonso, Hafsa Khurshid, Paula Lampen-Kelley, Sayan Chandra, Kristen Stojak Repa, Zohreh Nemati, Raja Das, Óscar Iglesias, Hariharan Srikanth
Exchange Bias Effects In Iron Oxide-Based Nanoparticle Systems, Manh-Huong Phan, Javier Alsonso, Hafsa Khurshid, Paula Lampen-Kelley, Sayan Chandra, Kristen Stojak Repa, Zohreh Nemati, Raja Das, Óscar Iglesias, Hariharan Srikanth
Physics Faculty Publications
The exploration of exchange bias (EB) on the nanoscale provides a novel approach to improving the anisotropic properties of magnetic nanoparticles for prospective applications in nanospintronics and nanomedicine. However, the physical origin of EB is not fully understood. Recent advances in chemical synthesis provide a unique opportunity to explore EB in a variety of iron oxide-based nanostructures ranging from core/shell to hollow and hybrid composite nanoparticles. Experimental and atomistic Monte Carlo studies have shed light on the roles of interface and surface spins in these nanosystems. This review paper aims to provide a thorough understanding of the EB and related …
Storm Induced Beach Profile Changes Along The Coast Of Treasure Island, West-Central Florida, U.S.A., Zhaoxu Zhu
Storm Induced Beach Profile Changes Along The Coast Of Treasure Island, West-Central Florida, U.S.A., Zhaoxu Zhu
USF Tampa Graduate Theses and Dissertations
Storms play a significant role in beach morphodynamics. Storm-induced beach-profile changes and their longshore variations are investigated in this study. The impacts of four summer tropical storms and two series of winter storms over the last 10 years along the coast of Treasure Island were documented. Tropical storms Alberto in 2006, Fay in 2008, Debby in 2012, Hermine in 2016 and winter storms in winter seasons of 2014 and 2015 are discussed in this study. In general, the Treasure Island beach experienced more erosion generated by tropical storms with greater intensity, but shorter duration, as compared to winter storms due …
Improved 2d And 3d Resistivity Surveys Using Buried Electrodes And Optimized Arrays: The Multi-Electrode Resistivity Implant Technique (Merit), Henok Gidey Kiflu
Improved 2d And 3d Resistivity Surveys Using Buried Electrodes And Optimized Arrays: The Multi-Electrode Resistivity Implant Technique (Merit), Henok Gidey Kiflu
USF Tampa Graduate Theses and Dissertations
This thesis presents a novel resistivity method called Multi-Electrode resistivity technique (MERIT) that is used for high resolution imaging of complex geologic features at depth and near the edges of survey lines. The MERIT electrodes are especially shaped and designed to be self-driven using a robust-direct push technique. Measurements are taken using optimized arrays that are generated using a modified version of the “Compare-R” optimization algorithm. This work focused on both two-dimensional (MERIT2D) and three-dimensional (MERIT3D) applications of the buried array and show the relevance of the additional information gained by the addition of deep electrodes especially in sites with …
Photocatalytic Reduction Of Co2 With Tunable Bandgap And Bandedge Materials, Thuhuong T. Ngo
Photocatalytic Reduction Of Co2 With Tunable Bandgap And Bandedge Materials, Thuhuong T. Ngo
USF Tampa Graduate Theses and Dissertations
Solar energy is a sustainable resource which has substantial potential to meet the increasing demand for renewable energy. Though there has been some success in harvesting solar energy for electricity production, converting solar energy to chemical energy as fuels is still a challenge due to low efficiency.
Since the discovery of TiO2 photocatalysts for splitting water (4) and reducing CO2 (5) to form useful chemical feedstock such as H2, CO and CH4, much research has been done to increase the efficiency of photocatalysts. However, the current conversion efficiency of photocatalysts remains low (~5%) (6, …
Reduced Dimensionality Effects In Gd-Based Magnetocaloric Materials, Hillary Faith Belliveau
Reduced Dimensionality Effects In Gd-Based Magnetocaloric Materials, Hillary Faith Belliveau
USF Tampa Graduate Theses and Dissertations
Magnetic refrigeration based on the magnetocaloric effect (MCE) is a promising alternative to conventional gas compression based cooling techniques. Understanding impacts of reduced dimensionality on the magnetocaloric response of a material such as Gadolinium (Gd) or its alloys is essential in optimizing the performance of cooling devices, which is also the overall goal of this thesis. We have determined, in the first part of the thesis, that laminate structures of pure Gd produced by magnetron sputtering have several disadvantages. The target material (pure Gd), ultra-high vacuum components, and the electrical energy it takes to run the manufacturing process are all …
Resonant Light Scattering From Semiconductor Quantum Dots, Kumarasiri Konthasinghe
Resonant Light Scattering From Semiconductor Quantum Dots, Kumarasiri Konthasinghe
USF Tampa Graduate Theses and Dissertations
In this work, resonant laser spectroscopy has been utilized in two major projects --resonance fluorescence measurements in solid-state quantum-confined nanostructures and laser-induced fluorescence measurements in gases. The first project focuses on studying resonant light-matter interactions in semiconductor quantum dots "artificial atoms" with potential applications in quantum information science. Of primary interest is the understanding of fundamental processes and how they are affected by the solid-state matrix. Unlike atoms, quantum dots are susceptible to a variety of environmental influences such as phonon scattering and spectral diffusion. These interactions alter the desired properties of the scattered light and hinder uses in certain …
Confinement Effects And Magnetic Interactions In Magnetic Nanostructures, Kristen Lee Stojak Repa
Confinement Effects And Magnetic Interactions In Magnetic Nanostructures, Kristen Lee Stojak Repa
USF Tampa Graduate Theses and Dissertations
Multifunctional nanocomposites are promising for a variety of applications ranging from microwave devices to biomedicine. High demand exists for magnetically tunable nanocomposite materials. My thesis focuses on synthesis and characterization of novel nanomaterials such as polymer nanocomposites (PNCs) and multi-walled carbon nanotubes (MWCNTs) with magnetic nanoparticle (NP) fillers.
Magnetite (Fe3O4) and cobalt ferrite (CoFe2O4) NPs with controlled shape, size, and crystallinity were successfully synthesized and used as PNC fillers in a commercial polymer provided by the Rogers Corporation and poly(vinylidene fluoride). Magnetic and microwave experiments were conducted under frequencies of 1-6 GHz in the presence of …
Mattes J., 2015. Reisen Ins Unterirdische. Eine Kulturgeschichte Der Höhlenforschung In Österreich Bis In Die Zwischenkriegszeit. [Travelling Into The Underground. A Cultural History Of Cave Exploration In Austria Through The Interwar Years], Monika Schöner
International Journal of Speleology
No abstract provided.
Optimal Demand Response Models With Energy Storage Systems In Smart Grids, Mohemmed Masooud Alhaider
Optimal Demand Response Models With Energy Storage Systems In Smart Grids, Mohemmed Masooud Alhaider
USF Tampa Graduate Theses and Dissertations
This research aims to develop solutions to relieve system stress conditions in electric grids. The approach adopted in this research is based on a new concept in the Smart Grid, namely, demand response optimization. A number of demand response programs with energy storage systems are designed to enable a community to achieve optimal demand side energy management.
The proposed models aim to improve the utilization of the demand side energy through load management programs including peak shaving, load shifting, and valley lling. First, a model is proposed to nd the optimal capacity of the battery energy storage system (BESS) to …
Hydrolytic And Nonhydrolytic Sol-Gel Zirconia-, Titania-, And Niobia-Based Capillary Microextraction Coatings For The Preconcentration And Hplc Analysis Of Catecholamine Neurotransmitters And Phosphorylated Peptides, Abdullah Awadh Alhendal
Hydrolytic And Nonhydrolytic Sol-Gel Zirconia-, Titania-, And Niobia-Based Capillary Microextraction Coatings For The Preconcentration And Hplc Analysis Of Catecholamine Neurotransmitters And Phosphorylated Peptides, Abdullah Awadh Alhendal
USF Tampa Graduate Theses and Dissertations
Sample preparation is the most error-prone step in chemical analysis. A great deal of efforts has been made to develop efficient techniques and protocols for sample preparation to accomplish important goals such as miniaturization and implementation of green analytical methodologies. Solid-phase microextraction (SPME) has successfully eliminated the use of hazardous organic solvents in extraction sampling, sample preparation, preconcentration and sample introduction to the analytical instrument in an effective manner. Ensuring thermal- and solvent-instability of traditional SPME extraction phases represented one of their main drawbacks. This was solved by the introduction of sol-gel SPME phases characterized by enhanced thermal-, solvent-, and …
Surface Properties Of Titanium Dioxide And Its Structural Modifications By Reactions With Transition Metals, Sandamali Halpegamage
Surface Properties Of Titanium Dioxide And Its Structural Modifications By Reactions With Transition Metals, Sandamali Halpegamage
USF Tampa Graduate Theses and Dissertations
Surfaces of metal oxides play a vital role in many technologically important applications. The surfaces of titanium dioxide, in particular, show quite promising properties that can be utilized in solid-state gas sensing and photocatalysis applications. In the first part of this dissertation we investigate these properties of TiO2 surfaces through a vigorous surface scientific approach. In the second part, we investigate the possibilities of modifying the TiO2 surfaces by depositing multi-component transition metal oxide monolayers so that the properties of bare TiO2 surface can be influenced in a beneficial way. For instance, via formation of new surface …
Towards Computational Human Behavior Modeling For Just-In-Time Adaptive Interventions, Tylar Murray
Towards Computational Human Behavior Modeling For Just-In-Time Adaptive Interventions, Tylar Murray
USF Tampa Graduate Theses and Dissertations
The advent of powerful wearable devices and smartphones has enabled a new generation of “in-the-wild” user studies, adaptive behavioral intervention strategies, and context measurement. Though numerous proof-of-concept studies continue to push the limitations of what a behavioral scientist can do with these technologies, there remains a major methodological roadblock separating behavioral theory and application. Avatar-user interaction theory, for example, is not well defined in its formulation, and thus guidelines for intervention designers depend on heuristic methods and designer intuition. Computational modeling has been slow to move into behavioral science in general, but a growing population of behavioral scientists recognize this …
Novel Magnetic Nanostructures For Enhanced Magnetic Hyperthermia Cancer Therapy, Zohreh Nemati Porshokouh
Novel Magnetic Nanostructures For Enhanced Magnetic Hyperthermia Cancer Therapy, Zohreh Nemati Porshokouh
USF Tampa Graduate Theses and Dissertations
In this dissertation, I present the results of a systematic study on novel multifunctional nanostructure systems for magnetic hyperthermia applications. All the samples have been synthesized, structurally/magnetically characterized, and tested for magnetic hyperthermia treatment at the Functional Materials Laboratory of the University South Florida. This work includes studies on four different systems: (i) Core/shell Fe/γ-Fe2O3 nanoparticles; (ii) Spherical and cubic exchange coupled FeO/Fe3O4 nanoparticles; (iii) Fe3O4 nano-octopods with different sizes; (iv) High aspect ratio FeCo nanowires and Fe3O4 nanorods.
In particular, we demonstrated the enhancement of the heating …
Expansion Of The Performance Capabilities Of The Usf Inhalation Challenge Chamber, Laura Riley
Expansion Of The Performance Capabilities Of The Usf Inhalation Challenge Chamber, Laura Riley
USF Tampa Graduate Theses and Dissertations
The purpose of this research was to evaluate the capability and performance of the University of South Florida’s (USF) Human Exposure Chamber (HEC) using aerosols in the thoracic range. The goals of this research were two-fold: to obtain an average particle size of 10 µm (thoracic-size range) inside the chamber during dust production and to test for evenness of dust concentration within the chamber. The USF HEC can be used for studies using gases and/or particulates. The chamber measurements are 4.16 ft x 2.67 ft x 6.75 ft, for a total volume of 75 ft3 or 2.13 m3 …
Miocene Contourite Deposition (Along-Slope) Near Desoto Canyon, Gulf Of Mexico: A Product Of An Enhanced Paleo-Loop Current, Shane Christopher Dunn
Miocene Contourite Deposition (Along-Slope) Near Desoto Canyon, Gulf Of Mexico: A Product Of An Enhanced Paleo-Loop Current, Shane Christopher Dunn
USF Tampa Graduate Theses and Dissertations
A Neogene contourite depositional system was identified and mapped along the DeSoto Slope in the northeastern Gulf of Mexico, U.S.A. A series of drift deposits comprising the larger contourite depositional system were interpreted from a 2-D industry seismic data set. The now subsurface drift deposits are adjacent to the anomalous seabed feature, the DeSoto Canyon, and these data suggest contourite deposition and ocean currents are in integral part of the canyon’s depositional history. The contourite depositional system is underlain by an extensive, middle Miocene aged, erosional unconformity formed by ocean currents. The timing of this erosional surface is in alignment …
Locomotion In Virtual Reality For Room Scale Tracked Areas, Evren Bozgeyikli
Locomotion In Virtual Reality For Room Scale Tracked Areas, Evren Bozgeyikli
USF Tampa Graduate Theses and Dissertations
In the recent years, virtual reality has been used as an effective tool for a wide range of areas such as training, rehabilitation, education and games. The affordability of the new generation headsets helped this medium to become more widespread. However, in order for virtual reality to become mainstream, more content that is specifically designed for this medium is needed. Since virtual reality is a different technology than the computer systems, different design principles may be required for these content for better user experience. One of the crucial components of virtual reality applications is locomotion, since the viewpoint of the …
An Early Paleogene Palynological Assemblage From The Sabrina Coast, East Antarctica: New Species And Implications For Depositional History, Catherine Davies Smith
An Early Paleogene Palynological Assemblage From The Sabrina Coast, East Antarctica: New Species And Implications For Depositional History, Catherine Davies Smith
USF Tampa Graduate Theses and Dissertations
Palynological analyses of 13 samples from two sediment cores retrieved from the Sabrina Coast, East Antarctica, provide the first information regarding the paleovegetation within the Aurora Subglacial Basin. The assemblages, hereafter referred to as the Sabrina Flora, are dominated by angiosperms, with complexes of Gambierina (G.) rudata and G. edwardsii representing 38–66% of the assemblage and an abundant and diverse Proteaceae component. The Sabrina Flora also includes Battenipollis sectilis, Forcipites sp. and Nothofagidites spp. (mostly belonging to the N. cf. rocaensis-flemingii complex), along with a few fern spores, including Laevigatosporites ovatus, a moderate presence of conifers, and …
An Ecosystem-Based Approach To Reef Fish Management In The Gulf Of Mexico, Michelle D. Masi
An Ecosystem-Based Approach To Reef Fish Management In The Gulf Of Mexico, Michelle D. Masi
USF Tampa Graduate Theses and Dissertations
Fisheries managers have the potential to significantly improve reef fish management in the Gulf of Mexico through the use of ecosystem-based approaches to fisheries management. Ecosystem-based approaches are needed to address the effects of fishing on trophodynamic interactions, to better account for ecosystem-scale processes in model projections, and to recognize the short and long-term biomass tradeoffs associated with making regulatory choices. My research was concentrated around three objectives: (1) characterizing the trophodynamic interactions between Gulf of Mexico fishes, in order to construct an invaluable tool (a Gulf of Mexico Atlantis model) to be used in ecological hypothesis testing and policy …
Virtual Reality Serious Games For Individuals With Autism Spectrum Disorder: Design Considerations, Lal Bozgeyikli
Virtual Reality Serious Games For Individuals With Autism Spectrum Disorder: Design Considerations, Lal Bozgeyikli
USF Tampa Graduate Theses and Dissertations
Virtual reality has been a popular training tool for individuals with Autism Spectrum Disorder (ASD) in recent years. Although virtual reality was proven to be a promising tool for individuals with ASD by many previous studies, effects of virtual reality properties on user experience is still an unexplored area. More comparison studies and reliable data are needed to identify the benefits of different VR methods and properties, and leverage the future VR systems. In this dissertation, we explored effects of virtual reality properties on user experience of high functioning individuals with ASD with four different serious game experiments. The first …
Efficiency Of An Unbalanced Design In Collecting Time To Event Data With Interval Censoring, Peiyao Cheng
Efficiency Of An Unbalanced Design In Collecting Time To Event Data With Interval Censoring, Peiyao Cheng
USF Tampa Graduate Theses and Dissertations
In longitudinal studies, the exact timing of an event often cannot be observed, and is usually detected at a subsequent visit, which is called interval censoring. Spacing of the visits is important when designing study with interval censored data. In a typical longitudinal study, the spacing of visits is usually the same across all subjects (balanced design). In this dissertation, I propose an unbalanced design: subjects at baseline are divided into a high risk group and a low risk group based on a risk factor, and the subjects in the high risk group are followed more frequently than those in …
Giant Electrorheological Fluids With Ultrahigh Electrorheological Efficiency Based On A Micro/Nano Hybrid Calcium Titanyl Oxalate Composite, Jinghua Wu, Zhenyang Song, Fenghua Liu, Jianjun Guo, Yuchuan Cheng, Shengqian Ma, Gaojie Xu
Giant Electrorheological Fluids With Ultrahigh Electrorheological Efficiency Based On A Micro/Nano Hybrid Calcium Titanyl Oxalate Composite, Jinghua Wu, Zhenyang Song, Fenghua Liu, Jianjun Guo, Yuchuan Cheng, Shengqian Ma, Gaojie Xu
Chemistry Faculty Publications
A novel micro/nanoparticle hybrid calcium titanyl oxalate electrorheological (ER) material composed of micron-sized spindly particles and nanometer-sized irregular particles was successfully fabricated. The giant ER fluid based on the composite exhibits enhanced not only yield stress but also low field-off viscosity, thereby resulting in an ultrahigh ER efficiency that greatly exceeds that of any existing giant ER (GER) material. The synergistic effect between the spindly microparticles and irregular nanoparticles discovered in this study suggests a promising method for solving the long-standing ER efficiency problems. Moreover, the one-step synthesis approach presented in this work can be readily expanded for mass production …
Development Of A Forecast Process For Meteotsunami Events In The Gulf Of Mexico, Leilani D. Paxton
Development Of A Forecast Process For Meteotsunami Events In The Gulf Of Mexico, Leilani D. Paxton
USF Tampa Graduate Theses and Dissertations
The purpose of this research was to provide a better understanding of meteotsunamis over the eastern Gulf of Mexico along the west coast of Florida and to develop a process for forecasting those events. Meteotsunami waves develop from resonant effects of strong pressure perturbations greater than 1 hPa, moving in excess of 10 m s-1, over water areas up to around 100 m in depth. Meteotsunami events over 0.3 m in height, as measured by three primary NOAA coastal tide gauges at Cedar Key, Clearwater Beach, and Naples, from 2007-2015, impact the Florida Gulf coastline several times per …
A Habitat Analysis Of Estuarine Fishes And Invertebrates, With Observations On The Effects Of Habitat-Factor Resolution, Brianna Michaud
A Habitat Analysis Of Estuarine Fishes And Invertebrates, With Observations On The Effects Of Habitat-Factor Resolution, Brianna Michaud
USF Tampa Graduate Theses and Dissertations
Between 1988 and 2014, otter trawls, seine nets, and plankton nets were deployed along the salinity gradients of 18 estuaries by the University of South Florida and the Florida Fish and Wildlife Research Institute (FWRI, a research branch of the Florida Fish and Wildlife Conservation Commission). The purpose of these surveys was to document the responses of aquatic estuarine biota to variation in the quantity and quality of freshwater inflows that were being managed by the Southwest Florida Water Management District (SWFWMD).
In the present analyses, four community types collected by these gears were compared with a diversity of habitat …