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Articles 1 - 21 of 21
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Interrelation Of Thermal Stimulation With Haptic Perception, Emotion, And Memory, Mehdi Hojatmadani
Interrelation Of Thermal Stimulation With Haptic Perception, Emotion, And Memory, Mehdi Hojatmadani
USF Tampa Graduate Theses and Dissertations
Haptics is an interdisciplinary field of science that deals with how humans perceive and respond to different sensory cues perceived through touch. Thermal haptics as a branch deals with how humans perceive the temperature sensation and respond to that. The process in which thermal perception occurs is well known to researchers. What seems missing in the literature is how temperature interacts or sometimes intervenes in other physiological and psychological aspects of our lives. In this research, a series of studies are presented where the main focus was how temperature and brain interact with each other to impede or enhance our …
Rainfall, Precipitation, And Drought Patterns Associated With Wintertime Transmission Of Eastern Equine Encephalitis Virus (Eeev) In Florida, Bestami Cevher
Rainfall, Precipitation, And Drought Patterns Associated With Wintertime Transmission Of Eastern Equine Encephalitis Virus (Eeev) In Florida, Bestami Cevher
USF Tampa Graduate Theses and Dissertations
Eastern Equine encephalitis virus (EEEV) is a highly pathogenic alphavirus that causes disease in humans and horses. EEEV cases are common in the eastern North America, especially in horses in the State of Florida. EEEV cases are most common in Florida during May to August but also occur year-round, unlike most other locations. According to the Florida Department of Health, 65 EEEV horse cases were documented in the winter months between 2005 and 2018. This study investigates the meteorological activities that affect the wintertime transmission of the EEEV virus to horses. In this, we examined meteorological data up to a …
Duty-Cycle Based Physical Unclonable Functions (Pufs) For Hardware Security Applications, Mahmood Javed Azhar
Duty-Cycle Based Physical Unclonable Functions (Pufs) For Hardware Security Applications, Mahmood Javed Azhar
USF Tampa Graduate Theses and Dissertations
Duty cycle and frequency are important characteristics of periodic signals that are exploited to develop a variety of application circuits in IC design. Controlling the duty cycle and frequency provides a method to develop adaptable circuits for a variety of applications. These applications range from stable on-chip clock generation circuits, on-chip voltage regulation circuits, and Physical unclonable functions for hardware security applications. Ring oscillator circuits that are developed with CMOS inverter circuits provide a simple, versatile flexible method to generated periodic signals on an IC chip. A digitally controlled ring oscillator circuit can be adapted to control its duty cycle …
Caregiver Perception And The Role Of Seasonality In Under-Five Childhood Diarrhea Incidence In Svay Rieng Province, Cambodia, Brian S. Wells
Caregiver Perception And The Role Of Seasonality In Under-Five Childhood Diarrhea Incidence In Svay Rieng Province, Cambodia, Brian S. Wells
USF Tampa Graduate Theses and Dissertations
Diarrheal disease has long been known to be a burden to children worldwide. Although child mortality rates as a result of diarrhea have decreased over the past two decades, overall diarrhea incidence has remained relatively stable. In Cambodia, diarrhea was the third most prevalent outpatient diagnosis for children under five in 2012, with a reported incidence rate of 12 per 100 children, up from 7 per 100 children in 2008 (Ministry of Planning Cambodia, 2012). Cambodia is an agricultural country with 80% of the population living in rural areas (National Institute of Statistics Ministry of Planning, 2013). Many are also …
A Study Of Corrosion Monitoring Techniques Used In Urls For Metals, Sirui Li
A Study Of Corrosion Monitoring Techniques Used In Urls For Metals, Sirui Li
USF Tampa Graduate Theses and Dissertations
With the increasing use of fission-type nuclear power generation, particularly high-levels radioactive nuclear waste are generated, so the safe use of nuclear energy requires proper disposal of high-level radioactive nuclear waste. The selected treatment method is deep geological disposal. Therefore, underground research laboratory (URL) to prepare for deep geological disposal will also be carried out. Corrosion of metallic materials, which are closely related to the safety of URL, is the focus of this research project. This study selected monitoring techniques for URL and developed a rough monitoring scheme for temperature and resistivity in URL. In this study, corrosion-temperature and corrosion-resistivity …
Formation Of Trihalomethanes (Thms) As Disinfection By-Products (Dbps) When Treated Municipal Wastewater Is Disinfected With Sodium Hypochlorite, Helene Kassouf
Formation Of Trihalomethanes (Thms) As Disinfection By-Products (Dbps) When Treated Municipal Wastewater Is Disinfected With Sodium Hypochlorite, Helene Kassouf
USF Tampa Graduate Theses and Dissertations
Disinfection is an essential process in the treatment of municipal wastewater before the treated wastewater can be discharged to the environment. Hillsborough County's Northwest Regional Water Reclamation Facility (NWRWRF) in Tampa, Florida, currently uses ultraviolet (UV) light for disinfection. However, this method has proven expensive to implement and maintain, and may not be effective if the light transmission is poor. For these reasons, Hillsborough County is considering switching from UV light to sodium hypochlorite for disinfection. However, hypochlorite (chlorine) disinfection has disadvantages as well, such as the production of disinfection by-products (DBPs) such as trihalomethanes (THM) and haloacetic acids (HAAs), …
Metabolism In Corals From Antarctica, The Deep-Sea, And The Shallow Subtropics: Contrasts In Temperature, Depth, And Light, Lara Henry
USF Tampa Graduate Theses and Dissertations
Coral habitats span the range from tropical to polar, extremely shallow to thousands of meters deep. The differences in light and temperature experienced in these varied habitats likely affect the metabolic rates of the corals residing there. The metabolism of three coral species from different habitats have been examined to elucidate the effects of these environmental parameters on metabolism, an under-studied aspect of coral biology. For all three species, measurements of oxygen uptake, ammonium excretion, and activity of the enzymes lactate dehydrogenase (LDH), malate dehydrogenase (MDH), and citrate synthase (CS) were used to characterize their metabolism. Off Florida's Gulf coast, …
Biochemical Aspects Of The Thermal Sensitivity And Energy Balance Of Polar, Tropical And Subtropical Teleosts, Eloy Martinez
Biochemical Aspects Of The Thermal Sensitivity And Energy Balance Of Polar, Tropical And Subtropical Teleosts, Eloy Martinez
USF Tampa Graduate Theses and Dissertations
The maintenance of a functional energy balance in ectothermic fauna could be challenging in a thermally disparate environment. Biochemical adaptations at the enzyme and membrane levels allows for a set compensatory mechanism that allow the individual to maintain an energetic surplus, thus allocating energy for growth and reproduction. The present work describes how the energetic machinery in the cell, particularly the mitochondrion, could be affected by temperature changes. More specifically, this work aimed to determine how environmental temperature affects the mitochondria energetic performance of fishes from disparate thermal regimes.
Mitochondrial ATP production efficiency was evaluated in fishes from polar, tropical …
A Ctd Biotag For Mid-Sized Marine Predators, Heather Broadbent
A Ctd Biotag For Mid-Sized Marine Predators, Heather Broadbent
USF Tampa Graduate Theses and Dissertations
Biologging tools for investigating the study of fine-scale linkages between animal behavior and the physical microstructure of the marine habitat are technically limited by substantial size, high cost or low sensor resolution. However, recent advances in electronic technologies and process techniques present attractive alternatives to current tag designs. Motivated by the need for a low-cost, compact CTD biotag for medium-sized marine animals, the University of South Florida Center for Ocean Technology developed a multi-sensor biotag for quantitative measurements of ocean salinity. This dissertation describes the development and performance of a novel CTD biotag used for animal-borne measurements of the physical …
Thermal Determinants Of Nest Site Selection In Loggerhead Sea Turtles, Caretta Caretta, At Casey Key, Florida, Lindsey Nicole Flynn
Thermal Determinants Of Nest Site Selection In Loggerhead Sea Turtles, Caretta Caretta, At Casey Key, Florida, Lindsey Nicole Flynn
USF Tampa Graduate Theses and Dissertations
Many environmental cues are thought to influence nest site selection by loggerhead sea turtles, Caretta caretta, and much debate exists over the possible influence of sand temperature. This study had two primary objectives: (1) to measure thermal differences across transects of a major nesting beach of Casey Key (28.7 N, 82.3 W), Florida and (2) to evaluate thermal pattern variation that influenced nesting patterns of adult female loggerhead sea turtles. A secondary objective of this study was to determine the efficacy of infrared thermometers to collect sand surface temperatures in the field.
Temperature data were collected from 145 nest …
Influence Of Temperature On Yolk Resorption By Centropomus Undecimalis Larvae, Claudia Catalina Baron-Aguilar
Influence Of Temperature On Yolk Resorption By Centropomus Undecimalis Larvae, Claudia Catalina Baron-Aguilar
USF Tampa Graduate Theses and Dissertations
In an effort to determine the optimal temperature for rearing Centropomus undecimalis larvae during the yolk resorption period, larval development was measured under four different temperature regimes (23, 25, 28 and 31 °C). The eggs were incubated at 28 °C until hatching, which occurred at about 17 hours post-fertilization. After hatching, temperatures were adjusted to the respective treatment levels. Measurements were collected from 25 individual larvae across rearing temperatures at the following pre-determined time intervals: at hatching, 24 hours post hatch (hph), 48 hph, and 72 hph. Morphometric measurements were obtained from photomicrographs, including yolk sac length and height, oil …
Diffuse Degassing And The Hydrothermal System At Masaya Volcano, Nicaragua, Sophie C. P Pearson
Diffuse Degassing And The Hydrothermal System At Masaya Volcano, Nicaragua, Sophie C. P Pearson
USF Tampa Graduate Theses and Dissertations
Hydrothermal systems change in response to volcanic activity, and in turn may be sensitive indicators of volcanic activity. Fumaroles are a surface manifestation of this interaction. We use time series of soil temperature data and numerical models of the hydrothermal system to investigate volcanic, hydrologic and geologic controls on this diffuse degassing.
Soil temperatures were measured in a low-temperature fumarole field located 3.5 km from the summit of Masaya volcano, Nicaragua. They respond rapidly, on a time scale of minutes, to changes in volcanic activity also manifested at the summit vent. The soil temperature response is repetitive and complex, and …
Analysis Of Mangrove Structure And Latitudinal Relationships On The Gulf Coast Of Peninsular Florida, Peter Novitzky
Analysis Of Mangrove Structure And Latitudinal Relationships On The Gulf Coast Of Peninsular Florida, Peter Novitzky
USF Tampa Graduate Theses and Dissertations
The coastline of Florida has been formed by geomorphic processes which have created suitable habitats for certain vegetation and organisms. One type of vegetation is the mangrove; this plant has a latitudinal range of 24° to 32° N latitude which is associated with local climatic changes (Mitsch 2000). There are three species of mangrove found in Florida: red (Rhizophora), black (Avicennia), and white (Languncularia) (USGS 2006). Mangroves have adapted overtime to live in different ecosystems which cause mangroves, along the Florida coast, of the same species not be the same.
Climatic variation causes individual mangrove trees have structural differences such …
Effects Of Geomorphic Setting On Shallow-Groundwater Exchange And Water Temperature Of Salmon-Bearing Headwater Streams Of The Lower Kenai Peninsula, Alaska, Jason C. Bellino
Effects Of Geomorphic Setting On Shallow-Groundwater Exchange And Water Temperature Of Salmon-Bearing Headwater Streams Of The Lower Kenai Peninsula, Alaska, Jason C. Bellino
USF Tampa Graduate Theses and Dissertations
Temperature is an important physical characteristic of headwater streams that controls the presence and health of juvenile salmonids. Surface water temperature is controlled by many factors including exchanges with groundwater. A study of the hydrology of wetlands associated with headwater streams on the Lower Kenai Peninsula was conducted to determine the effect of geomorphic setting on groundwater discharge to streams and ultimately on in-stream water temperature. Attention was focused on drainage-way and discharge slope wetlands as two end-members of the geomorphic settings of the study area.
Data were collected at 18 study reaches spanning four major watersheds in the study …
Forecasting Models For Economic And Environmental Applications, Shou Hsing Shih
Forecasting Models For Economic And Environmental Applications, Shou Hsing Shih
USF Tampa Graduate Theses and Dissertations
The object of the present study is to introduce three analytical time series models for the purpose of developing more effective economic and environmental forecasting models, among others. Given a stochastic realization, stationary or nonstationary in nature, one can utilize exciting methodology to develop an autoregressive, moving average or a combination of both for short and long term forecasting. In the present study we analytically modify the stochastic realization utilizing (a) a k-th moving average, (b) a k-th weighted moving average and (c) a k-th exponential weighted moving average processes. Thus, we proceed in developing the appropriate …
Process Optimization And Consumable Development For Chemical Mechanical Planarization (Cmp) Processes, Subrahmanya R. Mudhivarthi
Process Optimization And Consumable Development For Chemical Mechanical Planarization (Cmp) Processes, Subrahmanya R. Mudhivarthi
USF Tampa Graduate Theses and Dissertations
Chemical Mechanical Planarization (CMP) is one of the most critical processing steps that enables fabrication of multilevel interconnects. The success of CMP process is limited by the implementation of an optimized process and reduction of process generated defects along with post CMP surface characteristics such as dishing and erosion. This thesis investigates to identify various sources of defects and studies the effect of factors that can be used to optimize the process. The major contributions of this work are: Understanding the effect of temperature rise on surface tribology, electrochemistry and post CMP pattern effects during the CMP process; investigating the …
Improved Techniques For Nonlinear Electrothermal Fet Modeling And Measurement Validation, Charles Passant Baylis Ii
Improved Techniques For Nonlinear Electrothermal Fet Modeling And Measurement Validation, Charles Passant Baylis Ii
USF Tampa Graduate Theses and Dissertations
Accurate transistor models are important in wireless and microwave circuit design. Large-signal field-effect transistor (FET) models are generally extracted from current-voltage (IV) characteristics, small-signal S-parameters, and large-signal measurements. This dissertation describes improved characterization and measurement validation techniques for FET models that correctly account for thermal and trapping effects.
Demonstration of a customized pulsed-bias, pulsed-RF S-parameter system constructed by the author using a traditional vector network analyzer is presented, along with the design of special bias tees to allow pulsing of the bias voltages. Pulsed IV and pulsed-bias S-parameter measurements can provide results that are electrodynamically accurate; that is, thermal and …
The Influence Of Habitat Features On Selection And Use Of A Winter Refuge By Manatees (Trichechus Manatus Latirostris) In Charlotte Harbor, Florida, Sheri L. Barton
The Influence Of Habitat Features On Selection And Use Of A Winter Refuge By Manatees (Trichechus Manatus Latirostris) In Charlotte Harbor, Florida, Sheri L. Barton
USF Tampa Graduate Theses and Dissertations
Investigating alternate winter refuges for Florida manatees is increasingly important
as sustained warm-water discharges from industrial and some natural sites becomes more
uncertain. This study examined habitat features of possible importance to manatees by
comparing a winter refuge in Charlotte Harbor, FL (the Matlacha Isles canal system) to
two nearby, seemingly similar sites that are not frequented by manatees during winter.
Water temperature, salinity, boat traffic, canal depth, and tidal flushing were assessed at
these sites. Additionally, this study examined when and how manatees use the Matlacha
Isles refuge by documenting movements, habitat use, and behaviors of manatees during
the …
Development Of A Ctd System For Environmental Measurements Using Novel Pcb Mems Fabrication Techniques, Heather Allison Broadbent
Development Of A Ctd System For Environmental Measurements Using Novel Pcb Mems Fabrication Techniques, Heather Allison Broadbent
USF Tampa Graduate Theses and Dissertations
The development of environmental continuous monitoring of physicochemical parameters via portable small and inexpensive instrumentation is an active field of research as it presents distinct challenges. The development of a PCB MEMS-based inexpensive CTD system intended for the measurement of environmental parameters in natural waters, is presented in this work. Novel PCB MEMS fabrication techniques have also been developed to construct the conductivity and temperature transducers. The design and fabrication processes are based on PCB MEMS technology that combines Cu-clad liquid crystal polymer (LCP) thin-film material with a direct write photolithography tool, chemical etching and metallization of layers of electroless …
Improved Current-Voltage Methods For Rf Transistor Characterization, Charles Passant Baylis Ii
Improved Current-Voltage Methods For Rf Transistor Characterization, Charles Passant Baylis Ii
USF Tampa Graduate Theses and Dissertations
In the development of a nonlinear transistor model, several measurements are used to extract equivalent circuit parameters. The current-voltage (IV) characteristic of a transistor is one of the measurement data sets that allows the nonlinear model parameters to be extracted. The accuracy of the IV measurement greatly influences the accuracy of the large-signal model.
Numerous works have reported the inadequacy of traditional static DC IV measurements to accurately predict radio-frequency (RF) behavior for many devices. This inaccuracy results from slow processes in the device that do not have time to completely respond to the quick changes in terminal conditions when …
Transport And Survival Of Water Quality Indicator Microorganisms In The Ground Water Environment Of Florida: Implications For Aquifer Storage And Waste Disposal, David E. John
USF Tampa Graduate Theses and Dissertations
Ground water resources are heavily used for drinking water supply and often as a receptacle for waste water. One concern is the possible contamination of wetland areas by ground water receiving septic system infiltration. To investigate this, two tracer studies were performed using the bacteriophage PRD-1 by seeding septic systems adjacent to wetlands with the phage and monitoring migration towards wetland areas. Transport velocities were evaluated based on appearance of tracer in sampling wells at various distances from the injection point. Velocities were estimated to be 0.25 m/d and 0.4 m/d at the two sites. Some retardation with respect to …