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Articles 10561 - 10590 of 11462
Full-Text Articles in Physical Sciences and Mathematics
Distributions Of Particulate Heme B In The Atlantic And Southern Oceans- Implications For Electron Transport In Phytoplankton, Martha Gledhill, Eric P. Achterberg, David J. Honey, Maria C. Nielsdottir, Micha J.A. Rijkenberg
Distributions Of Particulate Heme B In The Atlantic And Southern Oceans- Implications For Electron Transport In Phytoplankton, Martha Gledhill, Eric P. Achterberg, David J. Honey, Maria C. Nielsdottir, Micha J.A. Rijkenberg
OES Faculty Publications
Concentrations of heme b, the iron-containing component of b-type hemoproteins, ranged from b concentrations were enhanced in the photic zone and decreased with depth. Heme b concentrations correlated positively with chlorophyll a (chl a) in the TNA (r=0.41, pb did not correlate with chl a in the IB or SS. In the IB and SS, stations with high-chlorophyll and low-nutrient (Fe and/or Si) concentrations exhibited low heme bconcentrations relative to particulate organic carbon (< 0.1 μmolmol-1, and high chl a:heme b ratios (> 500). High chl a:heme b ratios resulted from relative decreases in …
Diatom Proteomics Reveals Unique Acclimation Strategies To Mitigate Fe Limitation, Brook L. Nunn, Jessica F. Faux, Anna A. Hippman, Maria T. Maldonado, H. Rodger Harvey, David R. Goodlett, Philip W. Boyd, Robert F. Strzepek
Diatom Proteomics Reveals Unique Acclimation Strategies To Mitigate Fe Limitation, Brook L. Nunn, Jessica F. Faux, Anna A. Hippman, Maria T. Maldonado, H. Rodger Harvey, David R. Goodlett, Philip W. Boyd, Robert F. Strzepek
OES Faculty Publications
Phytoplankton growth rates are limited by the supply of iron (Fe) in approximately one third of the open ocean, with major implications for carbon dioxide sequestration and carbon (C) biogeochemistry. To date, understanding how alteration of Fe supply changes phytoplankton physiology has focused on traditional metrics such as growth rate, elemental composition, and biophysical measurements such as photosynthetic competence (Fv/Fm). Researchers have subsequently employed transcriptomics to probe relationships between changes in Fe supply and phytoplankton physiology. Recently, studies have investigated longer-term (i.e. following acclimation) responses of phytoplankton to various Fe conditions. In the present study, the coastal diatom, Thalassiosira pseudonana, …
Phytoplankton In Virginia Lakes And Reservoirs, Harold G. Marshall
Phytoplankton In Virginia Lakes And Reservoirs, Harold G. Marshall
Biological Sciences Faculty Publications
This study involves a phytoplankton summer/autumn survey in 46 Virginia lakes and reservoirs during 2010-2012. A total of 307 taxa were identified which included several filamentous and colonial cyanabacteria in bloom concentrations. With the exception of one natural lake, the other sites sampled represent impoundments created decades ago, with the majority presently classified as meso- or eutrophic. Among the cyanobacteria were 6 known toxin producers (Anabaena circinalis, Anabaena spiroides, Aphanizomenon flos-aquae, Cylindrospermopsis raciborskii, Limnothrix redekei, and Microcystis aeruginosa). The study characterizes phytoplankton populations in these aging freshwater habitats taken from a large number …
Pronounced Genetic Structure In A Highly Mobile Coral Reef Fish, Caesio Cuning, In The Coral Triangle, Amanda S. Ackiss, Shinta Pardede, Eric D. Crandall, Ma Carmen A. Ablan-Lagman, Ambariyanto, November Romena, Paul H. Barber, Kent E. Carpenter
Pronounced Genetic Structure In A Highly Mobile Coral Reef Fish, Caesio Cuning, In The Coral Triangle, Amanda S. Ackiss, Shinta Pardede, Eric D. Crandall, Ma Carmen A. Ablan-Lagman, Ambariyanto, November Romena, Paul H. Barber, Kent E. Carpenter
Biological Sciences Faculty Publications
The redbelly yellowtail fusilier Caesio cuning has a tropical Indo-West Pacific range that straddles the Coral Triangle, a region of dynamic geological history and the highest marine biodiversity on the planet. Previous genetic studies in the Coral Triangle indicate the presence of multiple limits to connectivity. However, these studies have focused almost exclusively on benthic, reef-dwelling species. Schooling, reef-associated fusiliers (Perciformes: Caesionidae) account for a sizable portion of the annual reef catch in the Coral Triangle, yet to date, there have been no indepth studies on the population structure of fusiliers or other mid-water, reef-associated planktivores across this region. We …
Ace-Fts Version 3.0 Data Set: Validation And Data Processing Update, Claire Waymark, Kaley A. Walker, Chris D. Boone, Peter F. Bernath
Ace-Fts Version 3.0 Data Set: Validation And Data Processing Update, Claire Waymark, Kaley A. Walker, Chris D. Boone, Peter F. Bernath
Chemistry & Biochemistry Faculty Publications
No abstract provided.
Interaction Mechanism Of Benzene And Phenanthrene In Condensed Organic Matter: Importance Of Adsorption (Nanopore-Filling), Ke Sun, Yong Ran, Yu Yang, Baoshan Xing, Jingdong Mao
Interaction Mechanism Of Benzene And Phenanthrene In Condensed Organic Matter: Importance Of Adsorption (Nanopore-Filling), Ke Sun, Yong Ran, Yu Yang, Baoshan Xing, Jingdong Mao
Chemistry & Biochemistry Faculty Publications
Although microporosity and surface area of natural organic matter (NOM) are crucial to mechanistic evaluation of the sorption process for nonpolar organic contaminants (NOCs), they have wrongly been estimated by the N2 adsorption technique. Nuclear magnetic resonance spectroscopy (13C NMR), and benzene, carbon dioxide, and nitrogen adsorption techniques were used to characterize structural and surface properties for different condensed NOM samples, which were related to the sorption behavior of phenanthrene (Phen). It was found that the revised Freundlich model by taking the chemical activity into account can well describe the isotherms for benzene and Phen. The benzene …
Multimodal Interaction In Ambient Intelligence Environments Using Speech, Localization And Robotics, Georgios Galatas
Multimodal Interaction In Ambient Intelligence Environments Using Speech, Localization And Robotics, Georgios Galatas
Computer Science and Engineering Dissertations
An Ambient Intelligence Environment is meant to sense and respond to the presence of people, using its embedded technology. In order to effectively sense the activities and intentions of its inhabitants, such an environment needs to utilize information captured from multiple sensors and modalities. By doing so, the interaction becomes more natural as well as accurate and robust. We have focused on 3 aspects of such an environment, using speech, localization and robotics. Speech is one of the most natural forms of communication for humans. Therefore, it can be used as one of the main information sources for deriving the …
Design And Analysis Of Location Centered Large-Scale Opportunistic Networks, Shanshan Lu
Design And Analysis Of Location Centered Large-Scale Opportunistic Networks, Shanshan Lu
Computer Science and Engineering Dissertations
With the high penetration of mobile devices and their equipments of wireless interfaces in people's lives, the development of the scenario of Opportunistic Networks(OppNets) has become available. OppNets enable transmissions by exploiting temporary wireless links and connections opportunistically arising from mobility nature of nodes. The applications of OppNets have emerged in a wide range of areas.OppNets have attracted a lot of attention from the wireless and mobile network research community, while little has been paid to the OppNets in large-scale scenario. The existing OppNets are not scaled well to large-scale area due to the high uncertainty embedded in transient contacts …
Practical End-To-End Performance Evaluation Of Backend Software Applications, Tuli Nivas
Practical End-To-End Performance Evaluation Of Backend Software Applications, Tuli Nivas
Computer Science and Engineering Dissertations
This dissertation makes contributions to four areas of performance testing - the test process itself, monitoring, automation and end-to-end performance evaluation of backend applications. The first contribution deals with the testing process. Performance testing is a key element of industrial software development, but we still encountered the following two problems. (1) While testing textbooks prescribe writing tests against performance goals, we find that it is impractical to gather from business analysts performance goals that are detailed enough for finding subtle performance bugs. (2) Once performance tests are conducted, we were asked questions such as - how do you make sure …
Toward More Composable Software-Security Policies: Tools And Techniques, Daniel Lomsak
Toward More Composable Software-Security Policies: Tools And Techniques, Daniel Lomsak
USF Tampa Graduate Theses and Dissertations
Complex software-security policies are dicult to specify, understand, and update. The
same is true for complex software in general, but while many tools and techniques exist
for decomposing complex general software into simpler reusable modules (packages, classes,
functions, aspects, etc.), few tools exist for decomposing complex security policies into simpler
reusable modules. The tools that do exist for modularizing policies either encapsulate
entire policies as atomic modules that cannot be decomposed or allow ne-grained policy
modularization but require expertise to use correctly.
This dissertation presents a policy-composition tool called PoliSeer [27, 26] and the
PoCo policy-composition software-security language. PoliSeer is …
Do Personality Tests Have A Place In Academic Preparation Of Undergradute Hospitality Students, Gunce Malan
Do Personality Tests Have A Place In Academic Preparation Of Undergradute Hospitality Students, Gunce Malan
USF Tampa Graduate Theses and Dissertations
This is a descriptive study that poses the questions and discussion regarding use of personality tests in prediction of future job performance of the current undergraduate hospitality students. A gap exists between the perception of the skills and competencies of high performers and the perception of hospitality students (Berezina et al., 2011; Malan, Berezina & Cobanoglu, 2012). The purpose of this study is to investigate if personality tests will help in predicting the success of students in their preferred job setting as compared to current high performers (managers).
The use of personality tests increased substantially after 1988, when the government …
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 …
Dynamic Processes In Network Goods: Modeling, Analysis And Applications, Arnut Paothong
Dynamic Processes In Network Goods: Modeling, Analysis And Applications, Arnut Paothong
USF Tampa Graduate Theses and Dissertations
The network externality function plays a very important role in the study of economic network industries. Moreover, the consumer group dynamic interactions coupled with network externality concept is going to play a dominant role in the network goods in the 21st century. The existing literature is stemmed on a choice of externality function with certain quantitative properties. The utility function coupled with the network externality function is used to investigate static properties of rational equilibrium. The aim of this work is to systematically initiate a development of quantitative effects of the concept of network externality and its influence on the …
Light-Environment Controls And Basal Resource Use Of Planktonic And Benthic Primary Production, Kara Radabaugh
Light-Environment Controls And Basal Resource Use Of Planktonic And Benthic Primary Production, Kara Radabaugh
USF Tampa Graduate Theses and Dissertations
Consumers in marine and estuarine environments have a strong reliance on planktonic and benthic primary production. These two basal resources form the foundation of aquatic food webs, yet the abundance of phytoplankton and benthic algae are frequently inversely related due to competition for light and nutrients. As a result, optimal habitats for benthic and planktonic consumers vary spatially and temporally. To investigate these trends, three studies were conducted focusing on light attenuation and basal resources in a bay, river, and on a continental shelf.
δ13C and δ15N stable isotopes can be used as endogenous tracers to …
Defining And Preventing Code-Injection Attacks, Donald Ray
Defining And Preventing Code-Injection Attacks, Donald Ray
USF Tampa Graduate Theses and Dissertations
This thesis shows that existing definitions of code-injection attacks (e.g., SQL-injection attacks) are flawed. The flaws make it possible for attackers to circumvent existing mechanisms, by supplying code-injecting inputs that are not recognized as such. The flaws also make it possible for benign inputs to be treated as attacks. After describing these flaws in conventional definitions of code-injection attacks, this thesis proposes a new definition, which is based on whether the symbols input to an application get used as (normal-form) values in the application's output. Because values are already fully evaluated, they cannot be considered ``code'' when injected. This simple …
Turning Water Into Wine: The Political Economy Of The Environment In Southern California's Wine Country, Jason Simms
Turning Water Into Wine: The Political Economy Of The Environment In Southern California's Wine Country, Jason Simms
USF Tampa Graduate Theses and Dissertations
This dissertation examines questions of water sustainability in contexts of wine production and state-led neoliberal development in the Temecula Valley, southern California, where wine tourism is at present being harnessed as an engine of economic growth. Natural and anthropogenic forces, such as global climate change, desertification, urban development, and the marketization and commodification of natural resources, affect the distribution and availability of water throughout the globe. As a result, the use of water, and associated political and environmental processes and consequences, in the production of global commodities, including wheat, citrus, and coffee, recently have come under increased scrutiny. Given wine's …
Asymmetric Nitrene Transfer Reactions With Azides Via Co(Ii)-Based Metalloradical Catalysis (Mrc), Jingran Tao
Asymmetric Nitrene Transfer Reactions With Azides Via Co(Ii)-Based Metalloradical Catalysis (Mrc), Jingran Tao
USF Tampa Graduate Theses and Dissertations
Asymmetric nitrene transfer reactions via metalloradical catalysis (MRC) with
azides has attracted research interest because of its fundamental and practical importance.
The resulting nitrogen-containing units are recurrent motifs in biologically important
molecules and can serve as versatile precursors in organic synthesis.
The [Co(D2-Por*)] have emerged as a new class of catalysts for asymmetric
aziridination and C-H amination. These metalloradical catalysts have been shown to be
highly effective for the asymmetric intermolecular aziridination of a broad scope of
substrates with different classes of azides with excellent to good enantioselectivity. The
intramolecular C-H amination utilizing various azides can allow for the construction …
Automatic Identification Of Points Of Interest In Global Navigation Satellite System Data: A Spatial Temporal Approach, Khoa Anh Tran
Automatic Identification Of Points Of Interest In Global Navigation Satellite System Data: A Spatial Temporal Approach, Khoa Anh Tran
USF Tampa Graduate Theses and Dissertations
In addition to the emergence of smartphones and tablets in recent years, the rise of Global Navigation Satellite Systems (GNSS) has allowed mobile tracking applications to become popular and be put into many uses. Analyzing tracking records to identify points of interest (POIs) is useful for both prediction applications and research such as human behavior analysis, transportation planning, and especially travel surveys. Past research in travel surveys has shown that a GPS mobile phone-based survey is a useful tool for collecting information about individuals. Moreover, a passive travel survey collection is preferred to an active travel survey method by the …
Flexible Urban Water Distribution Systems, Seneshaw Amare Tsegaye
Flexible Urban Water Distribution Systems, Seneshaw Amare Tsegaye
USF Tampa Graduate Theses and Dissertations
With increasing global change pressures such as urbanization and climate change, cities of the future will experience difficulties in efficiently managing scarcer and less reliable water resources. However, projections of future global change pressures are plagued with uncertainties. This increases the difficulty in developing urban water systems that are adaptable to future uncertainty.
A major component of an urban water system is the distribution system, which constitutes approximately 80-85% of the total cost of the water supply system (Swamee and Sharma, 2008). Traditionally, water distribution systems (WDS) are designed using deterministic assumptions of main model input variables such as water …
Boolean Partition Algebras, Joseph Anthony Van Name
Boolean Partition Algebras, Joseph Anthony Van Name
USF Tampa Graduate Theses and Dissertations
A Boolean partition algebra is a pair $(B,F)$ where $B$ is a Boolean
algebra and $F$ is a filter on the semilattice of partitions of $B$ where $\bigcup F=B\setminus\{0\}$. In this dissertation, we shall investigate the algebraic theory of Boolean partition algebras and their connection with uniform spaces. In particular, we shall show that the category of complete non-Archimedean uniform spaces
is equivalent to a subcategory of the category of Boolean partition algebras, and notions such as supercompleteness
of non-Archimedean uniform spaces can be formulated in terms of Boolean partition algebras.
Algorithms And Data Structures For Efficient Timing Analysis Of Asynchronous Real-Time Systems, Yingying Zhang
Algorithms And Data Structures For Efficient Timing Analysis Of Asynchronous Real-Time Systems, Yingying Zhang
USF Tampa Graduate Theses and Dissertations
This thesis presents a framework to verify asynchronous real-time systems based on model checking. These systems are modeled by using a common modeling formalism named Labeled Petri-nets(LPNs).
In order to verify the real-time systems algorithmically, the zone-based timing analysis method is used for LPNs. It searches the state space with timing information (represented by zones). When there is a high degree of concurrency in the model, firing concurrent enabled transitions in different order may result in different zones, and these zones may be combined without affecting the verification result. Since the zone-based method could not deal with this problem efficiently, …
Statistical Topics Applied To Pressure And Temperature Readings In The Gulf Of Mexico, Malena Kathleen Allison
Statistical Topics Applied To Pressure And Temperature Readings In The Gulf Of Mexico, Malena Kathleen Allison
USF Tampa Graduate Theses and Dissertations
The field of statistical research in weather allows for the application of old and new methods, some of which may describe relationships between certain variables better such as temperatures and pressure. The objective of this study was to apply a variety of traditional and novel statistical methods to analyze data from the National Data Buoy Center, which records among other variables barometric pressure, atmospheric temperature, water temperature and dew point temperature. The analysis included attempts to better describe and model the data as well as to make estimations for certain variables. The following statistical methods were utilized: linear regression, non-response …
Exploring Local Food System Practices And Perceptions: Insights From Florida's Snap-Authorized Farmers' Markets, Leslie Babiak
Exploring Local Food System Practices And Perceptions: Insights From Florida's Snap-Authorized Farmers' Markets, Leslie Babiak
USF Tampa Graduate Theses and Dissertations
Despite heightened interest in creating local food systems that enhance health of ecologies, economies, and all members of communities, the public space of farmers' markets is far less than inherently equitable. This is particularly concerning given America's unprecedented crisis of food hardship and related disease, which disproportionately affects lower income populations. This research addresses the social justice implications of SNAP (food stamp) operations for locally oriented food systems. Pioneering practices of three of Florida's SNAP-authorized farmers' markets, and the attitudes and behaviors of one-hundred-seventy-six market patrons, were explored through customer surveys, market manager interviews, and environmental assessments. Qualitative and quantitative …
Model Pt- And Pd-Based Electrocatalysts For Low Temperature Fuel Cells Applications, Selasi Ofoe Blavo
Model Pt- And Pd-Based Electrocatalysts For Low Temperature Fuel Cells Applications, Selasi Ofoe Blavo
USF Tampa Graduate Theses and Dissertations
In the search for alternative energy technologies, low temperature fuel cells continue to feature as technologies with the most promise for mass commercialization. Among the low temperature fuel cells, alkaline and proton exchange membrane fuel cells are the most popular. Alkaline fuel cells have typically been used for water generation as well as auxiliary power for space shuttles. Their bulkiness however makes them undesirable for other applications, especially in automobiles, where there is a great demand for alternative technologies to internal combustion engines. Proton exchange membrane fuel cells on the other hand possess numerous qualities including their compact size, high …
Analytic Functions With Real Boundary Values In Smirnov Classes EP, Lisa De Castro
Analytic Functions With Real Boundary Values In Smirnov Classes EP, Lisa De Castro
USF Tampa Graduate Theses and Dissertations
This thesis concerns the classes of analytic functions on bounded, n-connected domains known as the Smirnov classes Ep, where p > 0. Functions in these classes satisfy a certain growth condition and have a relationship to the more well known classes of functions known as the Hardy classes Hp. In this thesis I will show how the geometry of a given domain will determine the existence of non-constant analytic functions in Smirnov classes that possess real boundary values. This is a phenomenon that does not occur among functions in the Hardy classes.
The preliminary and background information …
Virtual Screening For Inhibitors Of Anti-Apoptotic Proteins: Dck, Bcl-Xl, Mcl-1, Mdmx, And Mdm2, Courtney Jerome Du Boulay
Virtual Screening For Inhibitors Of Anti-Apoptotic Proteins: Dck, Bcl-Xl, Mcl-1, Mdmx, And Mdm2, Courtney Jerome Du Boulay
USF Tampa Graduate Theses and Dissertations
←Within this dissertation the topic of virtual screening is discussed with regard to three different cancer targets and also a brief introduction of the tools used in virtual screening. In Chapter 1, the reader will be introduced to virtual screening and the programs that are used in virtual screening. In Chapter 2, the first of three projects are discussed. This project consists of the work that was done to find inhibitors of the P53 binding domain of MDMX. In this project the mobility of residues within the binding site of MDMX are discussed and the ways in which we attempted …
Optimized Correlation Of Geophysical And Geotechnical Methods In Sinkhole Investigations: Emphasizing On Spatial Variations In West-Central Florida, Henok Gidey Kiflu
Optimized Correlation Of Geophysical And Geotechnical Methods In Sinkhole Investigations: Emphasizing On Spatial Variations In West-Central Florida, Henok Gidey Kiflu
USF Tampa Graduate Theses and Dissertations
Abstract
Sinkholes and sinkhole-related features in West-Central Florida (WCF) are commonly identified using geotechnical investigations such as standard penetration test (SPT) borings and geophysical methods such as ground penetrating radar (GPR) and electrical resistivity tomography (ERT). Geophysical investigation results can be used to locate drilling and field testing sites while geotechnical investigation can be used to ground truth geophysical results. Both methods can yield complementary information. Geotechnical investigations give important information about the type of soil, groundwater level and presence of low-density soils or voids at the test location, while geophysical investigations like GPR surveys have better spatial coverage and …
Structure And Function Of Pinniped Vibrissae, Christin Taylor Murphy
Structure And Function Of Pinniped Vibrissae, Christin Taylor Murphy
USF Tampa Graduate Theses and Dissertations
The vibrissal system of pinnipeds relies on sturdy, specialized vibrissae and supporting neural architecture apparently designed for the reception of waterborne disturbances. Although it is known that pinnipeds can use their vibrissae for fine-scale tactile discrimination and hydrodynamic detection, many aspects of vibrissal function remain poorly understood. The present work examined the adaptive significance of vibrissal structure, the sensitivity of the vibrissal system, and the signals received by this system. All of these points were considered with respect to their function in hydrodynamic reception. Four methods of study: laser vibrometry, computed tomography (CT) scanning, psychophysical testing and animal-borne tagging were …
Statistical Analysis And Modeling Of Brain Tumor Data: Histology And Regional Effects, Keshav Prasad Pokhrel
Statistical Analysis And Modeling Of Brain Tumor Data: Histology And Regional Effects, Keshav Prasad Pokhrel
USF Tampa Graduate Theses and Dissertations
Comprehensive statistical models for non-normally distributed cancerous tumor sizes are
of prime importance in epidemiological studies, whereas a long term forecasting models
can facilitate in reducing complications and uncertainties of medical progress. The statistical
forecasting models are critical for a better understanding of the disease and supply
appropriate treatments. In addition such a model can be used for the allocations of budgets,
planning, control and evaluations of ongoing efforts of prevention and early detection of
the diseases.
In the present study, we investigate the effects of age, demography, and race on primary
brain tumor sizes using quantile regression methods to …
Insight Into The Use, Perception, And Value Surrounding Domestic Water In Peru: Envisioning Demand Management In An Intermittent, Small-City, Service Context, Merril Augusta Putnam
Insight Into The Use, Perception, And Value Surrounding Domestic Water In Peru: Envisioning Demand Management In An Intermittent, Small-City, Service Context, Merril Augusta Putnam
USF Tampa Graduate Theses and Dissertations
Population growth, urbanization, degrading water quality, and climate change are making management of scarce water resources an increasingly difficult task for the domestic sector. It is recognized that in order to manage urban water resources demand management is requisite. Demand management has been experimented with in large cities of developing countries but continued focus on expanding supply overshadows its potential benefits and ultimate success. In order to manage demand, it must be measured and understood. Intermittent water services are prevalent in developing countries, but unmetered domestic water use under such conditions has not been carefully studied. This study conducted 1,149 …