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Title: "I distinctly remember you!": an investigation of memory for faces with unusual features.
Creator: Keif, Autumn., Charles E. Schmidt College of Science, Department of Psychology
Abstract/Description: Many errors in recognition are made because various features of a stimulus are attended inefficiently. Those features are not bound together and can then be confused with other information. One of the most common types of these errors is conjunction errors. These happen when mismatched features of memories are combined to form a composite memory. This study tests how likely conjunction errors, along with other recognition errors, occur when participants watch videos of people both with and...
Show moreMany errors in recognition are made because various features of a stimulus are attended inefficiently. Those features are not bound together and can then be confused with other information. One of the most common types of these errors is conjunction errors. These happen when mismatched features of memories are combined to form a composite memory. This study tests how likely conjunction errors, along with other recognition errors, occur when participants watch videos of people both with and without unusual facial features performing actions after a week time lag. It was hypothesized that participants would falsely recognize actresses in the conjunction item condition over the other conditions. The likelihood of falsely recognizing a new person increased when presented with a feature, but the conjunction items overall were most often falsely recognized.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3342207
Subject Headings: Face perception, Human face recognition, Facial expression, Physiological aspects, Recollection (Psychology)
Format: Document (PDF)

Title: "Tiger Stripe" Phenomena in Indian River Lagoon Dolphins.
Creator: Stevens, Jessie, Lum, Bryanna, Blocker, Cameron, Ferch, Molly, Mazzoil, Marilyn S., Reif, John S., Murdoch, M. Elizabeth, Charles E. Schmidt College of Science
Abstract/Description: A previously undescribed skin abnormality, which we refer to as “tiger stripes,” has been identified in Indian River Lagoon bottlenose dolphins through photo-identification surveys. The condition presents as parallel stripes on the ventral and lateral aspects on the torso of the dolphin with varying length and depth. The condition may be indicative of rapid weight loss, similar to human "stretch marks”, debilitating illnesses resulting in emaciation or a result of starvation due to lack of...
Show moreA previously undescribed skin abnormality, which we refer to as “tiger stripes,” has been identified in Indian River Lagoon bottlenose dolphins through photo-identification surveys. The condition presents as parallel stripes on the ventral and lateral aspects on the torso of the dolphin with varying length and depth. The condition may be indicative of rapid weight loss, similar to human "stretch marks”, debilitating illnesses resulting in emaciation or a result of starvation due to lack of prey. Goals of this study were to determine if tiger stripes are: (1) a marker of rapid weight loss, (2) more prevalent in post-partum females, and to (3) examine the spatial and temporal distribution in the IRL. Preliminary findings indicate that tiger striping is a useful marker suggestive of rapid weight loss. The next phase of research is to determine if the condition can be utilized as a pre-mortem marker of emaciation in IRL dolphins.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00005212
Subject Headings: College students --Research --United States.
Format: Document (PDF)

Title: 1/f structure of temporal fluctuation in rhythm performance and rhythmic coordination.
Creator: Rankin, Summer K., Charles E. Schmidt College of Science, Center for Complex Systems and Brain Sciences
Abstract/Description: This dissertation investigated the nature of pulse in the tempo fluctuation of music performance and how people entrain with these performed musical rhythms. In Experiment 1, one skilled pianist performed four compositions with natural tempo fluctuation. The changes in tempo showed long-range correlation and fractal (1/f) scaling for all four performances. To determine whether the finding of 1/f structure would generalize to other pianists, musical styles, and performance practices, fractal...
Show moreThis dissertation investigated the nature of pulse in the tempo fluctuation of music performance and how people entrain with these performed musical rhythms. In Experiment 1, one skilled pianist performed four compositions with natural tempo fluctuation. The changes in tempo showed long-range correlation and fractal (1/f) scaling for all four performances. To determine whether the finding of 1/f structure would generalize to other pianists, musical styles, and performance practices, fractal analyses were conducted on a large database of piano performances in Experiment 3. Analyses revealed signicant long-range serial correlations in 96% of the performances. Analysis showed that the degree of fractal structure depended on piece, suggesting that there is something in the composition's musical structure which causes pianists' tempo fluctuations to have a similar degree of fractal structure. Thus, musical tempo fluctuations exhibit long-range correlations and fractal scaling. To examine how people entrain to these temporal fluctuations, a series of behavioral experiments were conducted where subjects were asked to tap the pulse (beat) to temporally fluctuating stimuli. The stimuli for Experiment 2 were musical performances from Experiment 1, with mechanical versions serving as controls. Subjects entrained to all stimuli at two metrical levels, and predicted the tempo fluctuations observed in Experiment 1. Fractal analyses showed that the fractal structure of the stimuli was reected in the inter-tap intervals, suggesting a possible relationship between fractal tempo scaling, pulse perception, and entrainment. Experiments 4-7 investigated the extent to which people use long-range correlation and fractal scaling to predict tempo fluctuations in fluctuating rhythmic sequences., Both natural and synthetic long-range correlations enabled prediction, as well as shuffled versions which contained no long-term fluctuations. Fractal structure of the stimuli was again in the inter-tap intervals, with persistence for the fractal stimuli, and antipersistence for the shuffled stimuli. 1/f temporal structure is suficient though not necessary for prediction of fluctuations in a stimulus with large temporal fluctuations.
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Date Issued: 2010
PURL: http://purl.flvc.org/FAU/2705083
Subject Headings: Music, Psychological aspects, Emotions in music, Perceptual-motor learning, Computational neuroscience, Synchronization, Musical perception
Format: Document (PDF)

Title: A comparative survey of Gopherus polyphemus hemoparasites in two differing South Florida habitats.
Creator: Cooney, Brian, Elhassani, Dana, Frazier, Evelyn, Caruso, Joseph P., Charles E. Schmidt College of Science
Abstract/Description: The gopher tortoise (Gopherus polyphemus) is a keystone species which affects the biodiversity that shares its burrow. Habitat fragmentation has led to a decline in populations within southeastern ranges. Haemogregarina (intracellular parasites) have been identified in the blood of gopher tortoises, possibly due to the lack of prescribed fires which are known to kill ticks. However, little is known about their health significance. Two study sites, Blazing Star Preserve (BSP), and Pine Jog...
Show moreThe gopher tortoise (Gopherus polyphemus) is a keystone species which affects the biodiversity that shares its burrow. Habitat fragmentation has led to a decline in populations within southeastern ranges. Haemogregarina (intracellular parasites) have been identified in the blood of gopher tortoises, possibly due to the lack of prescribed fires which are known to kill ticks. However, little is known about their health significance. Two study sites, Blazing Star Preserve (BSP), and Pine Jog Preserve (PJP), differ in their management. The goal of this study is: (1) determine, if any, haemogregarina parasitemia levels of the gopher tortoise population in each site and (2) detect any additional hemoparasite species. We hypothesize that paristemia will be higher in BSP due to increased overcrowding and lack of prescribed fires. This study will benefit current conservation and management practices for gopher tortoises and provide a baseline study for intracellular parasites.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00005182
Subject Headings: College students --Research --United States.
Format: Document (PDF)

Title: A Cross-Lingustic Analysis of Language Effects on Personality Measures in Spanish-English Bilinguals.
Creator: Gonzalez, Katherine, Velez-Uribe, Idaly, Rosselli, Monica, Charles E. Schmidt College of Science
Abstract/Description: The Big Five inventory is a 44-item scale that classifies participants based on five dimensions of personality with versions available in English and Spanish. Previous studies have found differences in BFI dimensions of Spanish-English bilinguals. We asked if Spanish-English bilinguals described themselves differently when answering in different languages. The present study investigated how Spanish-English bilinguals are classified when answering the BFI in both languages. In a cross...
Show moreThe Big Five inventory is a 44-item scale that classifies participants based on five dimensions of personality with versions available in English and Spanish. Previous studies have found differences in BFI dimensions of Spanish-English bilinguals. We asked if Spanish-English bilinguals described themselves differently when answering in different languages. The present study investigated how Spanish-English bilinguals are classified when answering the BFI in both languages. In a cross-linguistic design, we assessed a sample of Spanish-English bilinguals. We hypothesized that we would find that bilinguals would score significantly different in both languages in the dimensions of extraversion and conscientiousness, with English scores being expected to be significantly higher than Spanish scores. Results revealed significantly different scores in Spanish and English in all five dimensions of the BFI. These results emphasize the issue of language in psychological evaluations, with the possibility of language dependence skewing the results for bilingual patients.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00005193
Subject Headings: College students --Research --United States.
Format: Document (PDF)

Title: A novel method to evaluate local control of lung cancer in stereotactic body radiation therapy (SBRT) treatment using 18f-Fdg positron emission tomography (PET).
Creator: Kathriarachchi, Vindu, Shang, Charles, Charles E. Schmidt College of Science, Department of Physics
Abstract/Description: An improved method is introduced for prediction of local tumor control following lung stereotactic body radiation therapy (SBRT) for early stage non-small cell lung cancer (NSCLC) patients using 18F-fluorodeoxyglucose positron emission tomography (18F-FDG PET). A normalized background-corrected tumor maximum Standard Uptake Value (SUVcmax) is introduced using the mean uptake of adjacent aorta (SUVref), instead of the maximum uptake of lung tumor (SUVmax). This method minimizes the variations...
Show moreAn improved method is introduced for prediction of local tumor control following lung stereotactic body radiation therapy (SBRT) for early stage non-small cell lung cancer (NSCLC) patients using 18F-fluorodeoxyglucose positron emission tomography (18F-FDG PET). A normalized background-corrected tumor maximum Standard Uptake Value (SUVcmax) is introduced using the mean uptake of adjacent aorta (SUVref), instead of the maximum uptake of lung tumor (SUVmax). This method minimizes the variations associated with SUVmax and objectively demonstrates a strong correlation between the low SUVcmax (< 2.5-3.0) and local control of post lung SBRT. The false positive rates of both SUVmax and SUVcmax increase with inclusion of early (<6 months) PET scans, therefore such inclusion is not recommended for assessing local tumor control of post lung SBRT.
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Date Issued: 2013
PURL: http://purl.flvc.org/fau/fd/FA0004029
Subject Headings: Cancer -- Radiotherapy, Image guided radiation therapy, Lung cancer -- Treatment, Radiopharmaceuticals, Tomography, Emission
Format: Document (PDF)

Title: Activators and repressors of transcription: using bioinformatics approaches to analyze and group human transcription factors.
Creator: Savitskaya, Ala., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Transcription factors are macromolecules that are involved in transcriptional regulation by interacting with specific DNA regions, and they can cause activation or silencing of their target genes. Gene regulation by transcriptional control explains different biological processes such as development, function, and disease. Even though transcriptional control has been of great interest for molecular biology, much still remains unknown. This study was designed to generate the most current list...
Show moreTranscription factors are macromolecules that are involved in transcriptional regulation by interacting with specific DNA regions, and they can cause activation or silencing of their target genes. Gene regulation by transcriptional control explains different biological processes such as development, function, and disease. Even though transcriptional control has been of great interest for molecular biology, much still remains unknown. This study was designed to generate the most current list of human transcription factor genes. Unique entries of transcription factor genes were collected and entered into Microsoft Office 2007 Access Database along with information about each gene. Microsoft Office 2007 Access tools were used to analyze and group collected entries according to different properties such as activator or repressor record, or presence of certain protein domains. Furthermore, protein sequence alignments of members of different groups were performed, and phylogenetic trees were used to analyze relationship between different members of each group. This work contributes to the existing knowledge of transcriptional regulation in humans.
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Date Issued: 2010
PURL: http://purl.flvc.org/FAU/1930495
Subject Headings: Transcription factors, Genetic transcription, Regulation, Cellular signal transduction, DNA microarrays, Bioinformatics
Format: Document (PDF)

Title: Activity patterns of green iguana (Iguana iguana) at Hugh Taylor Birch State Park, Fort Lauderdale, Florida.
Creator: Sekscienski, Stacey R., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Activity patterns of Iguana iguana from two locations within Hugh Taylor Birch State Park, Fort Lauderdale, Florida were documented and examined. Between May 1, 2006 to April 20, 2007, I. iguana were observed on a routine basis and activities were documented as one of six major activity categories (basking, locomotion, foraging, resting, visual signaling, and other). Data was analyzed to determine differences between activity patterns of I. iguana relative to sites, seasons, and size category...
Show moreActivity patterns of Iguana iguana from two locations within Hugh Taylor Birch State Park, Fort Lauderdale, Florida were documented and examined. Between May 1, 2006 to April 20, 2007, I. iguana were observed on a routine basis and activities were documented as one of six major activity categories (basking, locomotion, foraging, resting, visual signaling, and other). Data was analyzed to determine differences between activity patterns of I. iguana relative to sites, seasons, and size category within the park. Iguana iguana spent more time basking at Site 1 than Site 2. Size 4 animals which consisted of dominant adult males, spent more time basking than other males and adult females. Size 4 animals also spent less time foraging than hatchlings, juveniles, and other adults. These results complement the existing research on behavior of I. iguana and may be useful in determining invasive control efforts of I. iguana in Florida.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3359162
Subject Headings: Green iguana, Behavior, Adaptation (Biology)
Format: Document (PDF)

Title: Adolescent conflict with parents and friends: the role of negative affect and resolution strategy in predicting relationship impact.
Creator: Pursell, Gwen R., Charles E. Schmidt College of Science, Department of Psychology
Abstract/Description: This study examined associations between conflict affect, resolution, and relationship impact in adolescent conflicts with mothers and friends. Participants included 231 adolescents who were on average 14 years of age. Over three consecutive days, participants completed a diary study in which they reported and described conflicts with mothers and friends. Path analyses were used to examine direct and indirect associations from negative affect and resolution to relationship impact contrasting...
Show moreThis study examined associations between conflict affect, resolution, and relationship impact in adolescent conflicts with mothers and friends. Participants included 231 adolescents who were on average 14 years of age. Over three consecutive days, participants completed a diary study in which they reported and described conflicts with mothers and friends. Path analyses were used to examine direct and indirect associations from negative affect and resolution to relationship impact contrasting disagreements with mothers and disagreements with friends. Moderator analyses examined whether patterns of association differed by gender or conflict topic. Findings revealed that lower levels of negative affect and higher levels of compromise were associated with improved relations for both adolescent conflicts with mothers and friends. Mediation analyses indicated that negative affect largely accounted for the association between compromise and relationship impact. There was no difference between mother-adolescent and friend-adolescent relationships in the strength of these associations. Gender and conflict topic did not moderate these associations. These findings are consistent with a larger body of research on marital relationships, which suggests that negative affect plays a key role in predicting relationship outcomes. Specifically, it appears that regardless of the amount of compromise, it is the expression of anger that determines whether a conflict improves or worsens a relationship.
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Date Issued: 2009
PURL: http://purl.flvc.org/FAU/359927
Subject Headings: Interpersonal relationships in adolescence, Adjustment (Psychology) in adolescence, Attribution (Social psychology), Social conflict, Psychological aspects
Format: Document (PDF)

Title: Affective response and cognition in HIV.
Creator: McIntosh, Roger C., Charles E. Schmidt College of Science, Department of Psychology
Abstract/Description: Resource allocation theory, Polich (2007) suggests cortical measures may attenuate when processing demands increase. Thirteen HIV-negative women (M = 36.5) and 15 HIV-positive women (M = 36.1) infected were instructed to view neutral and negative IAPS images and then to detect rare tones in a subsequent auditory oddball task. A 2 x 2 ANOVA for the auditory P3 did not indicate a main effect for picture valence however an interaction was found between picture valence and serostatus at location...
Show moreResource allocation theory, Polich (2007) suggests cortical measures may attenuate when processing demands increase. Thirteen HIV-negative women (M = 36.5) and 15 HIV-positive women (M = 36.1) infected were instructed to view neutral and negative IAPS images and then to detect rare tones in a subsequent auditory oddball task. A 2 x 2 ANOVA for the auditory P3 did not indicate a main effect for picture valence however an interaction was found between picture valence and serostatus at location Fz, F(1,24) = 18.99, p<.001. During the visual ERP sequence an interaction between valence and serostatus was found at the Pz location, F(1,24) = 18.99, p<.001, meaning the late positive potential (LPP) was not modulated between viewing neutral and negative images in HIV-positive women. These findings suggest that the manifestation of HIV in women may alter the neural processing of emotions, though not to the detriment of a subsequent cognitive task.
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Date Issued: 2010
PURL: http://purl.flvc.org/FAU/2978989
Subject Headings: AIDS (Disease), Psychological aspects, HIV-positive persons, Mental health, Clinical health psychology, Psychophysiology, Motivation (Psychology)
Format: Document (PDF)

Title: Age-related changes in executive function and the influence of processing speed.
Creator: Jurado Noboa, Maria Beatriz., Charles E. Schmidt College of Science, Department of Psychology
Abstract/Description: Healthy aging has been associated with declines in executive functioning (EF) but it remains unclear how different subprocesses of EF are affected by age and by other possibly mediating variables. The principal aim of the present study was to investigate the effects of age and processing speed on three executive functions: set-shifting, planning, and attentional control. Four age groups (20-29 years, 60-69 years, 70-79 years, and 80-89 years) were compared on the Wisconsin Card Sorting Test ...
Show moreHealthy aging has been associated with declines in executive functioning (EF) but it remains unclear how different subprocesses of EF are affected by age and by other possibly mediating variables. The principal aim of the present study was to investigate the effects of age and processing speed on three executive functions: set-shifting, planning, and attentional control. Four age groups (20-29 years, 60-69 years, 70-79 years, and 80-89 years) were compared on the Wisconsin Card Sorting Test (WCST), the DKEFS Tower Test, the Conner's Continuous Performance Test, and a Letter comparison test of processing speed. Results suggested that increased age was associated with decreased performance on most of the studied executive measures, but not all EF are equally affected by age. A slowdown in processing speed mediates some, but not all, decrements in executive performance. The results are interpreted in light of recent neuroimaging data on age-related changes in brain functioning.
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Date Issued: 2009
PURL: http://purl.flvc.org/FAU/187213
Subject Headings: Aging, Psychological aspects, Cognitive psychology, Memory disorders in old age, Ability, Influence of age on, Context effects (Psychology), Cognition, Age factors
Format: Document (PDF)

Title: Age-related differences in friend similarity of delinquent behavior.
Creator: Richmond, Ashley D., Charles E. Schmidt College of Science, Department of Psychology
Abstract/Description: During a period of increased independence from parents, youth turn to peers for support, and consequently become more vulnerable to peer pressure (Steinberg & Silverberg, 1986). During middle adolescence, vulnerability to peer influence begins to decline (Steinberg & Monahan, 2007). Empirical research has documented this trend in vulnerability to peer pressure across adolescence, but less attention has been afforded to the age-related changes in similarity. To address this, age-related...
Show moreDuring a period of increased independence from parents, youth turn to peers for support, and consequently become more vulnerable to peer pressure (Steinberg & Silverberg, 1986). During middle adolescence, vulnerability to peer influence begins to decline (Steinberg & Monahan, 2007). Empirical research has documented this trend in vulnerability to peer pressure across adolescence, but less attention has been afforded to the age-related changes in similarity. To address this, age-related changes in peer similarity in delinquency across the adolescent years were examinded using intraclass correlations. Moderating variables, including gender, reciprocity, and closeness, and control variables, including friendship stability and romantic partner status, were examined. Results indicated an increase in friend similarity in delinquency from 5th to 7th grade and a decrease in similarity from 7th to 9th grade. Implications of this study are discussed in terms of contribution to the field and implementation of the findings.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3352828
Subject Headings: Juvenile delinquency, Social aspects, Criminal behavior, Social aspects, Interpersonal relationships in adolescence, Friendship in adolescence, Peer pressure in adolescence
Format: Document (PDF)

$Aggregation kinetics of A\U+fffd\ peptides and the inhibition effects of small molecules on A\U+fffd\ peptide aggregation$

Title: Aggregation kinetics of A\U+fffd\ peptides and the inhibition effects of small molecules on A\U+fffd\ peptide aggregation.
Creator: Hijazi, Ahmad Alex., Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
Abstract/Description: The pathology of Alzheimer's disease (AD) remains elusive. Competing evidence links amylois \U+fffd\-peptide (A\U+fffd\) amyloid formation to the phenotype of AD (1). The mechanism of amyloid fibril formation has been an ongoing investigation for many years. A\U+fffd\10-23 peptide, a fragment of A\U+fffd\1-42 peptide, contained crucial hydrophobic core residues (2). In this study, an investigation was launched to study the aggreagation process of A\U+fffd\1023 peptide and its ability to form...
Show moreThe pathology of Alzheimer's disease (AD) remains elusive. Competing evidence links amylois \U+fffd\-peptide (A\U+fffd\) amyloid formation to the phenotype of AD (1). The mechanism of amyloid fibril formation has been an ongoing investigation for many years. A\U+fffd\10-23 peptide, a fragment of A\U+fffd\1-42 peptide, contained crucial hydrophobic core residues (2). In this study, an investigation was launched to study the aggreagation process of A\U+fffd\1023 peptide and its ability to form amyloid fibrils. Furthermore, the presence of its hydrophobic core showed importance for its ability to aggregate and form amyloid fibrils. Thereafter, the inhibition of A\U+fffd\1-42 peptide aggregation was studied by using pyrimidine-based compounds. A\U+fffd\1-42 peptides, known to be neurotoxic, aggregate to form amyloid fibrils (3). This investigation may provide insight into the development of novel small molecular candidates to treat AD.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3358550
Subject Headings: Amyloid beta-protein, Proteins, Metabolism, Disorders, Prions, Alzheimer's disease
Format: Document (PDF)

Title: Agnosia.
Creator: Fentanes, Joshua, Mecoli, Maria, Angel, Nevin, Charles E. Schmidt College of Science
Abstract/Description: Developmental Agnosia is a disease where the patient is not able to recognize sensory information. It is normally caused by trauma to the brain involved in perception and memory. The three major categories of agnosia are visual, auditory, and somatosensory“The Man Who Mistook His Wife for a Hat” by Oliver Sacks is about a woman named Madeleine J. She was 60 years old in 1980 and was submitted to St. Benedict’s hospital. She was not only blind but she had cerebral palsy as well. She had...
Show moreDevelopmental Agnosia is a disease where the patient is not able to recognize sensory information. It is normally caused by trauma to the brain involved in perception and memory. The three major categories of agnosia are visual, auditory, and somatosensory“The Man Who Mistook His Wife for a Hat” by Oliver Sacks is about a woman named Madeleine J. She was 60 years old in 1980 and was submitted to St. Benedict’s hospital. She was not only blind but she had cerebral palsy as well. She had referred to her hands as useless. She could identify light, touch, pain, temperature, and passive movement in her fingers. On the other hand, she had no perception. She was unable to identify anything that was put into her hands
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00005185
Subject Headings: College students --Research --United States.
Format: Document (PDF)

Title: An algebraic attack on block ciphers.
Creator: Matheis, Kenneth., Charles E. Schmidt College of Science, Department of Mathematical Sciences
Abstract/Description: The aim of this work is to investigate an algebraic attack on block ciphers called Multiple Right Hand Sides (MRHS). MRHS models a block cipher as a system of n matrix equations Si := Aix = [Li], where each Li can be expressed as a set of its columns bi1, . . . , bisi . The set of solutions Ti of Si is dened as the union of the solutions of Aix = bij , and the set of solutions of the system S1, . . . , Sn is dened as the intersection of T1, . . . , Tn. Our main contribution is a hardware...
Show moreThe aim of this work is to investigate an algebraic attack on block ciphers called Multiple Right Hand Sides (MRHS). MRHS models a block cipher as a system of n matrix equations Si := Aix = [Li], where each Li can be expressed as a set of its columns bi1, . . . , bisi . The set of solutions Ti of Si is dened as the union of the solutions of Aix = bij , and the set of solutions of the system S1, . . . , Sn is dened as the intersection of T1, . . . , Tn. Our main contribution is a hardware platform which implements a particular algorithm that solves MRHS systems (and hence block ciphers). The case is made that the platform performs several thousand orders of magnitude faster than software, it costs less than US$1,000,000, and that actual times of block cipher breakage can be calculated once it is known how the corresponding software behaves. Options in MRHS are also explored with a view to increase its efficiency.
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Date Issued: 2010
PURL: http://purl.flvc.org/FAU/2976444
Subject Headings: Ciphers, Cryptography, Data encryption (Computer science), Computer security, Coding theory, Integrated circuits, Design and construction
Format: Document (PDF)

Title: Analysis of Kissimmee River floodplain seed dispersal for vegetation community restoration.
Creator: Mezza, Garren., Charles E. Schmidt College of Science, Center for Environmental Studies
Abstract/Description: This research examined the influence of hydrochory (seed dispersal via water), anemochory (seed dispersal via wind), and zoochory (seed dispersal by animals) on the re-establishment of the important floodplain vegetation communities of the Kissimmee River floodplain. Fifty-eight seed species were identified from 19,849 and 43, 894 seeds trapped in hydrochory traps in sites north and south of Oak Creek, respectively. Seeds trapped by anemochory were measurable but were found to be far less...
Show moreThis research examined the influence of hydrochory (seed dispersal via water), anemochory (seed dispersal via wind), and zoochory (seed dispersal by animals) on the re-establishment of the important floodplain vegetation communities of the Kissimmee River floodplain. Fifty-eight seed species were identified from 19,849 and 43, 894 seeds trapped in hydrochory traps in sites north and south of Oak Creek, respectively. Seeds trapped by anemochory were measurable but were found to be far less important than hydrochory, while results showed no evidence of zoochory .... A number of interafting factors, e.g. hydrology, lack of remnants, seed phenology, etc. are limiting the dispersal of broadleaf marsh species north of Oak Creek, delaying range, expansion, and further community restoration.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3358754
Subject Headings: Seeds, Dispersal, Floodplain ecology, Wetland restoration
Format: Document (PDF)

Title: Analyzing Changes in Salinity and Evaporation on Water Quality.
Creator: Causey, Annie, Lemos, Renata, Goordeen, Avion, Selch, Donna, Abbott, Cara J., Charles E. Schmidt College of Science
Abstract/Description: The evaporation of water in the ocean can lead to hyper salinity caused by the extra substances left behind during the process. The Florida bay is surrounded by the Florida loop current and the Florida Keys, its salinity reading has been recorded as high as 70 ppt, double the normal capacity of seawater. The bay salinity depends on the amount of fresh water released from the Everglades and the magnitude of water outputted to the Gulf of Mexico and the Atlantic Ocean, as well as the ratio...
Show moreThe evaporation of water in the ocean can lead to hyper salinity caused by the extra substances left behind during the process. The Florida bay is surrounded by the Florida loop current and the Florida Keys, its salinity reading has been recorded as high as 70 ppt, double the normal capacity of seawater. The bay salinity depends on the amount of fresh water released from the Everglades and the magnitude of water outputted to the Gulf of Mexico and the Atlantic Ocean, as well as the ratio between the amount of water evaporated and the amount of precipitates left in the remaining water pool. For this research nine saltwater treatments from 0 to 40 ppt in increments of 5 ppt were constructed to examine how evaporation rates are affected by varying salinities. During this study, data were collected from each of the nine treatments before and after evaporation. The data recorded included salinity readings, pH levels and volume of water evaporated. The analyses of this data will determine the relationship between salinity levels and evaporation rates.
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Date Issued: 2015
PURL: http://purl.flvc.org/fau/fd/FA00005180
Subject Headings: College students --Research --United States.
Format: Document (PDF)

Title: Anatomy and physiology of the elasmobranch olfactory system.
Creator: Meredith, Tricia L., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: The olfactory system is the most highly developed system for molecular sensing in vertebrates. Despite their reputation for being particularly olfactory driven, little is known about how this sense functions in elasmobranch fishes. The goal of this dissertation was to examine the morphology and physiology of elasmobranchs to compare their olfactory system with teleost fishes and more derived vertebrates. To test the hypotheses that elasmobranchs possess greater olfactory sensitivities than...
Show moreThe olfactory system is the most highly developed system for molecular sensing in vertebrates. Despite their reputation for being particularly olfactory driven, little is known about how this sense functions in elasmobranch fishes. The goal of this dissertation was to examine the morphology and physiology of elasmobranchs to compare their olfactory system with teleost fishes and more derived vertebrates. To test the hypotheses that elasmobranchs possess greater olfactory sensitivities than teleosts and that lamellar surface area is correlated to sensitivity, I compared the surface area of the olfactory lamellae and the olfactory sensitivities of five phylogenetically diverse elasmobranch species. The olfactory thresholds reported here (10-9 to 10-6 M) were comparable to those previously reported for teleosts and did not correlate with lamellar surface area. Since aquatic species are subject to similar environmental amino acid levels, they appear to have converged upon similar amino acid sensitivities. To test the hypothesis that elasmobranchs are able to detect bile salt odorants despite lacking ciliated olfactory receptor neurons (ORNs), the type of ORN that mediates bile salt detection in the teleosts, I quantified the olfactory specificity and sensitivity of two elasmobranch species to four, teleost-produced C24 bile salts. Both species responded to all four bile salts, but demonstrated smaller relative responses and less sensitivity compared to teleosts and agnathans. This may indicate that elasmobranchs don't rely on bile salts to detect teleost prey. Also, the olfactory system of elasmobranchs contains molecular olfactory receptors for bile salts independent of those that detect amino acids, similar to teleosts., In some elasmobranch species, each olfactory bulb (OB) is physically partitioned into two hemi-bulbs; however, the functional significance of this morphology is not fully understood. The organization of the OBs in three species with varying OB morphologies was examined to test the hypothesis that the elasmobranch OB is somatotopically arranged. Glomeruli in the OB received projections from ORNs in 3-4 olfactory lamellae situated immediately anterior. These results indicate a somatotopic arrangement of the elasmobranch OB, which may be unique among vertebrate olfactory systems and potentially led to the hemi-OB morphology.
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Date Issued: 2011
PURL: http://purl.flvc.org/FAU/3333058
Subject Headings: Condrichthyes, Sense organs, Condrichthyes, Physiology, Sharks, Physiology, Adaptation (Biology), Aquatic animals, Physiology
Format: Document (PDF)

Title: Anisotropic physical properties of SC-15 epoxy reinforced with magnetic nanofillers under uniform magnetic field.
Creator: Malkina, Olga, Charles E. Schmidt College of Science, Department of Physics
Abstract/Description: SC-15 epoxy is used in many industrial applications and it is well known that the mechanical and viscoelastic properties of epoxy can be signicantly enhanced when reinforced with nanofillers. In this work, SC-15 epoxy is reinforced by loading with magnetically-active nanofillers and cured in a modest magnetic field. Because of the signicant magnetic response of the nanofillers, this is a low cost and relatively easy technique for imposing a strong magnetic anisotropy to the system without the...
Show moreSC-15 epoxy is used in many industrial applications and it is well known that the mechanical and viscoelastic properties of epoxy can be signicantly enhanced when reinforced with nanofillers. In this work, SC-15 epoxy is reinforced by loading with magnetically-active nanofillers and cured in a modest magnetic field. Because of the signicant magnetic response of the nanofillers, this is a low cost and relatively easy technique for imposing a strong magnetic anisotropy to the system without the need of a superconducting magnet. It is also found that this method is an effective way of enhancing the mechanical properties of epoxy. Three systems were prepared and studied. The first is a dilute system of various concentrations of Fe2O3 nanoparticles in SC-15 epoxy. The second system is a combination of Fe2O3 nanoparticles and chemically-functionalized single-walled carbon nanotubes (SWCNT(COOH)s) in SC-15 epoxy. The third is a dilute system of SWCNT(COOH)s decorated with Fe3O4 particles t hrough a sonochemical oxidation process in SC-15 epoxy. Samples have an initial cure of 6 hrs in a magnetic led of 10 kOe followed by an additional 24 hours of post curing at room temperature. These are compared to the control samples that do not have initial field curing. Tensile and compressive stress-strain analysis of the prepared systems shows that mechanical properties such as tensile strength, tensile modulus and compressive strength are enhanced with the inclusion of these nanofillers. It is also found that there is an anisotropic enhancement of these properties with respect to the imposed curing field. An interesting phenomenon is observed with the increase in modulus of toughness and fracture strain with nanotube inclusion., These parameters are drastically enhanced after curing the systems in a magnetic field. While there is a modest shift in glass transition temperature during viscoelastic analysis, the thermal stability of the created systems is not compromised. Results of these mechanical enhancements will be compared with other nanoloading techniques from literature.
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Date Issued: 2011
PURL: http://purl.flvc.org/FAU/3332722
Subject Headings: Nanostructured materials, Epoxy resins, Composite materials, Design
Format: Document (PDF)

Title: Anterograde trophic signaling in the olfactory system: neurotrophin-3 expressed by olfactory sensory neurons is transported to target bulb neurons in adult mice.
Creator: Liu, Huan, Guthrie, Kathleen M., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: The adult rodent olfactory system provides an excellent model for the study of the developing nervous system due to its constant integration of new neurons and establishment of new synapses throughout life. This allows for adaptive structural responses to sensory experience that continuously shape functional circuits to fit the behavioral needs of the animal. The cellular mechanisms underlying the anatomical plasticity of the adult olfactory system are not well understood, but neurotrophins,...
Show moreThe adult rodent olfactory system provides an excellent model for the study of the developing nervous system due to its constant integration of new neurons and establishment of new synapses throughout life. This allows for adaptive structural responses to sensory experience that continuously shape functional circuits to fit the behavioral needs of the animal. The cellular mechanisms underlying the anatomical plasticity of the adult olfactory system are not well understood, but neurotrophins, long recognized as crucial to the early development of neuronal circuits, are attractive candidate molecules in this capacity. Brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF), two members of the neurotrophin family, have received attention in terms of their anatomical distribution and physiological functions in the olfactory system.
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Date Issued: 2012
PURL: http://purl.flvc.org/fau/fd/FA00004255
Format: Document (PDF)

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