Current Search: Division of Undergraduate Studies (x) » Department of Art (x)
Search results
Pages
- Title
- Amygdala Mechanisms Involved in Chemosensory Communication.
- Creator
-
Stroe, Ioana, Biological Science
- Abstract/Description
-
The amygdala is an almond-shaped region of the brain present in many vertebrates such as human, hamsters and mice. The amygdala is composed of several parts, of which the following are most relevant to my research: the basolateral amygdala (BLA) and the posterior medial amygdala (MeP). The BLA functions in learning and shows increased activation after the mouse has learned a behavior. The lateral paracapsular nuclei of the intercalated nucleus (ICNlpcn) project inhibitory neurons into the BLA...
Show moreThe amygdala is an almond-shaped region of the brain present in many vertebrates such as human, hamsters and mice. The amygdala is composed of several parts, of which the following are most relevant to my research: the basolateral amygdala (BLA) and the posterior medial amygdala (MeP). The BLA functions in learning and shows increased activation after the mouse has learned a behavior. The lateral paracapsular nuclei of the intercalated nucleus (ICNlpcn) project inhibitory neurons into the BLA and mediate its activity. Dopamine has been shown to inhibit the lpcn group and therefore relieve inhibition of the BLA (disinhibition). Dopamine also acts directly in the BLA to increase activation. Therefore, if a mouse is conditioned to prefer a particular odor (in this case steer urine), dopamine injection will cause an increase in BLA activation after learning due to both disinhibition and direct excitatory response. The medial posterior amygdala in the mouse mostly responds to olfactory stimuli from the same species (conspecific stimuli). The MeP is also thought to be under control of another ICN group, the caudal ICN (ICNc). If the same inhibitory relationship is seen between ICNc and MeP, the dopamine injection may cause disinhibition in the MeP and therefore the conditioned steer urine stimulus may show increased activation in the MeP despite being a stimulus from another species (heterospecific stimulus). My experiment tests whether the ICNc has inhibitory control over the MeP, and whether dopamine will cause inhibition in the ICNc and therefore cause disinhibition in the MeP.
Show less - Date Issued
- 2011
- Identifier
- FSU_migr_uhm-0040
- Format
- Thesis
- Title
- AN ACCOUNT OF MORAL STATUS FOR MACHINES.
- Creator
-
Bruno-Piverger, Randy E
- Abstract/Description
-
This thesis deals with moral status and its potential application to machines. It introduces an account of moral status and defends the claim that with the correct features a machine can have moral status. The thesis also discusses some issues involved in recognizing the non-apparent features of a machine and how we might overcome them.
- Date Issued
- 1994-11-11
- Identifier
- FSU_libsubv1_scholarship_submission_1512760047_0ae43c6c
- Format
- Thesis
- Title
- Analysis of Beta Decay Curves and Gamma-Ray Polarization from Compton Scattering Using C++ Programming.
- Creator
-
Holt, Hannah Louise
- Abstract/Description
-
One issue that arises when performing experimental nuclear physics research at different laboratories is the lack of ubiquity between programs that handle the output of the data acquisition systems. This paper presents two new C++ programs that were created specific to the XIA system at LeRoy Collins Research Laboratory. A program geared for the study of γ-ray polarization was designed and tested using data from excited Neon-20 γ emissions. Using the other new program to look at β decay, the...
Show moreOne issue that arises when performing experimental nuclear physics research at different laboratories is the lack of ubiquity between programs that handle the output of the data acquisition systems. This paper presents two new C++ programs that were created specific to the XIA system at LeRoy Collins Research Laboratory. A program geared for the study of γ-ray polarization was designed and tested using data from excited Neon-20 γ emissions. Using the other new program to look at β decay, the mean lifetime of Potassium-38 β+ decay was confirmed. Having these simple, yet specific, executables will allow individuals to study these topics in a more rigorous way.
Show less - Date Issued
- 2017-04-26
- Identifier
- FSU_libsubv1_scholarship_submission_1493351227
- Format
- Thesis
- Title
- Analysis of carbohydrates in dissolved organic matter in peat porewaters by electrospray ionization mass spectrometry.
- Creator
-
Jones, Melinda., Florida State University
- Abstract/Description
-
Vast amounts of carbon are stored in peatlands worldwide. As these reserves of organic matter slowly decompose, they release methane, carbon dioxide and other greenhouse gases to the atmosphere. The effects of global warming on the rate of organic matter decomposition in peats have come into question. To understand these effects, the behavior of organic matter, both solid and dissolved, must be understood in the context of changing thermal and hydrological conditions. This project focused on...
Show moreVast amounts of carbon are stored in peatlands worldwide. As these reserves of organic matter slowly decompose, they release methane, carbon dioxide and other greenhouse gases to the atmosphere. The effects of global warming on the rate of organic matter decomposition in peats have come into question. To understand these effects, the behavior of organic matter, both solid and dissolved, must be understood in the context of changing thermal and hydrological conditions. This project focused on carbohydrates in the dissolved organic matter (DOM) phase of peatland porewaters. Carbohydrates are an important component of DOM because they act as indicators of organic matter reactivity. This project attempted to develop a method to analyze for both free and total hydrolysable carbohydrates in porewaters from the Lake Agassiz Peatland in Northern Minnesota. Analyses were performed using a JEOL AccuTOF mass spectrometer equipped with a nano-electrospray ionization source. Because mass alone cannot distinguish isomers, this study focused on identification of carbohydrates based on class. In addition, the fragmentation patterns of each class were studied in an attempt to find a common fragment that could be used for selective ion monitoring in conjunction with liquid chromatography. While analysis of hydrolysable carbohydrates was unsuccessful, both qualitative and quantitative analysis of free carbohydrates was achieved. The results show that the concentrations of free carbohydrates increased with depth in both fen and bog systems. This may reflect the turnover of older DOM; however, future studies are necessary to confirm this hypothesis.
Show less - Date Issued
- 2009
- Identifier
- 456103327, 244554, FSDT244554, fsu:19261
- Format
- Document (PDF)
- Title
- Analysis of Chromatin Structure Indicates a Role for Fluoxetine in Altering Nucleosome Distribution.
- Creator
-
Gracia, Ely
- Abstract/Description
-
An interesting stimulus for chromatin structural changes is the generic and popular anti-depressant drug Fluoxetine, commonly known as Prozac. Generally accepted as a Selective Serotonin Reuptake Inhibitors (SSRI's), recent work has emerged suggesting that this antidepressant also functions as a Histone Deaceylase Inhibitors (HDIs). Studies have also come out indicating that Fluoxetine acts as an immunosuppressant drug. Treatment with Fluoxetine is believed to reduce the over-activation of...
Show moreAn interesting stimulus for chromatin structural changes is the generic and popular anti-depressant drug Fluoxetine, commonly known as Prozac. Generally accepted as a Selective Serotonin Reuptake Inhibitors (SSRI's), recent work has emerged suggesting that this antidepressant also functions as a Histone Deaceylase Inhibitors (HDIs). Studies have also come out indicating that Fluoxetine acts as an immunosuppressant drug. Treatment with Fluoxetine is believed to reduce the over-activation of the immune system associated with depression. We have used an innovative microarray technology to measure changes in nucleosomal positioning that stem from Fluoxetine treatment. With the use of the microarray, we were able to show that Fluoxetine regulated chromatin structure, that Fluoxetine induced nucleosomal changes show time-dependent kinetics, and targeted genes responsible for the regulation of immune system processes. These results give new and important insights into non-SSRI roles of this highly prescribed class of drugs.
Show less - Date Issued
- 2012
- Identifier
- FSU_migr_uhm-0087
- Format
- Thesis
- Title
- Analysis of Convective Transport of Biomass Burning Emissions in Southeast Asia.
- Creator
-
Ahern, Kyle, Department of Earth, Ocean and Atmospheric Sciences
- Abstract/Description
-
Biomass burning and anthropogenic emissions affect the composition of the atmosphere, thereby impacting global climate and health. Deep convective processes can loft emissions from the boundary layer into the upper troposphere or lower stratosphere (UTLS). Strong upper-level winds can potentially transport the emissions over long distances. This study focused on the deep convective transport of biomass burning emissions near the Strait of Malacca during summer. The Weather Research and...
Show moreBiomass burning and anthropogenic emissions affect the composition of the atmosphere, thereby impacting global climate and health. Deep convective processes can loft emissions from the boundary layer into the upper troposphere or lower stratosphere (UTLS). Strong upper-level winds can potentially transport the emissions over long distances. This study focused on the deep convective transport of biomass burning emissions near the Strait of Malacca during summer. The Weather Research and Forecasting (WRF) and Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT_4) models were used to investigate deep convection and the transport of emissions from fires in the region. Fire data from the Moderate-resolution Imaging Spectroradiometer (MODIS) sensors onboard the Aqua and Terra satellites provided locations of fire emissions. These fire datasets were obtained from the University of Maryland's Fire Information for Resource Management System (FIRMS). To investigate the deep convective processes thoroughly, this study used high resolution modeling (4 km grid spacing) to resolve the convection explicitly. Explicit resolution allows the thunderstorms to be simulated more realistically than would parameterization, thus making it ideal for this research. Results showed that deep convection occurring in the Strait of Malacca is driven primarily by diurnal heating patterns and the region's topography. Convection in the region is frequent and scattered, but follows a cyclic diurnal pattern: convection over land during daytime and over the Strait during nighttime. When emissions from fires encounter areas of deep convection, they are quickly lofted to the UTLS where winds then transport them elsewhere.
Show less - Date Issued
- 2013
- Identifier
- FSU_migr_uhm-0216
- Format
- Thesis
- Title
- An Analysis of Divine Command Metaethics.
- Creator
-
Herbst, Zachary P., Department of Philosophy
- Abstract/Description
-
Divine command metaethics comes in various forms. In this paper I examine three previously proposed relationships between morality and divine commands - Analysis, Causation, and Reduction - and determine that the Reduction view is most likely because it provides the best account of divine authority. I also seek to defend the view as a whole against some of the perennial objections against it, namely the arbitrariness objection, by arguing that God necessarily desires the well being of his...
Show moreDivine command metaethics comes in various forms. In this paper I examine three previously proposed relationships between morality and divine commands - Analysis, Causation, and Reduction - and determine that the Reduction view is most likely because it provides the best account of divine authority. I also seek to defend the view as a whole against some of the perennial objections against it, namely the arbitrariness objection, by arguing that God necessarily desires the well being of his creation.
Show less - Date Issued
- 2015
- Identifier
- FSU_migr_uhm-0583
- Format
- Thesis
- Title
- Analysis of DNA gyrase A and gyrase B mutations possibly associated with resistance to ciprofloxacin in deep subsurface bacteria.
- Creator
-
Swetnam, Daniele., Florida State University
- Abstract/Description
-
Several strains of bacteria that are resistant to the antibiotic ciprofloxacin were isolated from deep terrestrial subsurface sediments at the U. S. Department of Energy Hanford Site (HS) in Washington State. These bacteria were of special interest because they have never been exposed to manmade antibiotics or to genes that may have evolved in response to the use of these drugs. Having been isolated from the Earth's surface for several million years, the HS bacteria might have evolved and...
Show moreSeveral strains of bacteria that are resistant to the antibiotic ciprofloxacin were isolated from deep terrestrial subsurface sediments at the U. S. Department of Energy Hanford Site (HS) in Washington State. These bacteria were of special interest because they have never been exposed to manmade antibiotics or to genes that may have evolved in response to the use of these drugs. Having been isolated from the Earth's surface for several million years, the HS bacteria might have evolved and possess novel resistance mechanisms. Ciprofloxacin resistance can result from point mutations that occur in specific regions of four topoisomerase enzymes: DNA gyrase A, DNA gyrase B, topoisomerase IV C, and topoisomerase IV E. This study focused on mutations in the quinolone resistance determining regions (QRDRs) of gyrase A and gyrase B. The QRDR regions of these genes were PCR amplified and sequenced, after which the DNA sequences were converted to protein sequences. The sequences for resistant strains were compared to those of selected ciprofloxacin-sensitive strains to look for amino acid substitutions that might be resistance-conferring mutations. Several substitutions that were not present in any ciprofloxacin-sensitive strains were detected, and those that involved a marked change in the chemical nature of the amino acid at the position where the substitution occurred were identified as putative resistance-conferring mutations. Some of these mutations have been described previously, while others have not and, thus, could represent novel resistance mechanisms. Additional research will now be requited to confirm that these mutations actually do confer resistance to ciprofloxacin.
Show less - Date Issued
- 2008
- Identifier
- 471388718, 341811, FSDT341811, fsu:19380
- Format
- Document (PDF)
- Title
- An analysis of election news across mediums: do structural differences between Internet and television translate into content differences?.
- Creator
-
Richard, Ashley, Florida State University
- Abstract/Description
-
The internet is quickly becoming a popular medium for political communication and with it comes a new set of structures that have the possibility to influence how political news is disseminated. Representing a traditional presence in a new medium, online versions of television news outlets (or "surrogates" such as cnn.com and abcnews.com) have expanded as popular news destinations on the internet. However, it remains to be seen how this new medium affects the news coverage presented by these...
Show moreThe internet is quickly becoming a popular medium for political communication and with it comes a new set of structures that have the possibility to influence how political news is disseminated. Representing a traditional presence in a new medium, online versions of television news outlets (or "surrogates" such as cnn.com and abcnews.com) have expanded as popular news destinations on the internet. However, it remains to be seen how this new medium affects the news coverage presented by these surrogates. To answer this question, I collected data from television news outlets, surrogate news outlets and political web-logs (blogs) for content analysis comparison. The purpose of this analysis was to determine whether surrogates look more like their mainstream news counterparts or whether the medium of the internet influences them to more closely resemble the social media news, such as blogs. What I found was that the virtually unlimited space offered by the internet allowed for an increase in interactivity, context, and reduction of game frame coverage. In contrast, journalistic norms such as objectivity and reliance on official commentators were not influenced by a change in medium. The results of this study point us to institutionalized journalism as a better predictor of what news content will look like for established news agencies. However, it also shows that the unlimited news hole of the internet may provide for increased numbers of op-ed pieces and contextual coverage over time.
Show less - Date Issued
- 2009
- Identifier
- 456438956, 244576, FSDT244576, fsu:19283
- Format
- Document (PDF)
- Title
- Analysis of GFDL Intensity Forecasting Performance for Gulf/Caribbean Major Hurricanes from 1998-2008.
- Creator
-
Hazelton, Andrew, Earth, Ocean & Atmospheric Science
- Abstract/Description
-
While both computer model and official track forecasts of Atlantic Basin hurricanes have improved significantly over the past several decades, forecasts of intensity continue to prove difficult. Even specialized hurricane models struggle with predicting intensity. This study analyzes the intensity errors of the Geophysical Fluid Dynamics Laboratory (GFDL) Hurricane Model for 19 major hurricanes over the Gulf of Mexico and Caribbean Sea from 1998 to 2008. Using the measure of skill relative to...
Show moreWhile both computer model and official track forecasts of Atlantic Basin hurricanes have improved significantly over the past several decades, forecasts of intensity continue to prove difficult. Even specialized hurricane models struggle with predicting intensity. This study analyzes the intensity errors of the Geophysical Fluid Dynamics Laboratory (GFDL) Hurricane Model for 19 major hurricanes over the Gulf of Mexico and Caribbean Sea from 1998 to 2008. Using the measure of skill relative to the Statistical Hurricane Intensity Forecast (SHIFOR), the GFDL forecasts generally improved throughout most of the 11-year period, although there were some exceptions to this increase in skill. Comparing the GFDL to the Statistical Hurricane Intensity Prediction Scheme (SHIPS), it is found that the GFDL was slightly outperformed by SHIPS on most of the forecast categories and times. It seems that there is a correlation between higher intensity storms and higher errors (R = 0.53), and there is also a clear relationship between large negative errors and rapid intensification (R = 0.62). This relationship is explored for some of the ―higher-error‖ cases by comparing the GFDL forecast intensity progression with the actual intensity change. Hurricanes Dean (2007) and Felix (2007) are also analyzed in more detail, since both of these storms were exceptions to the general trend in increased skill from 2000-2008. It is hoped that this and further analysis will illuminate reasons for the model's difficulty with the intensity forecasts, and provide a basis for improving model forecasts and official forecasts of tropical cyclone intensity.
Show less - Date Issued
- 2011
- Identifier
- FSU_migr_uhm-0014
- Format
- Thesis
- Title
- Analysis of Group Session Processes in a Faith-Based Cognitive-Behavioral Intervention for African-American Caregivers.
- Creator
-
Mendoza, Jackelynn
- Abstract/Description
-
Most adults with dementia (80%) are cared for in the home by family members referred to as caregivers. The proportion of primary family caregivers is highest in minority communities, especially African Americans. The demands of caring for a family member with dementia are typically high and have been found to lead to depression and health-related problems (e.g., new hypertension). Although several studies have shown cognitive-behavioral intervention leads to reduction of emotional distress in...
Show moreMost adults with dementia (80%) are cared for in the home by family members referred to as caregivers. The proportion of primary family caregivers is highest in minority communities, especially African Americans. The demands of caring for a family member with dementia are typically high and have been found to lead to depression and health-related problems (e.g., new hypertension). Although several studies have shown cognitive-behavioral intervention leads to reduction of emotional distress in dementia caregivers, results are inconsistent in the treatment of depressive symptoms in the African-American dementia caregiver population. Lack of cultural sensitivity and same culture providers potentially may account for diminished efficacy of cognitive-behavioral intervention in this minority group. In the present study, participants were interviewed to provide feedback on their in-session experiences of the ACTS 2 program. A qualitative analysis of caregivers’ responses were conducted to assess the group session processes. The responses were used to assess: (a) caregivers’ appraisals of the quality of interactions among their peers; (b) caregivers’ appraisals of the consequences of group skills training; and (c) caregivers’ perceptions of the effectiveness of facilitators during ACTS 2 group based sessions. Caregivers’ appraisals of these group process domains suggested the tailoring of group processes led to positive perceptions of sensitivity to cultural and spiritual values, created a sense of unity among participants and provided useful caregiving skills. Negative appraisals were case specific and were not reflective of the findings of the group as a whole. Future direction for research on group process with depressed African-American dementia caregivers are addressed.
Show less - Date Issued
- 2017-12-08
- Identifier
- FSU_libsubv1_scholarship_submission_1512762874_f38db499
- Format
- Thesis
- Title
- An Analysis of North Atlantic Tropical Cyclone Motion.
- Creator
-
Laurencin, Chelsey Nakita
- Abstract/Description
-
Tropical cyclones (TCs) have been widely researched in attempt to improve their predictability and the general atmospheric influence on their intensity and motion. This study analyzes North Atlantic TC translation in terms of the phase and strength of the El Niño Southern Oscillation (ENSO) and the Atlantic Warm Pool (AWP). The composite steering flow is also examined to consider its effect on TC geographic location and seasonality for these anomalous variations. The data is from the National...
Show moreTropical cyclones (TCs) have been widely researched in attempt to improve their predictability and the general atmospheric influence on their intensity and motion. This study analyzes North Atlantic TC translation in terms of the phase and strength of the El Niño Southern Oscillation (ENSO) and the Atlantic Warm Pool (AWP). The composite steering flow is also examined to consider its effect on TC geographic location and seasonality for these anomalous variations. The data is from the National Hurricane Center’s Hurricane Database (HURDAT) and uses 27 years of 6-hourly TC fixes from 1988 to 2014. It is found that the highest frequency of TCs occur in the speed range of 10 – 20 mi/hr for both phases of the ENSO and AWP. The fastest moving (> 55 mi/hr) TCs occur during the peak of the Atlantic hurricane season (September and October) and at latitudes between 35°N and 55°N. With regard to ENSO, cold relative to warm years showed an increase in TC frequency over all ranges of translation speed, with the largest difference for TCs traveling 10 – 20 mi/hr. The large relative to small phase of the AWP likewise showed an overall increase in TC frequency for all speed ranges, though the fractional difference between AWP phases was close in magnitude for the four most frequent speed ranges. This suggests that the AWP has a stronger influence on Atlantic TC translation than ENSO over a larger range of speeds.
Show less - Date Issued
- 2017-04-25
- Identifier
- FSU_libsubv1_scholarship_submission_1493168400
- Format
- Thesis
- Title
- An Analysis of Recent Legislation on Religious Attire in France.
- Creator
-
Ahmad, Moshtayeen, Program in International Affairs
- Abstract/Description
-
This thesis aims to situate the controversy surrounding Muslim women's attire in France in a historical context of this country, specifically the development of the French concept of laïcité. In 1905, there occurred an important development in the law, pertaining to the separation of church and state. In France, this is called laïcité and was "informed by and predicated upon French secularism and later inculcated in the ideals of French citizenship (liberté, egalité, and fraternité) through ...
Show moreThis thesis aims to situate the controversy surrounding Muslim women's attire in France in a historical context of this country, specifically the development of the French concept of laïcité. In 1905, there occurred an important development in the law, pertaining to the separation of church and state. In France, this is called laïcité and was "informed by and predicated upon French secularism and later inculcated in the ideals of French citizenship (liberté, egalité, and fraternité) through 'neutral' civic education" (Gordner 2008, 75). The relationship between the Roman Catholic Church and the state was the main reason for this judicial development that lead to laïcité. Its main purpose was to curb the influence of the Cahtolic Church in state matters. However, in the later part of the 20th century, Islam has taken the place previously associated with the Catholic Church in that its influence was seen as being in contrast with a laïque society and has become "the new focal point for the state secular policy in France" (Gordner 2008, 72). Obviously, there are far fewer Muslims in France than there were or are Catholics, but the concept of laïcité is invoked with regards to limiting certain Islamic practices in public spaces. This shift caused several tensions between French citizens and North African immigrants as France tried to preserve its traditional French culture. As a result, in 2004, a law was passed in France to ban "ostentatious religious symbols" in public schools. Even though the law applies to all religious symbols, most observers would argue that it was really intended towards Muslim girls wearing the Muslim headscarf, hijab. "The wearing of small Christian crosses, for example, is not disallowed and therefore the law can be interpreted to be directed at the wearing of the Muslim headscarf" (Gray 2008, 101). In this Honors Thesis I will explore the question if the French bans on select religious attire in public schools (2004) and the niqab in public spheres (2011) are specifically related to the religion of Islam or if other factors, such as immigration, social exclusion, "otherness" of Muslim minorities etc. play 5 a role. I also will explore the history of laïcité in France and its current application. I further my research by looking into other Francophone countries dealing with similar issues. Much research is available on the 2004 law banning ostentatious religious symbols in public schools. Since the 2011 controversy surrounding the full-face veil is relatively new, there is little scholarly research published at this time. My literature research is also limited due to the fact that I have no background in the French language. However, this topic is of interest because France has the largest Muslim minority in a Western country and therefore the way France deals with this population is of interest to other countries as well.
Show less - Date Issued
- 2012
- Identifier
- FSU_migr_uhm-0103
- Format
- Thesis
- Title
- An Analysis of Regional Politics: The Concert of Europe and the Arab League.
- Creator
-
Williams, Bailey Nichole
- Abstract/Description
-
There is scarce existing literature regarding the intersection of domestic politics and regional alliance behavior in the discipline of international relations. To comprehensively understand the dynamics of regional peace, security, and conflict, it is necessary to account for the domestic politics of states involved in regional alliances. By utilizing the Concert of Europe and the Arab League to analyze the importance of domestic politics in the formation, stability, and effectiveness of...
Show moreThere is scarce existing literature regarding the intersection of domestic politics and regional alliance behavior in the discipline of international relations. To comprehensively understand the dynamics of regional peace, security, and conflict, it is necessary to account for the domestic politics of states involved in regional alliances. By utilizing the Concert of Europe and the Arab League to analyze the importance of domestic politics in the formation, stability, and effectiveness of regional alliance systems, a coherent understanding of the hidden significance of domestic politics in regional alliance systems will emerge. By utilizing dynamic case studies, I demonstrate that favorable domestic political conditions can produce highly effective collective security agreements, while volatile domestic politics can actually increase violence amongst the members/states in regional alliance systems.
Show less - Date Issued
- 2016-04-29
- Identifier
- FSU_libsubv1_scholarship_submission_1461941005
- Format
- Thesis
- Title
- Analysis of rheological response of high molecular weight cyclic polymer melts to percolation caused by trace contamination from linear chains.
- Creator
-
Lombardo, Rafael Vasquez., FAMU-FSU College of Engineering (Tallahassee, Fla.)
- Abstract/Description
-
Melts of cyclic polymers intentionally contaminated with linear polymer fractions were studied using the bond-fluctuation model and sol-gel transition theory analysis to determine the threshold concentration at which percolation spans these melts. These results were then compared to recent experimental results that reported the threshold concentration of a sample of cyclic polystyrenes to be approximately 50 times below the overlap concentration of the chains. The experimental study mentioned...
Show moreMelts of cyclic polymers intentionally contaminated with linear polymer fractions were studied using the bond-fluctuation model and sol-gel transition theory analysis to determine the threshold concentration at which percolation spans these melts. These results were then compared to recent experimental results that reported the threshold concentration of a sample of cyclic polystyrenes to be approximately 50 times below the overlap concentration of the chains. The experimental study mentioned also attempted to explain why the threshold concentration found experimentally was that low, by suggesting that the end-to-end distance of the linear chains was a relevant factor in the capture of the surrounding cyclic chains. Our results showed some agreement with the percolation threshold values found experimentally; however, our theoretical estimations on the enhanced entrapment volume with which linear chains capture cyclic chains resulted in a concentration approximately 20 times smaller than the overlap concentration of linear chains. Our study was then expanded to look for an improved estimate of the distance required for entanglement in linear chains, this time omitting the presence of rings. Our results provide two important conclusions; first, the existence of a bridging mechanism that allows distant linear chains to interconnect by means of a common cyclic chain seems to be evident, in agreement with previous studies; second, the use of the end-to-end distance as an indicator of linear chain entanglement results in an underestimation of this condition. It is proposed that a more appropriate parameter would be the critical distance, which was found in this study to be approximately 1.09 times greater than the end-to-end distance for each chain. We also suggest that this parameter be treated as a radius rather than an end-to-end vector, in the same way as the radius of gyration is employed to calculate the overlapping concentration.
Show less - Date Issued
- 2010
- Identifier
- 645070645, 2181922, FSDT2181922, fsu:19211
- Format
- Document (PDF)
- Title
- An Analysis of Self-Employment from 2003-2013.
- Creator
-
Wilkins, Spencer, Department of Economics
- Abstract/Description
-
This paper attempts to analyze different trends in self-employment from the years 2003-2013 using data from the Current Population Survey (CPS). Self-employment can be broken down into two categories: incorporated and unincorporated self-employment. Incorporated self-employed individuals are those who have formed a legal corporation whereas unincorporated self-employed individuals have not. The reason as to why both groups are studied is, typically, those who incorporate are more...
Show moreThis paper attempts to analyze different trends in self-employment from the years 2003-2013 using data from the Current Population Survey (CPS). Self-employment can be broken down into two categories: incorporated and unincorporated self-employment. Incorporated self-employed individuals are those who have formed a legal corporation whereas unincorporated self-employed individuals have not. The reason as to why both groups are studied is, typically, those who incorporate are more entrepreneurial than those who do no incorporate. For example, an incorporated business can be an individual who starts a law firm or medical practice. The trends analyzed here are based on age, industry, and educational attainment. Age, industry, and education are very important for this analysis. Education and age have been observed in a multitude of literature on self-employment and there are observable trends, such as those who are older are more likely to be self-employed. These trends hold true in this research The Great Recession started in December of 2007 and lasted until June 2009. The major cause of this recession was the popping of the housing bubble in the United States. This led to the value of securities bound to real estate pricing in the U.S. to fall drastically, devastating financial institutions. A major contribution of this paper is to see whether the recent financial crisis had a significant impact on self-employment rates. The study is restricted to white males, ages 18-65 who are full-time employed, not in school full-time, and are in non-agricultural occupations. I perform a regression analysis to see which variables have significant effects on overall self-employment, incorporated self-employment, and unincorporated self-employment by age, industry, and educational attainment. Carrasco (1999) references a "pull" and "push" effect in regards to the business cycle and self-employment. This refers to the belief that recessions pull people into self-employment because of the lack of jobs and that booms push entrepreneurial individuals into self-employment because of a higher access to capital. The data analysis in this study finds support for the recession-pull effect on self-employment. Using transnational data, Blanchflower et al. (2001) find that (i) education and self-employment have a negative relationship, and (ii) age and self-employment have a positive relationship. Using CPS data for years 2003-2013, there is support for the second claim of Blanchflower et al., but not for the first. Additional research has shown that higher local unemployment rates lead workers to self-select into self-employment. The process is different for white and non-whites, with education being irrelevant for white self-employed workers. For nonwhites, higher education reduces the probability of entering self-employment (Rissman, 2003). High unemployment leading to start-up activity among self-employed individuals is known as the refugee effect (Thurik et al., 2008). The data analyzed indicates that education is not irrelevant for white self-employed workers; this is also concluded in Evan's and Leighton's (1989) article Some Empirical Aspects of Entrepreneurship. This paper also analyzes the trends in self-employment per industry during the recession. Industry is important to evaluate self-employment because of the 2007 financial crisis. It is expected that construction will be highly affected by this crisis. Another section in this paper is directed towards an interesting finding in the data. In the year 2013, for the first time in the years analyzed, rates for those with less than a high school diploma in unincorporated self-employment have surpassed those with a doctoral degree, becoming the most likely group to become unincorporated self-employed.
Show less - Date Issued
- 2014
- Identifier
- FSU_migr_uhm-0399
- Format
- Thesis
- Title
- Analysis of somatic driver genes in pediatric medulloblastoma.
- Creator
-
Sanchez, Kevin
- Abstract/Description
-
Medulloblastoma is the most common malignant pediatric brain tumor. The early incidence of medulloblastoma and low prevalence of germline mutations suggest that somatic mutations have a significant effect on medulloblastoma development. This thesis focuses on the analysis of somatic driver genes to identify aberrant pathways contributing to the genetic architecture of medulloblastoma incidence. These signaling pathways were determined through gene set enrichment analysis on the...
Show moreMedulloblastoma is the most common malignant pediatric brain tumor. The early incidence of medulloblastoma and low prevalence of germline mutations suggest that somatic mutations have a significant effect on medulloblastoma development. This thesis focuses on the analysis of somatic driver genes to identify aberrant pathways contributing to the genetic architecture of medulloblastoma incidence. These signaling pathways were determined through gene set enrichment analysis on the medulloblastoma driver genes. Additionally, single nucleotide variant data was utilized to generate medulloblastoma’s mutational profile to understand the mutational processes that contribute to its development. In SHH-activated medulloblastoma, the contribution of somatic driver genes to the activation of the SHH pathway was inconclusive. In contrast, the Wnt signaling pathway in Wnt-activated medulloblastoma was significantly upregulated by somatic driver gene mutations. In Group 3 medulloblastoma, gain-of-function mutations in an inhibitor of pro-inflammatory cytokines, HIVEP3, could aid in explaining the poor prognosis of this subgroup. Group 4 medulloblastoma samples had driver gene mutations in molecules that may activate the Wnt pathway but inhibit the SHH pathway. Analysis of medulloblastoma’s mutational profile demonstrated an abundance of cytosine to thymine transitions. Decomposition of this profile into known mutational signatures revealed two significant mutational processes: spontaneous deamination of 5-methylcytosine and defective DNA mismatch repair. Understanding the genetic architecture of medulloblastoma through the analysis of somatic driver gene mutations and aberrant signaling pathways may help in revealing the molecular mechanisms of these tumors that ultimately assist in the development of drugs for targeted therapy.
Show less - Date Issued
- 2018-04-09
- Identifier
- FSU_libsubv1_scholarship_submission_1523308354_0d88377b
- Format
- Thesis
- Title
- An Analysis of the Extratropical Flow Response to Recurving Atlantic Tropical Cyclones.
- Creator
-
Brannan, Allison, Department of Earth, Ocean and Atmospheric Sciences
- Abstract/Description
-
There is a significant frequency of Atlantic tropical cyclones that complete extratropical transition and recurve in the mid-latitudes. Using a climatological approach, this study will analyze the extratropical flow response to recurving Atlantic tropical cyclones and compare the results to those from the Western North Pacific, as examined by Archambault et al. (2013). This investigation includes 54 recurving Atlantic tropical cyclones occurring between 2007 and 2013. The extratropical flow...
Show moreThere is a significant frequency of Atlantic tropical cyclones that complete extratropical transition and recurve in the mid-latitudes. Using a climatological approach, this study will analyze the extratropical flow response to recurving Atlantic tropical cyclones and compare the results to those from the Western North Pacific, as examined by Archambault et al. (2013). This investigation includes 54 recurving Atlantic tropical cyclones occurring between 2007 and 2013. The extratropical flow response will be quantified using potential vorticity. Characteristics of tropical cyclones, the extratropical jet stream, and the dynamical "phasing" of their interaction will be examined to determine the features that lead to significantly amplified extratropical flow. Results show the extratropical flow to be insensitive to the wind speed, latitude, and month of recurvature. However, there is an association between low mean sea level pressure and a larger amplification of flow. Finally, tropical cyclones recurving on the east side of the nearest trough are shown to have "favorable phasing," which yields amplification of the extratropical flow.
Show less - Date Issued
- 2015
- Identifier
- FSU_migr_uhm-0538
- Format
- Thesis
- Title
- An analysis of the intrinsic and extrinsic forms in the four novels of Ford Madox Ford's, Parade's End, consisting of: Some Do Not..., No More Parades, A Man Could Stand Up - and Last Post.
- Creator
-
Pittam, Jerry Lee
- Date Issued
- 1968
- Identifier
- 159369, FSDT159369, fsu:18395
- Format
- Document (PDF)
- Title
- An analysis of the physical mechanisms contributing to Hurricane Andrew's track.
- Creator
-
Molina, Maria, Florida State University
- Abstract/Description
-
Hurricane Andrew was the second-most-destructive hurricane in the history of the United States, reaching category 5 strength when it made landfall on South Florida on August 23, 1992. It affected many other areas such as the Bahamas and Louisiana with lesser, but still destructive, force. Detailed understanding of its track and the reasons behind it are useful for future tracking of hurricanes. This understanding is important given that Andrew accelerated westward toward Florida unexpectedly....
Show moreHurricane Andrew was the second-most-destructive hurricane in the history of the United States, reaching category 5 strength when it made landfall on South Florida on August 23, 1992. It affected many other areas such as the Bahamas and Louisiana with lesser, but still destructive, force. Detailed understanding of its track and the reasons behind it are useful for future tracking of hurricanes. This understanding is important given that Andrew accelerated westward toward Florida unexpectedly. Improved understanding of the reasons behind hurricane motion may lead to better forecasts, more time to prepare for a storm, and possibly lowering the destruction a storm can do to a community. Hurricane Andrew was analyzed in 6 hour intervals, from its birth as a tropical depression to its death as it merged with a frontal system. Its motion vector was broken up into zonal (u) and meridional (v) components at every interval. Using the European Center Reanalysis (ERA40) to represent the environment of the hurricane, the synoptic pattern was analyzed at various levels: 850mb, 500mb, and 250mb. These analyses were produced to describe the various features that may have interacted with Andrew, such as troughs and other cyclones. These reanalyses were also used in a quantitative sense to calculate various mechanisms known to contribute to the motion of a hurricane, including the Beta drift and steering. The Beta drift, which results in part from a Coriolis gradient across a hurricane, was calculated using an estimated storm size at 850mb along with the latitude of the storm. For the steering estimation of Andrew, a layer-mean, storm-mean wind vector was calculated, again using the ERA40 winds as estimates of the actual environment of Andrew. Once the steering was estimated, vector analysis was done every 6hr to determine the residual in Andrew's motion vector when the Beta drift vector and steering vector were subtracted from the storm motion vector. This residual represents an estimate of the unexplained motion of Andrew using our current understanding, acknowledging 1) that there are several other second order mechanisms for motion and 2) the estimates produced here also were prone to many sources of error that are discussed. Finally, the temporal evolution of Andrew's various motion mechanisms are also discussed.
Show less - Date Issued
- 2008
- Identifier
- 469186795, 341756, FSDT341756, fsu:19325
- Format
- Document (PDF)