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- Title
- Brittle propensity of chromium microalloyed and corroded prestressing steel under cathodic protection.
- Creator
- Stauder, Anne-Laure T., Florida Atlantic University, Hartt, William H., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
- Abstract/Description
-
Qualification criteria for cathodic protection of pre-tensioned tendon wires in concrete were studied with regard to the risks of embrittlement due to chromium microalloying and existing corrosion damage. The selected materials included two microalloyed (with 0.23 and 0.24 w% chromium) and one non-microalloyed, high carbon prestressing steels. The slow strain rate testing technique was used to evaluate the effects of polarization to -0.90 and -1.30 VSCE upon strength and ductility of the...
Show moreQualification criteria for cathodic protection of pre-tensioned tendon wires in concrete were studied with regard to the risks of embrittlement due to chromium microalloying and existing corrosion damage. The selected materials included two microalloyed (with 0.23 and 0.24 w% chromium) and one non-microalloyed, high carbon prestressing steels. The slow strain rate testing technique was used to evaluate the effects of polarization to -0.90 and -1.30 VSCE upon strength and ductility of the steels. Fractographic analysis was performed using scanning electron microscopy. Based upon statistical analysis, an attempt was made to relate the remaining strength of the corroded wire to the extent of corrosion damage for different corrosion morphologies.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15475
- Subject Headings
- Cathodic protection, Tendons (Prestressed concrete), Steel--Corrosion, Steel--Embrittlement
- Format
- Document (PDF)
- Title
- Software reliability engineering: An evolutionary neural network approach.
- Creator
- Hochman, Robert., Florida Atlantic University, Khoshgoftaar, Taghi M.
- Abstract/Description
-
This thesis presents the results of an empirical investigation of the applicability of genetic algorithms to a real-world problem in software reliability--the fault-prone module identification problem. The solution developed is an effective hybrid of genetic algorithms and neural networks. This approach (ENNs) was found to be superior, in terms of time, effort, and confidence in the optimality of results, to the common practice of searching manually for the best-performing net. Comparisons...
Show moreThis thesis presents the results of an empirical investigation of the applicability of genetic algorithms to a real-world problem in software reliability--the fault-prone module identification problem. The solution developed is an effective hybrid of genetic algorithms and neural networks. This approach (ENNs) was found to be superior, in terms of time, effort, and confidence in the optimality of results, to the common practice of searching manually for the best-performing net. Comparisons were made to discriminant analysis. On fault-prone, not-fault-prone, and overall classification, the lower error proportions for ENNs were found to be statistically significant. The robustness of ENNs follows from their superior performance over many data configurations. Given these encouraging results, it is suggested that ENNs have potential value in other software reliability problem domains, where genetic algorithms have been largely ignored. For future research, several plans are outlined for enhancing ENNs with respect to accuracy and applicability.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15474
- Subject Headings
- Neural networks (Computer science), Software engineering, Genetic algorithms
- Format
- Document (PDF)
- Title
- Evaluation of shore protection measures applied to eroding beaches in Florida.
- Creator
- Esteves, Luciana Slomp, Florida Atlantic University, Finkl, Charles W., Department of Geosciences, Charles E. Schmidt College of Science
- Abstract/Description
-
Evaluations of shore erosion and protection in Florida are constrained by time and space. This study characterizes about 95% of Florida's beaches based on the degree of urban development, direction and rates of shoreline change, presence of sensitive ecological communities, and distribution of sea defense works. The 22 coastal-county maps prepared for this study show that approximately 195 km (16%) of Florida's beaches are eroding and 283 km (23%) are protected by engineering works. About 72%...
Show moreEvaluations of shore erosion and protection in Florida are constrained by time and space. This study characterizes about 95% of Florida's beaches based on the degree of urban development, direction and rates of shoreline change, presence of sensitive ecological communities, and distribution of sea defense works. The 22 coastal-county maps prepared for this study show that approximately 195 km (16%) of Florida's beaches are eroding and 283 km (23%) are protected by engineering works. About 72% of eroded beaches are geographically associated with inlets. Sand management at inlets is crucial to improve erosion mitigation in Florida. Suggestions designed to enhance mitigation of beach erosion are based on comparative analyses of potential environmental impacts, costs, and limitations of shore protection works. Alternative technologies that use combined techniques (i.e. bed fluidization/jet-pumps, beach nourishment/dewatering systems, or detached breakwaters) are more efficient, less expensive, and less environmentally hazardous than conventional methods.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15473
- Subject Headings
- Beach erosion--Florida, Coast changes--Florida, Shore protection--Florida, Coastal zone management--Florida
- Format
- Document (PDF)
- Title
- The relationship between memory and social judgement: A dynamical perspective.
- Creator
- Yuan, Xiaojing, Florida Atlantic University, Vallacher, Robin R.
- Abstract/Description
-
This study explored the relationship between memory and social judgment. Subjects evaluated someone who was described in both desirable and undesirable terms in a taped conversation. They used a computer mouse to express their judgments on a moment-to-moment basis for 90 sec. under one of three instructional sets: memory-based (mouse judgment upon completion of the conversation, based on their recall of information), on-line (mouse judgment while listening to the conversation), and off-line ...
Show moreThis study explored the relationship between memory and social judgment. Subjects evaluated someone who was described in both desirable and undesirable terms in a taped conversation. They used a computer mouse to express their judgments on a moment-to-moment basis for 90 sec. under one of three instructional sets: memory-based (mouse judgment upon completion of the conversation, based on their recall of information), on-line (mouse judgment while listening to the conversation), and off-line (mouse judgment upon completion of the conversation, based on their judgments formed while listening to the conversation). Half the subjects believed their judgments were relevant to the person's fate (high importance), half believed their judgments were not relevant to his fate (low importance). Subjects in the off-line/important condition demonstrated sustained oscillation in their mouse judgments throughout the judgment period in accord with dynamic integration. In all other conditions, subjects converged on a stable judgment relatively quickly, in accord with static integration.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15472
- Subject Headings
- Social values, Social perception, Memory, Judgment (Logic)
- Format
- Document (PDF)
- Title
- Cooperative federalism: Welfare reform in Florida.
- Creator
- Smart, Nicole Kimberly., Florida Atlantic University, Turner, Robyne
- Abstract/Description
-
State governments and the federal government, working together, implement more policy innovation in welfare reform. When the federal government dominated welfare policy, only three acts passed, all 20+ years apart--the 1935 Social Security Act, 1964 Economic Opportunity Act and 1988 Family Support Act. Then states, like Florida, became more involved in welfare reform through state waivers after the Family Support Act. Money, voter perceptions, and the states avoidance of becoming welfare...
Show moreState governments and the federal government, working together, implement more policy innovation in welfare reform. When the federal government dominated welfare policy, only three acts passed, all 20+ years apart--the 1935 Social Security Act, 1964 Economic Opportunity Act and 1988 Family Support Act. Then states, like Florida, became more involved in welfare reform through state waivers after the Family Support Act. Money, voter perceptions, and the states avoidance of becoming welfare magnets led to the shift of control to the states. All of their actions had to be approved by federal government state waivers. Florida, being influenced by the federal welfare dependency and culture of poverty ideologies did more in the next few years than the federal government did in the 60 years prior. The federal 1996 Welfare Reconciliation Act continues the partnership by them still working together and more policy innovation continuing to to be seen in welfare reform.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15471
- Subject Headings
- Public welfare--Florida, Federal government--United States, State governments--United States, Federal aid to public welfare--Florida, Intergovernment fiscal relations--United States
- Format
- Document (PDF)
- Title
- Religious synthesis and change in the New World: Syncretism, revitalization and conversion.
- Creator
- Selka, Stephen Lennox, Jr., Florida Atlantic University, Weiss, Gerald
- Abstract/Description
-
Cases of syncretism from the New World and other areas, with a concentration on Latin America and the Caribbean, are reviewed in order to investigate the hypothesis that structural and symbolic homologies between interacting religions are preconditions for religious syncretism. In addition, definitions and models of, as well as frameworks for, syncretism are discussed in light of the ethnographic evidence. Syncretism is also discussed with respect to both revitalization movements and the...
Show moreCases of syncretism from the New World and other areas, with a concentration on Latin America and the Caribbean, are reviewed in order to investigate the hypothesis that structural and symbolic homologies between interacting religions are preconditions for religious syncretism. In addition, definitions and models of, as well as frameworks for, syncretism are discussed in light of the ethnographic evidence. Syncretism is also discussed with respect to both revitalization movements and the recent rise of conversion to Protestantism in Latin America and the Caribbean. The discussion of syncretism and other kinds of religious change is related to various theoretical perspectives, particularly those concerning the relationship of cosmologies to the existential conditions of social life and the connection between religion and world view, attitudes, and norms.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15470
- Subject Headings
- Syncretism (Religion), Christianity and other religions, Latin America--Religion
- Format
- Document (PDF)
- Title
- Nurses' attitudes toward the care of the attempted suicide patient.
- Creator
- Schmidt, Jodie DeMay., Florida Atlantic University, Fishman, Sarah
- Abstract/Description
-
This study explored the attitudes of emergency department nurses toward the care of the attempted suicide patient. The independent variables were the ages of nurses and their length of work experience in the emergency department. One-hundred and one surveys were collected from emergency department nurses employed in three Broward County hospitals. In general, there were no significant differences between the two study groups; however, variances did appear in several areas relating to...
Show moreThis study explored the attitudes of emergency department nurses toward the care of the attempted suicide patient. The independent variables were the ages of nurses and their length of work experience in the emergency department. One-hundred and one surveys were collected from emergency department nurses employed in three Broward County hospitals. In general, there were no significant differences between the two study groups; however, variances did appear in several areas relating to knowledge about attempted suicide. The less experienced group and the younger group rated lower on these items. The nurses responding to this survey expressed generally favorable attitudes toward the care of the attempted suicide patient.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15469
- Subject Headings
- Suicide, Nurses--Attitudes
- Format
- Document (PDF)
- Title
- Theoretical studies of the mechanism of the Wittig olefination reaction.
- Creator
- Restrepo, Albeiro A., Florida Atlantic University, Mari, Frank
- Abstract/Description
-
The results we have obtained indicate that the common procedure of utilizing of the mythical Wittig half-reaction to theoretically describe the mechanism of the Wittig olefination reaction does not give consistent results when electron correlation is taken into account in the model hamiltonian. We propose that the reaction of Me3P=CH2 with formaldehyde is the smallest system that can be used to properly model the Wittig olefination reaction. The best compromise between accuracy and...
Show moreThe results we have obtained indicate that the common procedure of utilizing of the mythical Wittig half-reaction to theoretically describe the mechanism of the Wittig olefination reaction does not give consistent results when electron correlation is taken into account in the model hamiltonian. We propose that the reaction of Me3P=CH2 with formaldehyde is the smallest system that can be used to properly model the Wittig olefination reaction. The best compromise between accuracy and computational expense is to compute the molecular geometries with the HF/6-31G* methodology and the energy at the MP2/6-31G*/HF-6-31G* level. We applied the methodology that we have developed to the study of reaction of a series of stabilized, semistabilized and unstabilized ylides with acetaldehyde.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15468
- Subject Headings
- Wittig reaction, Organic compounds--Synthesis
- Format
- Document (PDF)
- Title
- Female type I diabetics with eating disorders: Purging by insulin withholding.
- Creator
- Reilly, Maureen Bridget., Florida Atlantic University, Locsin, Rozzano
- Abstract/Description
-
This study provides descriptions of experiences and characteristics of female type I diabetics with eating disorders who purge by insulin withholding. The multiple case study design was used as adapted from Yin. Four female type I diabetics with eating disorders who purge by insulin withholding were interviewed using a semi-structured interview guide. From these interviews, common themes emerged which described the experiences and characteristics of the participants. These themes were...
Show moreThis study provides descriptions of experiences and characteristics of female type I diabetics with eating disorders who purge by insulin withholding. The multiple case study design was used as adapted from Yin. Four female type I diabetics with eating disorders who purge by insulin withholding were interviewed using a semi-structured interview guide. From these interviews, common themes emerged which described the experiences and characteristics of the participants. These themes were supported by answers to questions in the ATT 39 questionnaire. Themes which emerged are: self-care deficits, anger, shame, secretiveness, guilt, hopelessness, uniqueness, depression, low self esteem, control issues, depression, and body image distortion. These themes provided contextual relevance to participants' lived experiences, interconnected dual diagnoses and the ambivalence of recovering from their eating disorder. Implications for nursing education, practice, and research are discussed.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15467
- Subject Headings
- Diabetes, Insulin, Women--Diseases, Appetite disorders
- Format
- Document (PDF)
- Title
- The effect of medroxyprogesterone (Depo-Provera) on the ovaries of captive cockatiels (Nymphicus holiandicus) during the reproductive cycle.
- Creator
- Juillerat, Dana Kale, Florida Atlantic University, Mahoney, Sheila A., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Depo-Provera, a drug manufactured by the Upjohn Company, has been used clinically to prevent egg-laying in several species of domestic birds. Two different doses of the drug plus a placebo injection of saline were administered to 54 cockatiels. All subjects appeared normal and healthy throughout the study except for two birds in the higher dose treatment which died of unknown causes. Control was studied through the direct observation of the ovary by means of laparoscopy, as well as monitoring...
Show moreDepo-Provera, a drug manufactured by the Upjohn Company, has been used clinically to prevent egg-laying in several species of domestic birds. Two different doses of the drug plus a placebo injection of saline were administered to 54 cockatiels. All subjects appeared normal and healthy throughout the study except for two birds in the higher dose treatment which died of unknown causes. Control was studied through the direct observation of the ovary by means of laparoscopy, as well as monitoring egg laying activity throughout the study. Depo-Provera at both doses tested appears to effectively decrease egg-laying activity in the captive cockatiel. All birds receiving the higher dose of Depo-Provera gained significant weight. Although the use of Depo-Provera may serve as a means of preventive medicine, there are serious side effects that should be considered.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15466
- Subject Headings
- Medroxyprogesterone, Cockatiel, Birds--Reproduction
- Format
- Document (PDF)
- Title
- Determination of wetland impact due to groundwater drawdown: The application of aerial photo-interpretation, GIS analysis, and groundwater modeling.
- Creator
- Hindle, Tobin, Florida Atlantic University, Marsh, G. Alex
- Abstract/Description
-
Aerial photo-interpretation, GIS analysis, and groundwater modeling were employed to determine the impact of permitted groundwater withdrawal, primarily for agricultural irrigation, on protected wetland communities within Jonathan Dickinson State Park (JDSP), Martin County Florida. Since 1952, much of the wetland habitat has succeeded to terrestrial pine flatwoods in the southwestern section of the wilderness preserve of JDSP. The drying trend can not be linked to natural hydrologic impact,...
Show moreAerial photo-interpretation, GIS analysis, and groundwater modeling were employed to determine the impact of permitted groundwater withdrawal, primarily for agricultural irrigation, on protected wetland communities within Jonathan Dickinson State Park (JDSP), Martin County Florida. Since 1952, much of the wetland habitat has succeeded to terrestrial pine flatwoods in the southwestern section of the wilderness preserve of JDSP. The drying trend can not be linked to natural hydrologic impact, but strongly correlates to groundwater drawdown calculated using a three-dimensional groundwater computer model.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15465
- Subject Headings
- Groundwater flow--Computer simulation, Geographic information systems, Wetland hydrology
- Format
- Document (PDF)
- Title
- Effects of daily cocaine on milk intake and motor activity in cannula-fed and bottle-fed rats.
- Creator
- Hertz, Jacqueline Moore, Florida Atlantic University, Wolgin, David L.
- Abstract/Description
-
The purpose of this experiment was to determine if tolerance to cocaine-induced hypophagia involves learning to suppress stereotyped movements that interfere with feeding. Milk intake and motor activity were measured in rats fed via bottles or intraoral cannulas. On dose-response 1, the bottle group was more hypophagic than the cannula group at the 8, 16, and 32 mg/kg doses. After 60d of chronic cocaine (16 mg/kg), only the bottle-fed group showed tolerance, indicated by a shift to the right...
Show moreThe purpose of this experiment was to determine if tolerance to cocaine-induced hypophagia involves learning to suppress stereotyped movements that interfere with feeding. Milk intake and motor activity were measured in rats fed via bottles or intraoral cannulas. On dose-response 1, the bottle group was more hypophagic than the cannula group at the 8, 16, and 32 mg/kg doses. After 60d of chronic cocaine (16 mg/kg), only the bottle-fed group showed tolerance, indicated by a shift to the right on dose-response 2. Tolerance was accompanied by a decrease in activity, while activity in the cannula-fed groups given 16 or 32 mg/kg showed sensitization. These results suggest that moderate doses of cocaine interfere with feeding primarily by producing incompatible behaviors. Tolerance involves learning to inhibit these behaviors in order to feed.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15464
- Subject Headings
- Rats as laboratory animals, Conditioned response, Drug tolerance
- Format
- Document (PDF)
- Title
- For God and country: W. T. Stead and the beginnings of the new journalism in Victorian Britain, 1883-1885.
- Creator
- Guerty, Phillip Michael., Florida Atlantic University, Frazer, Heather
- Abstract/Description
-
Since the late nineteenth century, scholars and historians have attributed the growth of a sensational press in Britain to long-term societal changes such as the rise of capitalism. What has been ignored, however, is the importance of individual initiative, mainly that of W. T. Stead of the Pall Mall Gazette. During the Sudan Crisis of 1883-1885, Stead introduced a new type of journalism to England that combined typographical innovations, such as maps and striking headlines, with a lively...
Show moreSince the late nineteenth century, scholars and historians have attributed the growth of a sensational press in Britain to long-term societal changes such as the rise of capitalism. What has been ignored, however, is the importance of individual initiative, mainly that of W. T. Stead of the Pall Mall Gazette. During the Sudan Crisis of 1883-1885, Stead introduced a new type of journalism to England that combined typographical innovations, such as maps and striking headlines, with a lively literary style. At the root of this new type of reporting were Stead's deep-felt convictions about spreading Christianity, extending the empire, and improving the world through newspapers.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15463
- Subject Headings
- Stead, W. T.--(William Thomas),--1849-1912., Journalism--Social aspects--Great Britain., English newspapers--History., Press--Great Britain--History.
- Format
- Document (PDF)
- Title
- New Age or new opiate? A cultural analysis of "The Celestine Prophecy".
- Creator
- Greenspan, Deborah Sue., Florida Atlantic University, Scodari, Christine
- Abstract/Description
-
The Celestine Prophecy is a popular new age novel which has attracted an audience numbering in the millions. Looking at this book from both the political and cultural economic perspectives allows us to analyze economic factors behind the book's production, the text itself, and the ways the audience uses the text. From these perspectives we can see what produced this cultural phenomenon, and examine alternative meanings that readers of the text may find in it. Issues of hegemony, diversity and...
Show moreThe Celestine Prophecy is a popular new age novel which has attracted an audience numbering in the millions. Looking at this book from both the political and cultural economic perspectives allows us to analyze economic factors behind the book's production, the text itself, and the ways the audience uses the text. From these perspectives we can see what produced this cultural phenomenon, and examine alternative meanings that readers of the text may find in it. Issues of hegemony, diversity and domination are explored, as is the "structure of feeling" of the text. How the audience uses or resists the ideas incorporated in the novel is also studied.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15462
- Subject Headings
- Redfield, James--Criticism and interpretation., Redfield, James.--Celestine prophecy., Communication--Political aspects--United States., Communication--Economic aspects--United States., Popular culture--United States--History--20th century.
- Format
- Document (PDF)
- Title
- Words behind writing: A feminist approach to language and liberation in Erna Brodber's "Jane and Louisa Will Soon Come Home" and "Myal".
- Creator
- Edwards, Paula Yvonne., Florida Atlantic University, Lewis, Krishnakali
- Abstract/Description
-
Ema Brodber combines sociological concerns with her creative imagination in two novels, Jane and Louisa Will Soon Come Home and Myal. Her stated aim is to provide people of the African diaspora with tools to face the world more confidently. She is particularly interested in the plight of women in postcolonial Caribbean countries whose lives are determined by imperialist and patriarchal discourses. The tools she provides are linguistic. By integrating Jamaican Creole and English Brodber enacts...
Show moreEma Brodber combines sociological concerns with her creative imagination in two novels, Jane and Louisa Will Soon Come Home and Myal. Her stated aim is to provide people of the African diaspora with tools to face the world more confidently. She is particularly interested in the plight of women in postcolonial Caribbean countries whose lives are determined by imperialist and patriarchal discourses. The tools she provides are linguistic. By integrating Jamaican Creole and English Brodber enacts her protagonists' struggles to find a language capable of expressing their reality and opposing colonizing fictions. The novels chart the transition from child to adult of two characters, Nellie and Ella. They grow up in Jamaica during the late nineteenth and early twentieth centuries. This was a time when confusing class, color and gender ideologies, promulgated by written and oral traditions, inhibited healthy identity formation. Migration to America sufficiently distances them from Jamaica to allow for an interrogation of the conflicting messages about womanhood which Jamaican society promulgates. On returning home, they learn that the imperialist and patriarchal ideals that shape society can be challenged. In particular, they realize the power of words to effect change. Through a new critical awareness born of personal experience and a revisiting of history, they also learn that Jamaican culture can nurture as well as harm them.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15461
- Subject Headings
- Brodber, Erna--Criticism and interpretation., Brodber, Erna.--Jane and Lousia will soon come home., Brodber, Erna.--Myal.
- Format
- Document (PDF)
- Title
- The impact of devaluation on the standard of living of a developing country: Tunisia.
- Creator
- Douihech, Tarek H., Florida Atlantic University, Yuhn, Ky-hyang
- Abstract/Description
-
There are conflicting theories on the effects of devaluation on economy. This thesis sets out to investigate the impact of devaluation on the standard of living of developing countries, specifically Tunisia. The results obtained from the regressions contradicted the contractionary view of devaluation. It concluded that with proper structural reforms, devaluation improves the growth rate and therefore, the standard of living of a country. Surprisingly, this negative sign of government...
Show moreThere are conflicting theories on the effects of devaluation on economy. This thesis sets out to investigate the impact of devaluation on the standard of living of developing countries, specifically Tunisia. The results obtained from the regressions contradicted the contractionary view of devaluation. It concluded that with proper structural reforms, devaluation improves the growth rate and therefore, the standard of living of a country. Surprisingly, this negative sign of government expenditure elasticity opened up the question for further research on the impact of the role and size of a government on the growth rate.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15460
- Subject Headings
- Devaluation of currency--Tunisia, Devaluation of currency--Developing countries--Tunisia, Tunisia--Economic policy, Currency question--Tunisia
- Format
- Document (PDF)
- Title
- Effects of various sand types on nest temperature and hatching success in the loggerhead (Caretta caretta) sea turtle.
- Creator
- Cheeks, Rebecca Joan., Florida Atlantic University, Lutz, Peter L.
- Abstract/Description
-
Because of the logistics involved with field experiments, most of what is known about effects of temperature on the nest environment of loggerhead (Caretta caretta) sea turtles has been learned in the laboratory. Until now, scientists have been forced to speculate on what effects different sands might have on temperature within the nest. Results of the present study indicate that the upper lethal temperature limit of loggerheads is between 33-35C; this temperature is more likely to be reached...
Show moreBecause of the logistics involved with field experiments, most of what is known about effects of temperature on the nest environment of loggerhead (Caretta caretta) sea turtles has been learned in the laboratory. Until now, scientists have been forced to speculate on what effects different sands might have on temperature within the nest. Results of the present study indicate that the upper lethal temperature limit of loggerheads is between 33-35C; this temperature is more likely to be reached in larger clutches, causing high mortality and low emergence success. Furthermore, the metabolic heat of a larger clutch will be exacerbated by warmer sand types. Ranges of temperatures experienced during the middle period of incubation, not only within the clutch, but over the course of the nesting season, are both above and below the pivotal temperature for sex determination in loggerheads. Perhaps it is inappropriate to use mean beach temperatures to predict outcomes of sex ratios on various coasts. It would be more prudent to concern ourselves with predicting survivorship of a clutch using results from this field study along with beach temperatures, rather than using laboratory temperatures to predict sex ratios.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15459
- Subject Headings
- Loggerhead turtle--Nests, Loggerhead turtle--Effect of temperature on
- Format
- Document (PDF)
- Title
- Long-term stress-induced changes in brain monoamines of the gray snapper, Lutjanus griseus. Neurotransmitters as indicators of physiological stress.
- Creator
- Brager, Darrin H., Florida Atlantic University, Lutz, Peter L.
- Abstract/Description
-
It is well established that altered neurotransmitter levels have long been associated with stress in many mammals. The purpose of this study was to determine if changes in the brain tissue concentration and/or turnover rates of the monoamine neurotransmitters could be used as an early indicator of physiological stress for fish in different aquatic ecosystems. Gray snapper, Lutjanus griseus, were collected from two sites, a pristine (control) and a polluted (experimental) site, classification...
Show moreIt is well established that altered neurotransmitter levels have long been associated with stress in many mammals. The purpose of this study was to determine if changes in the brain tissue concentration and/or turnover rates of the monoamine neurotransmitters could be used as an early indicator of physiological stress for fish in different aquatic ecosystems. Gray snapper, Lutjanus griseus, were collected from two sites, a pristine (control) and a polluted (experimental) site, classification based upon the hydrocarbon content of their sediment. The brains were quickly removed and dissected into three regions: frontal lobes, hypothalamus, and brain stem which were later analyzed for using high performance liquid chromatography. A decrease in brain tissue norepinephrine and dopamine concentration in the frontal lobes and hypothalamus was observed in individuals collected from the polluted site. No significant difference in either norepinephrine or dopamine concentration was present in the brain stem. Despite a decrease in dopamine levels, there was no significant change in dopamine turnover. There was a significant decrease in serotonin concentration in the hypothalamus at the polluted site. There was an increase in serotonergic activity in the hypothalamus and brain stem at the polluted site. A significant decrease in the weight of the hypothalamus in fish from the polluted site was also observed. These results suggest that a change in brain monoamines can be used as a early indicators of chronic environmental stress.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15458
- Subject Headings
- Neurotransmitters, Gray snapper--Effect of stress on, Stress (Physiology)
- Format
- Document (PDF)
- Title
- Evaluation of videotape as a form of patient education post-hip repair: Staff perspectives.
- Creator
- Biles, Teresa Ann., Florida Atlantic University, Tappen, Ruth M.
- Abstract/Description
-
Nurses have been able to invent new and creative ways to educate patients due to advances in technology. One advance, the use of videotapes for patient education, has increased in popularity over the last decade. This study evaluated the use of a videotape entitled "Moving Along," which was designed for post-hip repair patient education. A questionnaire was used to determine healthcare personnel's perspectives regarding content of the videotape and recommendations regarding videotape use and...
Show moreNurses have been able to invent new and creative ways to educate patients due to advances in technology. One advance, the use of videotapes for patient education, has increased in popularity over the last decade. This study evaluated the use of a videotape entitled "Moving Along," which was designed for post-hip repair patient education. A questionnaire was used to determine healthcare personnel's perspectives regarding content of the videotape and recommendations regarding videotape use and length. Data analyzed consisted of responses to the questionnaire. Analysis of the results suggested that the videotape should aid patients recovering from hip surgery as the content was found to be informative. Suggestions for information that could be added as well as deleted in order to improve the videotape are also reported. Videotapes permit the patient to review material at leisure and may free the nurse for other responsibilities.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15457
- Subject Headings
- Patient education--Audio-visual aids, Video tapes in education, Postoperative care
- Format
- Document (PDF)
- Title
- Evaluation of fish populations and relative abundance within Pools A, B and C of the Kissimmee River: Possible responses to the Pool B demonstration project.
- Creator
- Miller, Daniel E., Florida Atlantic University, Courtenay, Walter R. Jr.
- Abstract/Description
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Channelization of the Kissimmee River from 1962 to 1971 altered the natural hydrology of the river/floodplain system. Results of construction of the C-38 canal included loss of continuous flow of water and loss of floodplain habitat which adversely impacted the fish community. In 1984 the South Florida Water Management District (SFWMD) constructed the Pool B demonstration project to evaluate the feasibility of a planned restoration project. To evaluate success of the demonstration project in...
Show moreChannelization of the Kissimmee River from 1962 to 1971 altered the natural hydrology of the river/floodplain system. Results of construction of the C-38 canal included loss of continuous flow of water and loss of floodplain habitat which adversely impacted the fish community. In 1984 the South Florida Water Management District (SFWMD) constructed the Pool B demonstration project to evaluate the feasibility of a planned restoration project. To evaluate success of the demonstration project in enhancing the Pool B fish fauna, a hoop net sampling program was conducted in 1996. The data suggest that black crappie (Pomoxis nigromaculatus) and other sport species in Pool B are benefiting from habitat enhancements resulting from the demonstration project. Additional analysis distinguishes black crappie as the only centrarchid sampled that maintains activity during nocturnal hours. Bluegill (Lepomis macrochirus) were most active during May sampling when water temperatures were optimal for spawning.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15456
- Subject Headings
- Fish habitat improvement--Florida--Kissimmee River, Fishes--Conservation--Florida--Kissimmee River, Fish populations--Florida--Kissimmee River--Measurement
- Format
- Document (PDF)