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Title: Interview with Evelyn and Charles Johnson.
Creator: Johnson, Evelyn, Johnson, Charles
Abstract/Description: The Johnsons were interviewed in relation to their aunt and great aunt respectively, Edna Pearce Lockett. She served as the third female legislator in the state of Florida while operating one of the largest cattle ranches in the state.
Date Issued: 2007
PURL: http://purl.flvc.org/fau/fd/FA00007878_set
Subject Headings: Oral histories --Florida
Format: Set of related objects

Title: Estimating the vulnerability of Everglades peat to combustion.
Creator: Johnson, James., Charles E. Schmidt College of Science, Center for Environmental Studies
Abstract/Description: Fire occurrences in the Everglades have increased since hydrologic alterations began, yet the vulnerability of Everglades peat to combustion during wildfires has yet to be determined. Natural fire regimes help maintain ecosystem functions and services and disruptions of natural disturbance regimes can have detrimental impacts, jeopardizing ecosystem health. Severe peat combustion can destroy native vegetation, alter microtopography, and release large amounts of stored carbon into the...
Show moreFire occurrences in the Everglades have increased since hydrologic alterations began, yet the vulnerability of Everglades peat to combustion during wildfires has yet to be determined. Natural fire regimes help maintain ecosystem functions and services and disruptions of natural disturbance regimes can have detrimental impacts, jeopardizing ecosystem health. Severe peat combustion can destroy native vegetation, alter microtopography, and release large amounts of stored carbon into the atmosphere. To create a better understanding of the mechanistic controls on Everglades ground fires, the soil's physical properties within several sites of Water Conservation Area 3 and how changes in water table affect these physical characteristics were determined. Areas disturbed by hydrologic alterations contain higher mineral content and therefore require lower water content to combust when compared to preserved regions. Changes in water tables have a significant effect on soil moisture and lower water tables drastically increase the vulnerability of a region.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3358594
Subject Headings: Ecological engineering, Conservation of natural resources, Fire ecology, Ecology
Format: Document (PDF)

Title: Mapping urban land cover using multi-scale and spatial autocorrelation information in high resolution imagery.
Creator: Johnson, Brian A., Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description: Fine-scale urban land cover information is important for a number of applications, including urban tree canopy mapping, green space analysis, and urban hydrologic modeling. Land cover information has traditionally been extracted from satellite or aerial images using automated image classification techniques, which classify pixels into different categories of land cover based on their spectral characteristics. However, in fine spatial resolution images (4 meters or better), the high degree of...
Show moreFine-scale urban land cover information is important for a number of applications, including urban tree canopy mapping, green space analysis, and urban hydrologic modeling. Land cover information has traditionally been extracted from satellite or aerial images using automated image classification techniques, which classify pixels into different categories of land cover based on their spectral characteristics. However, in fine spatial resolution images (4 meters or better), the high degree of within-class spectral variability and between-class spectral similarity of many types of land cover leads to low classification accuracy when pixel-based, purely spectral classification techniques are used. Object-based classification methods, which involve segmenting an image into relatively homogeneous regions (i.e. image segments) prior to classification, have been shown to increase classification accuracy by incorporating the spectral (e.g. mean, standard deviation) and non-spectral (e.g. te xture, size, shape) information of image segments for classification. One difficulty with the object-based method, however, is that a segmentation parameter (or set of parameters), which determines the average size of segments (i.e. the segmentation scale), is difficult to choose. Some studies use one segmentation scale to segment and classify all types of land cover, while others use multiple scales due to the fact that different types of land cover typically vary in size. In this dissertation, two multi-scale object-based classification methods were developed and tested for classifying high resolution images of Deerfield Beach, FL and Houston, TX. These multi-scale methods achieved higher overall classification accuracies and Kappa coefficients than single-scale object-based classification methods., Since the two dissertation methods used an automated algorithm (Random Forest) for image classification, they are also less subjective and easier to apply to other study areas than most existing multi-scale object-based methods that rely on expert knowledge (i.e. decision rules developed based on detailed visual inspection of image segments) for classifying each type of land cover.
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Date Issued: 2012
PURL: http://purl.flvc.org/FAU/3342110
Subject Headings: Image processing, Digital techniques, Remote sensing, Mathematics, Remote-sensing images, Computational intelligence, Cities and towns, Remote sensing, Environmental sciences, Remote sensing, Spatial analysis (Statistics)
Format: Document (PDF)

Title: Alternatives for Third World small farm development.
Creator: Johnson, Victoria., Florida Atlantic University, Lee, David R., Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description: Conventional agricultural development models have sought to improve Third World agricultural productivity by replacing traditional subsistence systems with sophisticated high-external-input farming methods. This approach has not solved the food problem of Third World nations because small farmers have been unable to participate in the modernization process and because modern methods are not environmentally sustainable. Alternative low-external-input agriculture provides greater opportunities...
Show moreConventional agricultural development models have sought to improve Third World agricultural productivity by replacing traditional subsistence systems with sophisticated high-external-input farming methods. This approach has not solved the food problem of Third World nations because small farmers have been unable to participate in the modernization process and because modern methods are not environmentally sustainable. Alternative low-external-input agriculture provides greater opportunities for small farmer participation, offers more benefits to small farmers, and is environmentally sustainable over a longer period of time than conventional agriculture. Comparative analysis of conventional and alternative projects indicates that the alternative model is more successful in effecting agricultural development and is more likely to improve Third World food security.
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Date Issued: 1988
PURL: http://purl.flvc.org/fcla/dt/14479
Subject Headings: Farms, Small--Developing countries
Format: Document (PDF)

Title: Object Oriented Classification of Australian Pine (Casuarina equisetifolia), an Invasive Exotic Species in South Florida.
Creator: Johnson, Brian A., Xie, Zhixiao, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Geosciences
Abstract/Description: Invasive exotic plant species cause a number of problems in native south Florida ecosystems, and a great deal of effort is being put into controlling the populations ofthese species. Control efforts require updated information on the locations of exotic species. This information can be obtained from high resolution remotely sensed data such as digital orthoimagery and LIDAR. Extraction of information from these data sources is often problematic using traditional pixel-based image processing...
Show moreInvasive exotic plant species cause a number of problems in native south Florida ecosystems, and a great deal of effort is being put into controlling the populations ofthese species. Control efforts require updated information on the locations of exotic species. This information can be obtained from high resolution remotely sensed data such as digital orthoimagery and LIDAR. Extraction of information from these data sources is often problematic using traditional pixel-based image processing techniques. An object oriented method of image analysis, however, has been shown to be better suited to this task. One invasive exotic species that has become widespread in south Florida is Casuarina equisetifolia, also known as Australian pine. This study develops a semiautomated procedure for detecting Australian pine over a large, diverse area with high resolution remotely sensed data using the object oriented method of analysis.
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Date Issued: 2007
PURL: http://purl.flvc.org/fau/fd/FA00000775
Subject Headings: Ecology--Remote sensing, Aerial photogrammetry
Format: Document (PDF)

Title: ANTENNULAR CHEMOSENSITIVITY TO FEEDING STIMULI IN THE SPINY LOBSTER PANULIRUS ARGUS.
Creator: JOHNSON, BRUCE RAYMOND, Florida Atlantic University, Ache, Barry W., Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: Antennular chemoreceptors of P. argus were surveyed electro-physiologically to determine their relative sensitivity to low molecular weight components of the shrimp, Penaeus duorarum. An ultrafiltrate (less than 1,000 molecular weight) of shrimp extract did not differ significantly in stimulus value from the total extract itself. A mixture of the 19 amino acids present in the ultrafiltrate was slightly less stimulatory than the total extract. Taurine alone approximated the stimulus value of...
Show moreAntennular chemoreceptors of P. argus were surveyed electro-physiologically to determine their relative sensitivity to low molecular weight components of the shrimp, Penaeus duorarum. An ultrafiltrate (less than 1,000 molecular weight) of shrimp extract did not differ significantly in stimulus value from the total extract itself. A mixture of the 19 amino acids present in the ultrafiltrate was slightly less stimulatory than the total extract. Taurine alone approximated the stimulus value of the amino acid mixture at its component concentration. Taurine was also the most stimulatory of the 19 amino acids when compared at the homogeneous 10^-3 M concentration. Taurine is the major individual stimulant of shrimp extract but a contribution is also made from other non-amino acid low molecular weight compounds.
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Date Issued: 1976
PURL: http://purl.flvc.org/fcla/dt/13805
Subject Headings: Caribbean spiny lobster, Spiny lobsters, Chemoreceptors
Format: Document (PDF)

Title: Carbohydrate Recognition of Bi-pyridine Bridged Peptide Receptor.
Creator: Johnson, Claudia A., Cudic, Predrag, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
Abstract/Description: A novel carbohydrate receptor based on the structure of the antibiotic polymxin B was synthesized. The receptor was a cyclic heptapeptide. which was bridged using 2, 2'-bi pyridine-5,5"- dicarboxylic acid. The association constants of the receptor and a variety of sugars were determined using UV /Vis and fluorescence spectroscopy and observed log K0 values are in the range from 3 .8 to 4.1 for the pentoses, logKa 3.3 to 3.8 for the hexoxes and 0 to 2.9 logKa values from 0-2.9 for...
Show moreA novel carbohydrate receptor based on the structure of the antibiotic polymxin B was synthesized. The receptor was a cyclic heptapeptide. which was bridged using 2, 2'-bi pyridine-5,5"- dicarboxylic acid. The association constants of the receptor and a variety of sugars were determined using UV /Vis and fluorescence spectroscopy and observed log K0 values are in the range from 3 .8 to 4.1 for the pentoses, logKa 3.3 to 3.8 for the hexoxes and 0 to 2.9 logKa values from 0-2.9 for disaccharides and logKa of2.6 to 3.11 for the charged sugars. We demonstrated that polymixin based receptors are capable of binding various monosaccharide substrates in aqueous media, displaying structure selectivity with respect to monosaccharide ring size.
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Date Issued: 2007
PURL: http://purl.flvc.org/fau/fd/FA00000776
Subject Headings: Protein engineering, Neuropeptides--Receptors, Chemistry, Organic, Cellular recognition
Format: Document (PDF)

Title: Photodegradation of bromacil and terbacil by ultraviolet radiation.
Creator: Johnson, Hannah Kalyani, Florida Atlantic University, Parkanyi, Cyril, Charles E. Schmidt College of Science, Department of Chemistry and Biochemistry
Abstract/Description: The photodegradation of bromacil (5-bromo-3-sec-butyl-6-methyluracil) and terbacil (5-chloro-3-tert-butyl-6-methyluracil) by ultraviolet radiation has been investigated. Irradiation of aerated aqueous solutions of the title compounds (25 ppm), led to fast degradation of both. The reactions were found to follow first order kinetics with rate constants 5.77x10^-1 hr^-1 in the case of bromacil and 8.45x10^-2 hr^-1 in the case of terbacil. Degradation in ethanol and cyclohexane was also studied,...
Show moreThe photodegradation of bromacil (5-bromo-3-sec-butyl-6-methyluracil) and terbacil (5-chloro-3-tert-butyl-6-methyluracil) by ultraviolet radiation has been investigated. Irradiation of aerated aqueous solutions of the title compounds (25 ppm), led to fast degradation of both. The reactions were found to follow first order kinetics with rate constants 5.77x10^-1 hr^-1 in the case of bromacil and 8.45x10^-2 hr^-1 in the case of terbacil. Degradation in ethanol and cyclohexane was also studied, but the solutions were not analyzed for photoproducts. The photoreaction mixture of both the herbicides in water showed four peaks on GC, indicating four photoproducts. Loss of halogens from the heterocyclic ring has been observed as shown by the presence of Br- in the case of bromacil and Cl- in the case of terbacil in the photoreaction solution. 6-Methyluracil which was isolated from the aqueous fraction of the photoreaction mixture was the common photoproduct from both bromacil and terbacil. From the organic fractions 3-sec-butyl-5-acetyl-5-hydroxyhydantoin was identified in the case of bromacil and 3-tert-butyl-5-acetyl-5-hydroxyhydantoin in the case of terbacil. The other two photoproducts were left unidentified.
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Date Issued: 1993
PURL: http://purl.flvc.org/fcla/dt/14929
Subject Headings: Ultraviolet radiation, Photochemistry--Deterioration, Herbicides, Uracil
Format: Document (PDF)

Title: Therapeutic Options for the Treatment of Breast Cancer: Using Cytoreg and Genistein Isoflavone.
Creator: Johnson, Michelle M., Kumi-Diaka, James, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
Abstract/Description: In spite the heavy investments in therapeutic research breast cancer still impacts the lives of women globally. The projected incidence of new cases in USA for 2008 is 67,770, with estimated 40,480 deaths. In this study, we investigated the therapeutic efficacy of Cytoreg®-genistein combination treatment on MCF-7 human breast cancer cells. MCF-7 cells were treated with genistein and Cytoreg® single and combination treatments for 24- 48hr; and the chemosensitivity assessed using bioassays:...
Show moreIn spite the heavy investments in therapeutic research breast cancer still impacts the lives of women globally. The projected incidence of new cases in USA for 2008 is 67,770, with estimated 40,480 deaths. In this study, we investigated the therapeutic efficacy of Cytoreg®-genistein combination treatment on MCF-7 human breast cancer cells. MCF-7 cells were treated with genistein and Cytoreg® single and combination treatments for 24- 48hr; and the chemosensitivity assessed using bioassays: Trypan Blue and MTT for cell viability; Ethidium bromide/Rhodamine 123 to assess apoptosis induction; F AM PolyCaspase binding assay for mechanism of action. The overall data indicated dose- and timedependent cell death in the MCF-cells and that apoptosis was the major means of treatmentinduced growth inhibition. There was evidence of Cytoreg®-induced autophagy in the cells. The overall findings indicated that genistein-Cytoreg® combination was more efficacious than either genistein or Cytoreg® alone. Cytoreg® enhanced the phytosensitivity of MCF-7 cells to genistein isoflavone.
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Date Issued: 2008
PURL: http://purl.flvc.org/fau/fd/FA00000777
Subject Headings: Breast--Cancer--Treatment, Phytochemicals--Physiological effect, Apoptosis--Molecular aspects, Phytoestrogens--Health aspects, Outcome assessment (Medical care)
Format: Document (PDF)

Title: SELECTED TOPICS IN QUANTUM AND POST-QUANTUM CRYPTOGRAPHY.
Creator: Johnson, Floyd, Bai, Shi, Steinwandt, Rainer, Florida Atlantic University, Department of Mathematical Sciences, Charles E. Schmidt College of Science
Abstract/Description: In 1994 when Peter Shor released his namesake algorithm for factoring and solving the discrete logarithm problem he changed cryptography forever. Many of the state-of-the-art cryptosystems for internet and other computerized communications will become obsolete with the advent of quantum computers. Two distinct approaches have grown to avoid the downfall of secure communication: quantum cryptography which is based in physics and information theory, and post-quantum cryptography which uses...
Show moreIn 1994 when Peter Shor released his namesake algorithm for factoring and solving the discrete logarithm problem he changed cryptography forever. Many of the state-of-the-art cryptosystems for internet and other computerized communications will become obsolete with the advent of quantum computers. Two distinct approaches have grown to avoid the downfall of secure communication: quantum cryptography which is based in physics and information theory, and post-quantum cryptography which uses mathematical foundations believed not to be weak against even quantum assisted adversaries. This thesis is the culmination of several studies involving cryptanalysis of schemes in both the quantum and post-quantum paradigms as well as mathematically founded constructions in the post-quantum regime. The first two chapters of this thesis on background information are intended for the reader to more fully grasp the later chapters. The third chapter shows an attack and ultimate futility of a variety of related quantum authentication schemes. The fourth chapter shows a parametric improvement over other state-of-the-art schemes in lattice based cryptography by utilizing a different cryptographic primitive. The fifth chapter proposes an attack on specific parameters of a specific lattice-based cryptographic primitive. Finally, chapter six presents a construction for a fully homomorphic encryption scheme adapted to allow for privacy enhanced machine learning.
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Date Issued: 2022
PURL: http://purl.flvc.org/fau/fd/FA00014088
Subject Headings: Quantum cryptography, Cryptography, Homomorphisms (Mathematics), Lattices (Mathematics)
Format: Document (PDF)

Title: “I MADE MY OWN LANE AT THE COMMUNITY COLLEGE, DROVE IT, BUT FIGURED OUT I WANTED TO CONTINUE ON FROM THERE:” A NARRATIVE STUDY ON THE HERO’S JOURNEY OF LATINO MALE TRANSFER STUDENTS.
Creator: Johnson, Ronald Romances, Salinas Jr., Cristóbal, Floyd, Deborah L., Florida Atlantic University, Department of Educational Leadership and Research Methodology, Charles E. Schmidt College of Science
Abstract/Description: Excelencia in Education (2016) reported that 21% of traditional age college male students were Latino males, second only to White males. The report further noted that Latino males are ranked the lowest in degree attainment – of whom only 20% have earned an associate’s degree or higher (Excelencia in Education, 2016). As an insufficient number of Latino males are graduating with post-secondary degrees, more research must be conducted to explore their educational journey from the community...
Show moreExcelencia in Education (2016) reported that 21% of traditional age college male students were Latino males, second only to White males. The report further noted that Latino males are ranked the lowest in degree attainment – of whom only 20% have earned an associate’s degree or higher (Excelencia in Education, 2016). As an insufficient number of Latino males are graduating with post-secondary degrees, more research must be conducted to explore their educational journey from the community college to the university and how to best support them through their transition. Therefore, the purpose of this qualitative narrative research study was to explore the stories of Latino male students as they transfer from a community college to a university. To capture the essence of Latino male students’ stories through the community college transfer experience to university, the research questions focused on what motivated and influenced their journey through the community college to a university. The research questions that guided this study were: What motivated and influenced Latino males’ decisions to enroll in a community college? What motivated and influenced Latino males’ decisions to transfer from a community college to a university? How do Latino male transfer students describe their transition from community college to a university? In this qualitative narrative research study, 10 participants participated in in-depth, semi-structured virtual interviews and completed two journal prompts. To assist in triangulation and validity, participants reviewed the data for accuracy, and thick rich descriptions were used to provide breadth and depth to their narratives. Once the data were collected, it was organized through the qualitative research data management software MAXQDA and analyzed using in vivo, descriptive, and pattern coding. The conceptual frameworks that informed this narrative study were the hero’s journey by Joseph Campbell (2008) and transition theory by Nancy K. Schlossberg (2011).
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Date Issued: 2022
PURL: http://purl.flvc.org/fau/fd/FA00013922
Subject Headings: Transfer students, Latin American students, Education, Higher
Format: Document (PDF)

FAU Theses and Dissertations (10)	+ -
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Aerial photogrammetry (1)	+ -
Apoptosis--Molecular aspects (1)	+ -
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Cellular recognition (1)	+ -

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