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- Title
- Quantum isotropy and dynamical quantum symmetry reduction.
- Creator
- Hogan, Matthew, Beetle, Christopher, Engle, Jonathan S., Graduate College, Mendonca, P.
- Abstract/Description
-
We give a diffeomorphism and gauge covariant condition equivalent to homogeneity and isotropy which can be quantized, yielding a definition of a diffeomorphism-invariant, homogeneous isotropic sector of loop quantum gravity without fixing a graph. We then specialize this condition to Bianchi I cosmologies, in which case it becomes a condition for isotropy. We show how, by quantizing and imposing this condition in Bianchi I loop quantum cosmology, one exactly recovers isotropic loop quantum...
Show moreWe give a diffeomorphism and gauge covariant condition equivalent to homogeneity and isotropy which can be quantized, yielding a definition of a diffeomorphism-invariant, homogeneous isotropic sector of loop quantum gravity without fixing a graph. We then specialize this condition to Bianchi I cosmologies, in which case it becomes a condition for isotropy. We show how, by quantizing and imposing this condition in Bianchi I loop quantum cosmology, one exactly recovers isotropic loop quantum cosmology, including the usual ‘improved dynamics.’ We will also discuss how this reduction sheds light on which operator ordering to use when defining operators corresponding to directional Hubble rates, expansion, and shear quantities relevant for discussing the resolution of the initial singularity.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00005821
- Format
- Document (PDF)
- Title
- Fire ants in sea-turtle nesting areas: A distribution survey of invasive ants in Boca Raton, FL.
- Creator
- Romais, Danielle K., Wetterer, James K., Markwith, Scott, Graduate College
- Abstract/Description
-
The red imported fire ant, Solenopsis invicta, is native to South America and was introduced to Alabama in the 1930s. This predatory species rapidly spread throughout the southeastern US and parts of the West Indies, causing serious ecological and economic impacts. Solenopsis invicta is known to attack the eggs and hatchlings of ground nesting birds and reptiles. The ants also swarm into sea turtle nests attacking hatchlings and diminishing their chance for survival. This study is part of a...
Show moreThe red imported fire ant, Solenopsis invicta, is native to South America and was introduced to Alabama in the 1930s. This predatory species rapidly spread throughout the southeastern US and parts of the West Indies, causing serious ecological and economic impacts. Solenopsis invicta is known to attack the eggs and hatchlings of ground nesting birds and reptiles. The ants also swarm into sea turtle nests attacking hatchlings and diminishing their chance for survival. This study is part of a larger research that aimed to survey the distribution of ants at a sea turtle nesting beaches in South Florida and St. Croix, USVI. This particular study was conducted in Boca Raton, Florida. Besides providing a baseline dataset on ant species distribution in the area, this study also aimed at validating the survey methodology by finding consistency in the distribution over multiple days surveyed. The results indicate that, although more detailed surveys would produce more thorough results, we can state that the methodology is consistent in determining species distribution.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00005851
- Format
- Document (PDF)
- Title
- N-terminal truncated cardiac TnI improves cardiac function in vivo and rescues restrictive cardiomyopathy.
- Creator
- Jean-Charles, Pierre-Yves, Li, Yuejin, Nan, Changlong, Chen, Guozhen, Feng, H., Huang, Xupei, Jin, J.P., Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164515
- Subject Headings
- Cardiac arrest, Troponin --diagnostic use, Transgenic mice
- Format
- Document (PDF)
- Title
- Dose-dependent arrhythmia and cardiac dysfunction in restrictive cardiomyopathy mice due to troponin mutations.
- Creator
- Li, Yuejin, Jean-Charles, Pierre-Yves, Nan, Changlong, Chen, Guozhen, Graduate College, Huang, Xupei
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164611
- Subject Headings
- Arrhythmia --drug therapy, Heart failure, Proteomics
- Format
- Document (PDF)
- Title
- New paternity analyses may confound current population models for loggerhead sea turtles (caretta caretta).
- Creator
- Lasala, Jacob, Harrison, J. S., Williams, K., Frick, M, Rostal, D. C., Wyneken, Jeanette, Graduate College
- Date Issued
- 2013-04-12
- PURL
- http://purl.flvc.org/fcla/dt/3361944
- Subject Headings
- Loggerhead turtle, Caretta caretta, Polyandry, Population Dynamics
- Format
- Document (PDF)
- Title
- Climate change impacts on the secondary metabolite production in Caribbean coral reef sponges.
- Creator
- Vansach, Tifanie, Duckworth, Alan R., Hard, M., Stubler, A., West, Lyndon, Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164802
- Subject Headings
- Climatic changes --Environmental aspects, Metabolism, Sponges --Caribbean Sea
- Format
- Document (PDF)
- Title
- Diet and foraging ecology of diamondback terrapins (malaclemys terrapin) in Everglades National Park, FL.
- Creator
- Denton, Mathew, Demopoulos, Amanda W. J., Hart, Kristen, Oleinik, Anton E., Baldwin, John D., Graduate College
- Date Issued
- 2013-04-12
- PURL
- http://purl.flvc.org/fcla/dt/3361924
- Subject Headings
- Diamondback terrapin--Ecology--United States, Malaclemys terrapin, Everglades National Park (Fla.)
- Format
- Document (PDF)
- Title
- Neurodynamic predictions of musical tonality.
- Creator
- Flaig, Nicole, Kim, Ji Chul, Krumhansl, Carol, Large, Edward W., Graduate College
- Date Issued
- 2013-04-12
- PURL
- http://purl.flvc.org/fcla/dt/3361928
- Subject Headings
- Music, Tonality, Complex systems and interdisciplinary science
- Format
- Document (PDF)
- Title
- Berth scheduling in container terminals: a proactive approach to address uncertainties in arrival and handling times.
- Creator
- Portal Palomo, Maria I., Ghenai, Chaouki, Kaisar, Evangelos I., Golias, M. M., Graduate College
- Date Issued
- 2013-04-12
- PURL
- http://purl.flvc.org/fcla/dt/3361341
- Subject Headings
- Container terminals, Container terminals Management
- Format
- Document (PDF)
- Title
- Visual wavelength discrimination by the loggerhead turtle, Caretta caretta.
- Creator
- Young, Morgan, Salmon, Michael, Forward, Richard B., Jr., Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164729
- Subject Headings
- Loggerhead turtle, Spectral sensitivity, Phototaxis
- Format
- Document (PDF)
- Title
- The effects of POSS surface treatment on the interlaminar property of marine composites.
- Creator
- Powell, Felicia M., Granata, Richard D., Hosur, Mahesh, Mahfuz, Hassan, Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164682
- Subject Headings
- Composite materials --Delamination, Fibrous composites, Polymers --Effect of radiation on
- Format
- Document (PDF)
- Title
- Systems Identification and Control of an Autonomous Amphibious Vehicle: Experimental Testing & Control Model Validation for an Autonomous Cargo Transport Navy Vehicle.
- Creator
- Marquardt, Joseph G., von Ellenrieder, Karl, Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3172438
- Subject Headings
- Motor vehicles, Amphibious--United States, Water waves, Sea-power --United States
- Format
- Document (PDF)
- Title
- Using clusters of population vulnerability to determine hurricane shelter locations a GIS based investigation of Broward county Florida.
- Creator
- Prasad, Shivangi, Esnard, Ann-Margaret, Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164766
- Subject Headings
- Hurricane protection, Geographic information systems, Broward County (Fla.) --Population
- Format
- Document (PDF)
- Title
- Replacement of sex steroids prevent lymphocytic infiltration of the lacrimal glands in Sjögren's Syndrome (SS).
- Creator
- Mostafa, Safinaz, Azzarolo , Ana Maria, Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164642
- Subject Headings
- Sjogren's syndrome, Hormones, Sex, Blood --Pathophysiology
- Format
- Document (PDF)
- Title
- Sequence stratigraphy of the arcadia formation in southeastern Florida: an integrated stratigraphic approach.
- Creator
- Wright, Caroline Marie, Graduate College
- Date Issued
- 2013-04-12
- PURL
- http://purl.flvc.org/fcla/dt/3361375
- Subject Headings
- Lithofacies, Stratigraphic correlation
- Format
- Document (PDF)
- Title
- The role of chemical and visual cues in habitat location and selection by the Sargassum crab Portunus sayi.
- Creator
- West, Lorin E., Graduate College
- Date Issued
- 2012-03-30
- PURL
- http://purl.flvc.org/fcla/dt/3342457
- Format
- Document (PDF)
- Title
- Corrosion Propagation in Dry-Cast Reinforced Concrete Pipes.
- Creator
- Weber, Brian W., Presuel-Moreno, Francisco, Graduate College
- Abstract/Description
-
Dry-cast reinforced concrete pipes (D-C-RCP) have been used as drainage pipes by the Florida Department of Transportation and other DOTs in the United States. Corrosion of the steel reinforcement embedded in concrete is a major economic burden for bridges and other structures subjected to de-icing salts, or harsh marine environments. This study investigates the corrosion propagation of instrumented specimens obtained from segments of two types of D-CRCPs (Types F and C). The objectives of...
Show moreDry-cast reinforced concrete pipes (D-C-RCP) have been used as drainage pipes by the Florida Department of Transportation and other DOTs in the United States. Corrosion of the steel reinforcement embedded in concrete is a major economic burden for bridges and other structures subjected to de-icing salts, or harsh marine environments. This study investigates the corrosion propagation of instrumented specimens obtained from segments of two types of D-CRCPs (Types F and C). The objectives of this study are to better understand the mechanism of corrosion propagation in D-C-RCPs and to identify the factors that affect the corrosion propagation. Potential, depolarization, linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) measurements were carried out to monitor the corrosion condition and the mechanistic properties of the reinforcement. A galvanostatic approach was used to accelerate the chloride transport to the steel surface until corrosion initiated. Once the specimen was declared active, the electric field was suspended. For ~250 days, the corrosion was monitored in the laboratory environment. The specimens were then transferred to a high humidity chamber and anodically polarized with a galvanostat to accelerate the corrosion propagation. The specimens were disconnected every two weeks to perform depolarization, LPR and EIS measurements. In the high humidity environment, type F specimens are exhibiting a higher corrosion rate most likely due to the smaller concrete cover allowing the chlorides to reach the steel rebar surface quicker and reach a higher chloride concentration. Results will be compared with conventional gravimetric weight loss measurements.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00005863
- Format
- Document (PDF)
- Title
- Exploring the stability of an eigenvalue problem approximation technique used to define the angular momentum of almost spherical black holes.
- Creator
- Wilder, Shawn M., Beetle, Christopher, Graduate College
- Date Issued
- 2011-04-08
- PURL
- http://purl.flvc.org/fcla/dt/3164804
- Subject Headings
- Eigenvalues, Black holes (Astronomy), Deformations (Mechanics)
- Format
- Document (PDF)
- Title
- Exploring a generalization of a definition for angular momentum on arbitrary Riemannian manifolds.
- Creator
- Wilder, Shawn M., Graduate College
- Date Issued
- 2012-03-30
- PURL
- http://purl.flvc.org/fcla/dt/3342458
- Format
- Document (PDF)
- Title
- Synaptic Architecture of Cortical Columns.
- Creator
- Wilson, Daniel E., Fitzpatrick, David, Graduate College
- Abstract/Description
-
The visual cortex of higher mammals, including humans, is arranged as to achieve a continuously varying map of features such as the orientation of contours in the environment. Previous studies used intrinsic signal and two-photon imaging to examine the functional composition of these cortical maps, but lacked the functional resolution to resolve the underlying synaptic architecture. Here, we exploited recent advances in genetically encoded calcium indicators to perform in vivo two photon...
Show moreThe visual cortex of higher mammals, including humans, is arranged as to achieve a continuously varying map of features such as the orientation of contours in the environment. Previous studies used intrinsic signal and two-photon imaging to examine the functional composition of these cortical maps, but lacked the functional resolution to resolve the underlying synaptic architecture. Here, we exploited recent advances in genetically encoded calcium indicators to perform in vivo two photon imaging of dendrites and dendritic spines in an animal with a mapped visual cortex. We found sharp orientation and direction tuning when we presented drifting gratings and imaged synaptic calcium transients from large numbers of dendritic spines in single neurons, obtaining synaptic maps of orientation preference. In addition, we implemented a newly developed two-photon microscope that uses acousto-optical deflectors to rapidly steer a pulsed laser in three dimensions. This technology allowed us to image 320 single cells in an 800x800x200 micron three-dimensional volume, which yielded a three-dimensional orientation map with single-cell resolution. In the future, we will perform fast, three-dimensional imaging of a single cell and its entire dendritic tree to monitor functional properties of a cell’s inputs and its somatic spiking output. These experiments will yield important insight into synaptic integration and sensory processing in cortical maps and how such organizing principles might be disrupted in disease states.
Show less - Date Issued
- 2014
- PURL
- http://purl.flvc.org/fau/fd/FA00005864
- Format
- Document (PDF)