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2012

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Articles 16021 - 16050 of 19478

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A Mass Balance Model For Designing Green Roof Systems That Incorporate A Cistern For Re-Use, Mike Hardin, Martin Wanielista, Manoj Chopra Jan 2012

A Mass Balance Model For Designing Green Roof Systems That Incorporate A Cistern For Re-Use, Mike Hardin, Martin Wanielista, Manoj Chopra

Faculty Bibliography 2010s

Green roofs, which have been used for several decades in many parts of the world, offer a unique and sustainable approach to stormwater management. Within this paper, evidence is presented on water retention for an irrigated green roof system. The presented green roof design results in a water retention volume on site. A first principle mass balance computer model is introduced to assist with the design of these green roof systems which incorporate a cistern to capture and reuse runoff waters for irrigation of the green roof. The model is used to estimate yearly stormwater retention volume for different cistern …

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Discovery Of Main-Belt Comet P/2006 Vw139 By Pan-Starrs1, Henry H. Hsieh, Bin Yang, Nader Haghighipour, Heather M. Kaluna, Alan Fitzsimmons, Larry Denneau, Bojan Novaković, Robert Jedicke, Richard J. Wainscoat, James D. Armstrong, Samuel R. Duddy, Stephen C. Lowry, Chadwick A. Trujillo, Marco Micheli, Jacqueline V. Keane, Laurie Urban, Timm Riesen, Karen J. Meech, Shinsuke Abe, Yu-Chi Cheng, Wen-Ping Chen, Mikael Granvik, Tommy Grav, Wing-Huen Ip, Daisuke Kinoshita, Jan Kleyna, Pedro Lacerda, Tim Lister, Andrea Milani, David J. Tholen, Peter Vereš, Carey M. Lisse, Michael S. Kelley, Yanga R. Fernández, Bhuwan C. Bhatt, Devendra K. Sahu, Nick Kaiser, K. C. Chambers, Klaus W. Hodapp, Eugene A. Magnier, Paul A. Price, John L. Tonry Jan 2012

Discovery Of Main-Belt Comet P/2006 Vw139 By Pan-Starrs1, Henry H. Hsieh, Bin Yang, Nader Haghighipour, Heather M. Kaluna, Alan Fitzsimmons, Larry Denneau, Bojan Novaković, Robert Jedicke, Richard J. Wainscoat, James D. Armstrong, Samuel R. Duddy, Stephen C. Lowry, Chadwick A. Trujillo, Marco Micheli, Jacqueline V. Keane, Laurie Urban, Timm Riesen, Karen J. Meech, Shinsuke Abe, Yu-Chi Cheng, Wen-Ping Chen, Mikael Granvik, Tommy Grav, Wing-Huen Ip, Daisuke Kinoshita, Jan Kleyna, Pedro Lacerda, Tim Lister, Andrea Milani, David J. Tholen, Peter Vereš, Carey M. Lisse, Michael S. Kelley, Yanga R. Fernández, Bhuwan C. Bhatt, Devendra K. Sahu, Nick Kaiser, K. C. Chambers, Klaus W. Hodapp, Eugene A. Magnier, Paul A. Price, John L. Tonry

Faculty Bibliography 2010s

The main-belt asteroid (300163) 2006 VW139 (later designated P/2006 VW139) was discovered to exhibit comet-like activity by the Pan-STARRS1 (PS1) survey telescope using automated point-spread-function analyses performed by PS1's Moving Object Processing System. Deep follow-up observations show both a short (similar to 10 '') antisolar dust tail and a longer (similar to 60 '') dust trail aligned with the object's orbit plane, similar to the morphology observed for another main-belt comet (MBC), P/2010 R2 (La Sagra), and other well-established comets, implying the action of a long-lived, sublimation-driven emission event. Photometry showing the brightness of the near-nucleus coma remaining constant over …

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Fixed-Point Attractor For Chirp In Nonlinear Waveguide Arrays, Darren D. Hudson, J. Nathan Kutz, Thomas R. Schibli, Qing Chao, Demetrios N. Christodoulides, Roberto Morandotti, Steven T. Cundiff Jan 2012

Fixed-Point Attractor For Chirp In Nonlinear Waveguide Arrays, Darren D. Hudson, J. Nathan Kutz, Thomas R. Schibli, Qing Chao, Demetrios N. Christodoulides, Roberto Morandotti, Steven T. Cundiff

Faculty Bibliography 2010s

The propagation of ultrashort optical pulses in an AlGaAs waveguide array is studied using frequency-resolved optical gating measurements. In the nonlinear regime, the measurements show that the pulses at the output of the array evolve toward a set chirp value that is independent of the input chirp. Simulations reproduce the experimental results. The observations can be described as a fixed-point attractor on a chirp-intensity map.

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Spectral Analysis Of Certain Schrodinger Operators, Mourad E.H. Ismail, Erik Koelink Jan 2012

Spectral Analysis Of Certain Schrodinger Operators, Mourad E.H. Ismail, Erik Koelink

Faculty Bibliography 2010s

The J-matrix method is extended to difference and q-difference operators and is applied to several explicit differential, difference, q-difference and second order Askey-Wilson type operators. The spectrum and the spectral measures are discussed in each case and the corresponding eigenfunction expansion is written down explicitly in most cases. In some cases we encounter new orthogonal polynomials with explicit three term recurrence relations where nothing is known about their explicit representations or orthogonality measures. Each model we analyze is a discrete quantum mechanical model in the sense of Odake and Sasaki [J. Phys. A: Math. Theor. 44 (2011), 353001, 47 pages].

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Orthogonal Basic Hypergeometric Laurent Polynomials, Mourad E.H. Ismail Jan 2012

Orthogonal Basic Hypergeometric Laurent Polynomials, Mourad E.H. Ismail

Faculty Bibliography 2010s

The Askey-Wilson polynomials are orthogonal polynomials in x = cos theta, which are given as a terminating (4)phi(3) basic hypergeometric series. The non-symmetric Askey-Wilson polynomials are Laurent polynomials in z = e(i theta), which are given as a sum of two terminating (4)phi(3)'s. They satisfy a biorthogonality relation. In this paper new orthogonality relations for single (4)phi(3)'s which are Laurent polynomials in z are given, which imply the non-symmetric Askey-Wilson biorthogonality. These results include discrete orthogonality relations. They can be considered as a classical analytic study of the results for non-symmetric Askey-Wilson polynomials which were previously obtained by affine Hecke …

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Exploring Behaviors Of Stochastic Differential Equation Models Of Biological Systems Using Change Of Measures, Sumit Kumar Jha, Christopher James Langmead Jan 2012

Exploring Behaviors Of Stochastic Differential Equation Models Of Biological Systems Using Change Of Measures, Sumit Kumar Jha, Christopher James Langmead

Faculty Bibliography 2010s

Stochastic Differential Equations (SDE) are often used to model the stochastic dynamics of biological systems. Unfortunately, rare but biologically interesting behaviors (e. g., oncogenesis) can be difficult to observe in stochastic models. Consequently, the analysis of behaviors of SDE models using numerical simulations can be challenging. We introduce a method for solving the following problem: given a SDE model and a high-level behavioral specification about the dynamics of the model, algorithmically decide whether the model satisfies the specification. While there are a number of techniques for addressing this problem for discrete-state stochastic models, the analysis of SDE and other continuous-state …

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Applications Of Volume Holographic Elements In High Power Fiber Lasers, Apurva Jain Jan 2012

Applications Of Volume Holographic Elements In High Power Fiber Lasers, Apurva Jain

Electronic Theses and Dissertations

The main objective of this thesis is to explore the use of volume holographic elements recorded in photo-thermo-refractive (PTR) glass for power scaling of narrow linewidth diffraction-limited fiber lasers to harness high average power and high brightness beams. Single fiber lasers enable kW level output powers limited by optical damage, thermal effects and non-linear effects. Output powers can be further scaled using large mode area fibers, however, at the cost of beam quality and instabilities due to the presence of higher order modes. The mechanisms limiting the performance of narrow-linewidth large mode area fiber lasers are investigated and solutions using …

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A Comparative Investigation Of Career Readiness And Decidedness In First Year Stem Majoring Students Participating In A Stem Mentoring Program Imbedded In A Living-Learning Community With Focused Data On Female Stem Students, Nirmala Ramlakhan Jan 2012

A Comparative Investigation Of Career Readiness And Decidedness In First Year Stem Majoring Students Participating In A Stem Mentoring Program Imbedded In A Living-Learning Community With Focused Data On Female Stem Students, Nirmala Ramlakhan

Electronic Theses and Dissertations

Female mentoring success was investigated as an undergraduate intervention utilizing career development practices to reduce dysfunctional career thinking and STEM major retention in first year freshmen females within a living-learning community. Repeated measures MANOVAs and canonical correlations in the causal comparative research design evaluated mentoring’s influence on first year females. Male voluntary participants (n = 126) formulated the comparison group, and female voluntary participants (n = 75) filled the treatment group. Repeated measure multivariate analyses of variances compared differences between the interaction of mentoring and gender over time on dysfunctional career thinking using two assessments: Career Thoughts Inventory (CTI) and …

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Influencing Students To Become Stewards Of The Earth's Ocean, Jenifer Trimble Jan 2012

Influencing Students To Become Stewards Of The Earth's Ocean, Jenifer Trimble

Electronic Theses and Dissertations

The purpose of this action research study was to document 8th grade students' experiences at a residential marine learning facility as they discovered the interconnections between life on Earth and its dependency on ocean health. My goal was for students to take their new knowledge and share it with others in a quest to become educated and caring stewards of the Earth's ocean. Students in this study participated in open peer and instructor discussions, performed full and guided inquiry activities, and snorkeled among the shallow water habitats that transition from mangroves toward coral reefs to discover the interconnections among shallow …

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A Comparison Of Aluminum And Iron-Based Coagulants For Treatment Of Surface Water In Sarasota County, Florida, David Yonge Jan 2012

A Comparison Of Aluminum And Iron-Based Coagulants For Treatment Of Surface Water In Sarasota County, Florida, David Yonge

Electronic Theses and Dissertations

In this research, five different coagulants were evaluated to determine their effectiveness at removing turbidity, color and dissolved organic carbon (DOC) from a surface water in Sarasota County, Florida. Bench-scale jar tests that simulated conventional coagulation, flocculation, and sedimentation processes were used. Iron-based coagulants (ferric chloride and ferric sulfate) and aluminum-based coagulants (aluminum sulfate, polyaluminum chloride (PACl) and aluminum chlorohydrate (ACH)) were used to treat a highly organic surface water supply (DOC ranging between 10 and 30 mg/L), known as the Cow Pen Slough, located within central Sarasota County, Florida. Isopleths depicting DOC and color removal efficiencies as a function …

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Iron Molybdenum Cofactor: Catalyst In Dihydrogen Production And Nifen's Role In The Femo-Co Biosynthetic Pathway, Deborah Bolin Maxwell Jan 2012

Iron Molybdenum Cofactor: Catalyst In Dihydrogen Production And Nifen's Role In The Femo-Co Biosynthetic Pathway, Deborah Bolin Maxwell

Electronic Theses and Dissertations

Humankind’s tremendous industrial and technological progress over the last two centuries has been driven by the natural abundance and availability of fossil fuels. As those reserves deplete, the prudent course of action would be to develop other readily available fuel sources. Some research efforts using biomolecules involve the hydrogenases and nitrogenases with the goal of evolving dihydrogen. At the nitrogenase active site, the iron-molybdenum cofactor (FeMo-co) catalyzes the reduction of dinitrogen and protons to form ammonia and dihydrogen. Toward the goal of producing dihydrogen passively as an alternative fuel, a novel advanced material has been developed. CdSe nanoparticles complexed with …

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Low Voltage Blue Phase Liquid Crystal Displays, Linghui Rao Jan 2012

Low Voltage Blue Phase Liquid Crystal Displays, Linghui Rao

Electronic Theses and Dissertations

From cell phones, laptops, desktops, TVs, to projectors, high reliability LCDs have become indispensable in our daily life. Tremendous progress in liquid crystal displays (LCDs) has been made after decades of extensive research and development in materials, device configurations and manufacturing technology. Nowadays, the most critical issue on viewing angle has been solved using multidomain structures and optical film compensation. Slow response time has been improved to 2-5 ms with low viscosity LC material, overdrive and undershoot voltage, and thin cell gap approach. Moving image blur has been significantly reduced by impulse driving and frame insertion. Contrast ratio in excess …

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Lithographic Vertical-Cavity Surface-Emitting Lasers, Guowei Zhao Jan 2012

Lithographic Vertical-Cavity Surface-Emitting Lasers, Guowei Zhao

Electronic Theses and Dissertations

Remarkable improvements in vertical-cavity surface-emitting lasers (VCSELs) have been made by the introduction of mode- and current-confining oxide optical aperture now used commercially. However, the oxide aperture blocks heat flow inside the device, causing a larger thermal resistance, and the internal strain caused by the oxide can degrade device reliability, also the diffusion process used for the oxide formation can limit device uniformity and scalability. Oxide-free lithographic VCSELs are introduced to overcome these device limitations, with both the mode and current confined within the lithographically defined intracavity mesa, scaling and mass production of small size device could be possible. The …

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Vertical Field Switching Blue Phase Liquid Crystals For Field Sequential Color Displays, Hui-Chuan Cheng Jan 2012

Vertical Field Switching Blue Phase Liquid Crystals For Field Sequential Color Displays, Hui-Chuan Cheng

Electronic Theses and Dissertations

Low power consumption is a critical requirement for all liquid crystal display (LCD) devices. A field sequential color (FSC) LCD was proposed by using red (R), green (G) and blue (B) LEDs and removing the lossy component of color filters which only transmits ~30% of the incoming white light. Without color filters, FSC LCDs exhibit a ~3X higher optical efficiency and 3X higher resolution density as compared to the conventional color filters-based LCDs. However, color breakup (CBU) is a most disturbing defect that degrades the image quality in FSC displays. CBU can be observed in stationary or moving images. It …

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Role Of Internal Degrees Of Freedom In The Quantum Tunneling Of The Magnetization In Single-Molecule Magnets, Hajrah Quddusi Jan 2012

Role Of Internal Degrees Of Freedom In The Quantum Tunneling Of The Magnetization In Single-Molecule Magnets, Hajrah Quddusi

Electronic Theses and Dissertations

The prominent features of single molecule magnets (SMMs), such as the quantum tunneling of the magnetization (QTM), are conventionally understood through the giant spin approximation (GSA) which considers the molecule as a single rigid spin. This model often requires the inclusion of high order anisotropy terms in the Hamiltonian, a manifestation of admixing of low lying excited states that can be more naturally understood by employing a multi-spin (MS) description i.e. considering the individual spins and the interactions between ions within the molecule. However, solving the MS Hamiltonian for high nuclearity molecules is not feasible due to the enormous dimensions …

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Investigation Of Breakdown Power During Electrical Breakdown Of Aligned Array Of Carbon Nanotubes, Udai Bhanu Jan 2012

Investigation Of Breakdown Power During Electrical Breakdown Of Aligned Array Of Carbon Nanotubes, Udai Bhanu

Electronic Theses and Dissertations

Massively parallel arrays of single walled carbon nanotubes (SWNT) have attracted significant research interests because of their ability to (i) average out inhomogeneities of individual SWNTs, (ii) provide larger on currents, and (iii) reduce noise to provide higher cutoff frequency for radio frequency applications. However, the array contains both metallic and semiconducting SWNTs and the presence of metallic nanotube in an aligned array negatively affects the device properties. Therefore, it is essential to selectively remove metallic nanotubes to obtain better transistor properties. It was recently found that although such a selective removal can be effective for a low density array, …

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Evaluating Improvisation As A Technique For Training Pre-Service Teachers For Inclusive Classrooms, Theresa Becker Jan 2012

Evaluating Improvisation As A Technique For Training Pre-Service Teachers For Inclusive Classrooms, Theresa Becker

Electronic Theses and Dissertations

Improvisation is a construct that uses a set of minimal heuristic guidelines to create a highly flexible scaffold that fosters extemporaneous communication. Scholars from diverse domains: such as psychology, business, negotiation, and education have suggested its use as a method for preparing professionals to manage complexity and think on their feet. A review of the literature revealed that while there is substantial theoretical scholarship on using improvisation in diverse domains, little research has verified these assertions. This dissertation evaluated whether improvisation, a specific type of dramatic technique, was effective for training pre-service teachers in specific characteristics of teacher-child classroom interaction, …

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Electronic And Optoelectronic Transport Properties Of Carbon Nanotube/Organic Semiconductor Devices, Biddut Sarker Jan 2012

Electronic And Optoelectronic Transport Properties Of Carbon Nanotube/Organic Semiconductor Devices, Biddut Sarker

Electronic Theses and Dissertations

Organic field effect transistors (OFETs) are of significant research interest due to their promising applications in large area, low-cost electronic devices such as flexible displays, sensor arrays, and radio-frequency identification tags. A major bottleneck in fabricating highperformance OFET is the large interfacial barrier between the metal electrodes and organic semiconductors (OSC) which results in an inefficient charge injection. Carbon nanotubes (CNTs) are considered to be a promising electrode material which can address this challenge. In this dissertation, we demonstrate fabrication of high-performance OFETs using aligned array CNT electrodes and investigate the detailed electronic transport properties of the fabricated devices. The …

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Superintendent Second-Order Change Leadership To Achieve Equity And Access To Excellence In A Large Florida School District, Paul Wilhite Jan 2012

Superintendent Second-Order Change Leadership To Achieve Equity And Access To Excellence In A Large Florida School District, Paul Wilhite

Electronic Theses and Dissertations

The purpose of this study was to determine the perceptions of 244 school- and district-based administrators who were employed in a Florida school district from 2003- 2011 regarding superintendent second-order change leadership decisions and events to achieve equity and access to excellence for all students in the school district. Interviews were also conducted with 11 active and retired school-based and district-based administrators to specifically address any factors that led to equity and access to excellence as well as any challenges the school district faced when implementing those actions and decisions. Quantitative data were used for a historical comparison of the …

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High Pressure Micro-Spectroscopy Of Biological Assemblies And Cells, Sang Hoon Park Jan 2012

High Pressure Micro-Spectroscopy Of Biological Assemblies And Cells, Sang Hoon Park

Electronic Theses and Dissertations

Functional properties of living cells depend on the thermodynamic variables such as temperature and pressure. A unique tool to investigate volume effects on structure and metabolism of the cell and biomolecules is pressure perturbation. We have developed a new setup that enables micro-spectroscopy and optical imaging of individual live cells at variable pressure from 0.1 to 400 MPa. Following characterization of the setup, pressure and temperature effects on the secondary structure of the peptide Poly-L-glutamic acid (PGA) in deuterated water buffer solution were investigated. The amide I band of PGA is sensitive to pressure and temperature, and by spectral deconvolution, …

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Radiation Effects On Wide Band Gap Semiconductor Transport Properties, Casey Minna Schwarz Jan 2012

Radiation Effects On Wide Band Gap Semiconductor Transport Properties, Casey Minna Schwarz

Electronic Theses and Dissertations

In this research, the transport properties of ZnO were studied through the use of electron and neutron beam irradiation. Acceptor states are known to form deep in the bandgap of doped ZnO material. By subjecting doped ZnO materials to electron and neutron beams we are able to probe, identify and modify transport characteristics relating to these deep accepter states. The impact of irradiation and temperature on minority carrier diffusion length and lifetime were monitored through the use of the Electron Beam Induced Current (EBIC) method and Cathodoluminescence (CL) spectroscopy. The minority carrier diffusion length, L, was shown to increase as …

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The Dilemma Between Ethics, Contemporary Political-Economy And Society's Common Good: Reengaging The Stewards Of The Common Good, Kwamie Dunbar Jan 2012

The Dilemma Between Ethics, Contemporary Political-Economy And Society's Common Good: Reengaging The Stewards Of The Common Good, Kwamie Dunbar

Presidential Seminar on the Catholic Intellectual Tradition

The paper focuses on the rising gap between ethics and modern day business practices and employs recent Catholic Social Teaching and moral anthropology in order to assess the types of (value) ascriptions that can (normativelv) best define business ethics in an era of positive economics, rising levels of individualism and a shrinking “common good."

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A Joint Replication-Migration-Based Routing In Delay Tolerant Networks, Yunsheng Wang, Jie Wu, Zhen Jiang, Feng Li Jan 2012

A Joint Replication-Migration-Based Routing In Delay Tolerant Networks, Yunsheng Wang, Jie Wu, Zhen Jiang, Feng Li

Computer Science Faculty Publications

No abstract provided.

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A Quick And Reliable Routing For Infrastructure Surveillance With Wireless Sensor Networks, Zhen Jiang, Jie Wu, Minyi Guo, Zhenping Zhao, Donghong Wu Jan 2012

A Quick And Reliable Routing For Infrastructure Surveillance With Wireless Sensor Networks, Zhen Jiang, Jie Wu, Minyi Guo, Zhenping Zhao, Donghong Wu

Computer Science Faculty Publications

No abstract provided.

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Minimum Latency Broadcasting With Conflict Awareness In Wireless Sensor Networks, Zhen Jiang, Donghong Wu, Minyi Guo, Jie Wu, Robert Kline, Xin Wang Jan 2012

Minimum Latency Broadcasting With Conflict Awareness In Wireless Sensor Networks, Zhen Jiang, Donghong Wu, Minyi Guo, Jie Wu, Robert Kline, Xin Wang

Computer Science Faculty Publications

No abstract provided.

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Limnoarchaeology Using Commercially Available Side Scan Sonar: The Locks Of The Muscle Shoals Canal, Alabama, Robert Kavanaugh Jan 2012

Limnoarchaeology Using Commercially Available Side Scan Sonar: The Locks Of The Muscle Shoals Canal, Alabama, Robert Kavanaugh

Theses

No abstract provided.

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Taxing Facebook Code: Debugging The Tax Code And Software, Xuan-Thao Nguyen, Jeffrey A. Maine Jan 2012

Taxing Facebook Code: Debugging The Tax Code And Software, Xuan-Thao Nguyen, Jeffrey A. Maine

Buffalo Law Review

No abstract provided.

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Silenced Stories: How Victim Impact Evidence In Capital Trials Prevents The Jury From Hearing The Constitutionally Required Story Of The Defendant, Diana Minot Jan 2012

Silenced Stories: How Victim Impact Evidence In Capital Trials Prevents The Jury From Hearing The Constitutionally Required Story Of The Defendant, Diana Minot

Journal of Criminal Law and Criminology

No abstract provided.

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Health Effects Associated With Foreclosure: A Secondary Analysis Of Hospital Discharge Data, Nancy N. Menzel, Sheniz Moonie, Melva V. Thompson-Robinson Jan 2012

Health Effects Associated With Foreclosure: A Secondary Analysis Of Hospital Discharge Data, Nancy N. Menzel, Sheniz Moonie, Melva V. Thompson-Robinson

School of Public Health Faculty Research

Objectives. The purpose of this study was to assess the health effects of high home foreclosure rates in an area of the United States of America and the utility of hospital discharge data for this purpose. Methods.We analyzed hospital discharge data from three postal zip codes using the principal diagnosis for 25 Diagnostic Related Groups associated with stress. Descriptive statistics were used to characterize hospital discharge rates for each condition by year and zip code. To test for differences across time, the Cochran-Armitage trend test was performed. Results. Most conditions did not demonstrate a statistical change between 2005 and 2008. …

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Should The P.R.C. Favor Software And Business Method Patents?, X. Christina Huang Jan 2012

Should The P.R.C. Favor Software And Business Method Patents?, X. Christina Huang

Cybaris®

No abstract provided.

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