Physical Sciences and Mathematics Commons^™

Phase Gradient Algorithm Method For 3-D Holographic Ladar Imaging, Jason W. Stafford, Bradley D. Duncan, David J. Rabb

Electro-Optics and Photonics Faculty Publications

3-D holographic ladar uses digital holography with frequency diversity to add the ability to resolve targets in range. A key challenge is that since individual frequency samples are not recorded simultaneously, differential phase aberrations may exist between them making it difficult to achieve range compression. We describe steps specific to this modality so that phase gradient algorithms (PGA) can be applied to 3-D holographic ladar data for phase corrections across multiple temporal frequency samples. Substantial improvement of range compression is demonstrated with a laboratory experiment where our modified PGA technique is applied. Additionally, the PGA estimator is demonstrated to be …

Slides: The Murray-Darling Basin, Tony Mcleod

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenter: Tony McLeod, MDBA, Murray-Darling Basin Authority

5 slides

Slides: Dam Operations: Does A Changing World Call For Changing Plans?, Reed D. Benson

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenter: Reed D. Benson, University of New Mexico School of Law

13 slides

Slides: Learning From Drought Crises In Federations: Principles, Indicators And Lessons Learned, Lucia De Stefano, Dustin Garrick, Daniel Connell

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenters:

Lucia De Stefano, Complutense Universidad de Madrid

Dustin Garrick, McMaster University/University of Oxford

Daniel Connell, Australia National University

27 slides

Slides: Data Sharing And River Basin Modelling: From The Colorado To The Nile, Kevin Wheeler

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenter: Kevin Wheeler, University of Oxford

29 slides

Slides: Water Governance Innovation And Transnational Networks, Michele-Lee Moore

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenter: Michele-Lee Moore, Assistant Professor, Department of Geography, University of Victoria; Water, Innovation, and Global Governance Lab

10 slides

Slides: Water Allocation And Water Markets In Spain, Nuria Hernández-Mora

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenter: Nuria Hernández Mora, Universidad de Sevilla, Spain

22 slides

Slides: Drought In The Murray Darling Basin: A 100 Year Perspective, Daniel Connell

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenter: Daniel Connell, Australian National University

22 slides

Pinning Susceptibility: The Effect Of Dilute, Quenched Disorder On Jamming, Amy Lisa Graves, Samer B. Nashed , '15, Elliot S. Padgett , '13, C. P. Goodrich, A. J. Liu, J. P. Sethna

Physics & Astronomy Faculty Works

We study the effect of dilute pinning on the jamming transition. Pinning reduces the average contact number needed to jam unpinned particles and shifts the jamming threshold to lower densities, leading to a pinning susceptibility, χp. Our main results are that this susceptibility obeys scaling form and diverges in the thermodynamic limit as χp∝|ϕ−ϕ∞c|−γp where ϕ∞c is the jamming threshold in the absence of pins. Finite-size scaling arguments yield these values with associated statistical (systematic) errors γp=1.018±0.026(0.291) in d=2 and γp=1.534±0.120(0.822) in d=3. Logarithmic corrections raise the exponent in d=2 to close to the d=3 value, although the systematic errors …

Optimizing Quantization For Lasso Recovery, Xiaoyi Gu, Shenyinying Tu, Hao-Jun Michael Shi, Mindy Case, Deanna Needell, Yaniv Plan

CMC Faculty Publications and Research

This letter is focused on quantized Compressed Sensing, assuming that Lasso is used for signal estimation. Leveraging recent work, we provide a framework to optimize the quantization function and show that the recovered signal converges to the actual signal at a quadratic rate as a function of the quantization level. We show that when the number of observations is high, this method of quantization gives a significantly better recovery rate than standard Lloyd-Max quantization. We support our theoretical analysis with numerical simulations.

Performance Of Endophyte Infected Tall Fescue In Europe And North America, Kari Saikkonen, Timothy D. Phillips, Stanley H. Faeth, Rebecca L. Mcculley, Irma Saloniemi, Marjo Helander

Plant and Soil Sciences Faculty Publications

Human assisted plant invasions from Europe to North America have been more common than the reverse. We tested endophyte-mediated performance of tall fescue in parallel three year experiments in Europe and the USA using endophyte infected and uninfected wild and cultivated plants. Experimental plants were subjected to nutrient and water treatments. Whereas endophyte infection increased tall fescue performance in general, the effects of endophytes on plant growth and reproduction varied among plant origins under different environmental conditions. Naturally endophyte-free Finnish cultivar ‘Retu’ performed equally well as ‘Kentucky-31’ in both geographic locations. All Eurasian origin plants performed well in the US. …

Enzyme-Mediated And Mechanistic Investigations Of Tetrahydroisoquinoline Synthesis Through The Pictet-Spengler Reaction, Jordan Elise Fauser

College of Science and Health Theses and Dissertations

Tetrahydroisoquinolines (THI) are biologically active natural products with applications to a variety of diseases. These compounds also act as precursors for other pharmacologically active natural products. In this investigation, a new synthetic approach for generation of halogenated THIs was proposed. Using cross-linked tyrosinase aggregate, halogenated tyrosine and tyramine were oxidized to form halogenated catechols such as halogenated L-DOPA and dopamine. In a one-pot synthetic approach, the enzyme oxidation reaction was coupled to the Pictet-Spengler reaction, through the addition of an aldehyde, to generate halogenated THIs. The Pictet-Spengler reaction was catalyzed by the phosphate buffer in the reaction solution. The role …

New Prospects In Fixed Target Searches For Dark Forces With The Seaquest Experiment At Fermilab, Susan Gardner, R. J. Holt, A. S. Tadepalli

Physics and Astronomy Faculty Publications

An intense 120 GeV proton beam incident on an extremely long iron target generates enormous numbers of light-mass particles that also decay within that target. If one of these particles decays to a final state with a hidden gauge boson, or if such a particle is produced as a result of the initial collision, then that weakly interacting hidden-sector particle may traverse the remainder of the target and be detected downstream through its possible decay to an e⁺ e⁻, μ⁺ μ⁻, or π⁺ π⁻ final state. These conditions can be realized through …

Anisotropic Softening Of Magnetic Excitations In Lightly Electron-Doped Sr2Iro4, X. Liu, M. P. M. Dean, Z. Y. Meng, M. H. Upton, T. Qi, T. Gog, Y. Cao, J. Q. Lin, D. Meyers, H. Ding, Gang Cao, J. P. Hill

Center for Advanced Materials Faculty Publications

The magnetic excitations in electron-doped (Sr_1−xLa_x)₂IrO₄ with x = 0.03 were measured using resonant inelastic x-ray scattering at the Ir L₃ edge. Although much broadened, well defined dispersive magnetic excitations were observed. Comparing with the magnetic dispersion from the undoped compound, the evolution of the magnetic excitations upon doping is highly anisotropic. Along the antinodal direction, the dispersion is almost intact. On the other hand, the magnetic excitations along the nodal direction show significant softening. These results establish the presence of strong magnetic correlations in electron-doped (Sr_1−xLa_{x …}

Characterization Of Simplices Via The Bezout Inequality For Mixed Volumes, Christos Saroglou, Ivan Soprunov, Arten Zvavitch

Mathematics and Statistics Faculty Publications

We consider the following Bezout inequality for mixed volumes: V (K1, . . . ,Kr, Δ[n − r])Vn(Δ)r−1 ≤ r i=1 V (Ki, Δ[n − 1]) for 2 ≤ r ≤ n. It was shown previously that the inequality is true for any -dimensional simplex and any convex bodies in . It was conjectured that simplices are the only convex bodies for which the inequality holds for arbitrary bodies in . In this paper we prove that this is indeed the case if we assume that is a convex polytope. Thus the Bezout inequality characterizes simplices in the class of …

A Communication Protocol For Nanogrids And Its Application In Off-Grid Rural Areas Of Developing Countries, Sowmya Srikanth

USF Tampa Graduate Theses and Dissertations

In a developing country such as India, 44% of the population does not have access to power and for many others, the power supply is unreliable. A nanogrid, defined as “a single domain for voltage, reliability and administration”, is a possible solution to distribute power to such off-grid areas. Built from the bottom up, nanogrids have the ability to function independently, using locally generated power (such as solar power) as the power source. Such grids enable residents to lead more productive lives, with improved access to power. This thesis designs a new communication protocol for nanogrids to enable matching demand …

J/Ψ Production At Low Transverse Momentum In P + P And D + Au Collisions At √SNn = 200 Gev, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, A. Aparin, D. Arkhipkin, E. C. Aschenauer, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, I. Bunzarov, J. Butterworth, H. Caines, M. Calderón De La Barca Sánchez, J. M. Campbell, D. Cebra, Renee H. Fatemi, Suvarna Ramachandran

Physics and Astronomy Faculty Publications

We report on the measurement of J/ψ production in the dielectron channel at midrapidity (|y| < 1) in p + p and d + Au collisions at √^s_NN = 200 GeV from the STAR experiment at the Relativistic Heavy Ion Collider. The transverse momentum p_Tspectra in p + p for p_T < 4 GeV/c and d + Au collisions for p_T < 3 GeV/c are presented. These measurements extend the STAR coverage for J/ψ production in p + p collisions to low p_T. The ⟨p²_T⟩ from the measured J/ψ invariant …

Biomimetic Tools In Oxidative Metabolism: Characterization Of Reactive Metabolites From Antithyroid Drugs, Kudzanai Chipiso

Dissertations and Theses

Toxicities of sulfur-based drugs have been attributed to formation of highly reactive sulfur oxo-acids and depletion of glutathione by the formation of reactive metabolites. Metabolic activation of these sulfur centers to conceivably toxic reactive metabolites (RMs) that can covalently modify proteins is considered the initial step in drug-induced toxicity. Despite considerable effort and research, detection and characterization of these RMs during drug development and therapy remains a challenge. Methimazole (MMI) and 6-propyl-2-thiouracil (PTU) are two commonly used antithyroid, sulfur-based drugs. Though effective, these drugs are associated with idiosyncratic toxicity. PTU has acquired a black box warning and physicians are calling …

Intestinal Microbiota-Generated Metabolite Trimethylamine-N-Oxide And 5-Year Mortality Risk In Stable Coronary Artery Disease: The Contributory Role Of Intestinal Microbiota In A Courage-Like Patient Cohort, Vichai Senthong, Zeneng Wang, Xinmin S. Li, Yiying Fan, Yuping Wu, W. H. Wilson Tang, Stanley L. Hazen

Mathematics and Statistics Faculty Publications

Background: Trimethylamine-N-oxide (TMAO), a metabolite derived from gut microbes and dietary phosphatidylcholine, is linked to both coronary artery disease pathogenesis and increased cardiovascular risks. The ability of plasma TMAO to predict 5-year mortality risk in patients with stable coronary artery disease has not been reported. This study examined the clinical prognostic value of TMAO in patients with stable coronary artery disease who met eligibility criteria for a patient cohort similar to that of the Clinical Outcomes Utilizing Revascularization and Aggressive Drug Evaluation (COURAGE) trial. Methods and Results: We examined the relationship between fasting plasma TMAO and all-cause mortality over 5-year …

A Cyclic Universe Approach To Fine Tuning, Stephon Alexander, Sam Cormack, Marcelo Gleiser

Dartmouth Scholarship

We present a closed bouncing universe model where the value of coupling constants is set by the dynamics of a ghost-like dilatonic scalar field. We show that adding a periodic potential for the scalar field leads to a cyclic Friedmann universe where the values of the couplings vary randomly from one cycle to the next. While the shuffling of values for the couplings happens during the bounce, within each cycle their time-dependence remains safely within present observational bounds for physically-motivated values of the model parameters. Our model presents an alternative to solutions of the fine tuning problem based on string …

Identification Of Woodland Vernal Pools With Seasonal Change Palsar Data For Habitat Conservation, Laura Bourgeau-Chavez, Yu Man Lee, Michael Battaglia, Sarah L. Endres, Zachary Laubach, Kirk Scarbrough

Michigan Tech Publications, Part 1

Woodland vernal pools are important, small, cryptic, ephemeral wetland ecosystems that are vulnerable to a changing climate and anthropogenic influences. To conserve woodland vernal pools for the state of Michigan USA, vernal pool detection and mapping methods were sought that would be efficient, cost-effective, repeatable and accurate. Satellite-based L-band radar data from the high (10 m) resolution Japanese ALOS PALSAR sensor were evaluated for suitability in vernal pool detection beneath forest canopies. In a two phase study, potential vernal pool (PVP) detection was first assessed with unsupervised PALSAR (LHH) two season change detection (spring when flooded—summer when dry) and validated …

Chemically Accurate Simulation Of A Polyatomic Molecule-Metal Surface Reaction, Francesco Nattino, Davide Migliorini, Geert-Jan Kroes, Eric Dombrowski, Eric A. High High, Daniel Killelea, Arthur Utz

Chemistry: Faculty Publications and Other Works

Although important to heterogeneous catalysis, the ability to accurately model reactions of polyatomic molecules with metal surfaces has not kept pace with developments in gas phase dynamics. Partnering the specific reaction parameter (SRP) approach to density functional theory with ab initio molecular dynamics (AIMD) extends our ability to model reactions with metals with quantitative accuracy from only the lightest reactant, H2, to essentially all molecules. This is demonstrated with AIMD calculations on CHD3 + Ni(111) in which the SRP functional is fitted to supersonic beam experiments, and validated by showing that AIMD with the resulting functional reproduces initial-state selected sticking …

Cosm News, Georgia Southern University

College of Science & Mathematics: News & Publications (2012-2022)

• The Evolution of Mimicry

A Behavioural Account Of Mobile Gambling, Richard James, Richard Tunney, Claire O'Malley

International Conference on Gambling & Risk Taking

Mobile gambling is an emerging market in which there is evidence that some gamblers are introduced to gambling through their mobile device, and that mobile gambling does not ‘cannibalise’ participation with other forms of gambling. There is a concern that mobile gamblers face distinct risks from other forms of gambling, particularly for harmful behaviours. This paper presentation outlines a behavioural account of mobile gambling that combines both the learned characteristics of problem gambling with how individuals interact with their mobile devices. This hypothesizes that the extended gaps between plays or sessions potentially attracts extended play, even in the face of …

Ready, Set, And Go Back: The Role Of The Judiciary In Brazil’S Bingo Ban, Luiza Jobim Llm, Toni Williams

International Conference on Gambling & Risk Taking

Brazil, the host of the 2014 World Cup and the 2016 Olympics, is known for strong competitive traditions in sports and games. It is also one of only three G-20 countries (together with Saudi Arabia and Indonesia) that currently bans non-state provision of gambling products. Bingo was a notable exception to this prohibition, after enabling legislation was enacted in 1993, with the intention that proceeds would help fund national sports development. The game quickly became very popular but there were persistent questions about, and contestations over, the capacity of the regulatory framework to control the dual risks of exploitation of …

The Future Of Gambling Spaces: Esports And The World Of Competitive Video Gaming, Brett Abarbanel, Bryce Blum, Chris Grove, Carson Knuth, Seth Schorr, Rahul Sood

International Conference on Gambling & Risk Taking

eSports, or competitive video gaming, are a rapidly developing segment of sport and gaming. eSports are a unique cultural and economic phenomenon, and only recently is this nascent industry garnering substantial attention from gambling operators, regulators, and researchers. In 2015, an estimated quarter of a billion dollars will be wagered on eSports, a number projected to grow to $23 billion by 2020 (Eilers Research, 2015).

This panel presentation will provide a general overview of eSports, including some background on the industry, a description of the market and general business model, information about the gambling opportunities within eSports, sponsorship opportunities and …

Profiling At-Risk Gamblers, Tapio Jaakkola, Kari Vuorinen, Mirka Smolej

International Conference on Gambling & Risk Taking

The majority of gambling research has been concentrating on problem gambling and on the association between gambling behavior, game design and gambling harm. Much less attention has been directed at recreational gambling or on players that do not suffer from any gambling related problems. However, when it comes to preventing gambling harm we should also target those at risk as well those who are gambling moderately.

As a part of a project on prevention of adult gambling harm we did a study of at-risk gamblers in order to recognize and to define the socio-economic background of our target group. Prior …

Self-Correcting Kelly Strategies For Skeptical Traders, Aaron C. Brown

International Conference on Gambling & Risk Taking

The Kelly criterion gives the appropriate bet size in idealized situations with known parameters. In financial trading situations parameters are generally unknown and the mathematical assumptions underlying the Kelly proof are not met precisely. Moreover a risk manager typically must cooperate with a trader who may be skeptical about both the Kelly criterion specifically and the concept of mathematical optimization of bet size in general.

This presentation tackles the problem of designing a Kelly-based system for setting trade risk management parameters that is both self-correcting (the system delivers good results even if initial parameter are misestimated or parameters change) and …

Estimating The Fraction Of The Kelly Bet, William Chin, Marc Ingenoso

International Conference on Gambling & Risk Taking

It is well known that an advantage gambler maximizes the average geometric growth rate by using Kelly betting. If the advantage is known precisely, then one can to use Full Kelly betting or, more commonly, some fraction of it. Systematic gamblers may have an advantage, but may not know exactly how large it is. This may be the case for e.g. sports bettors, blackjack and poker players and future traders. We show how they can estimate the fraction of full Kelly they have been employing, from their past results. This ongoing process enables them to select future bet sizing scientifically …

Measuring Market Saturation In The U.S. Casino Industry: An Analytical And Empirical Analysis, Clyde W. Barrow, Alan P. Meister, David R. Borges

International Conference on Gambling & Risk Taking

The national and regional economies in the U.S. remain on a slow growth trajectory, while the casino gaming industry has seen a rapid and ongoing expansion. Consequently, states, Native American tribes, and gaming operators have increasingly shifted their attention from gaming expansion to the problems of regional competition, cannibalization, market maturation, and market saturation. The question of “market saturation” has become a salient point of public policy debate and a topic that is now frequently raised in the industry and media. This paper analyzes the concept of saturation in the context of casino gaming markets and compares several metrics for …