Physical Sciences and Mathematics Commons^™

Spectral Multipliers For The Dunkl Laplacian, Sallam Hassani, Mohamed Sifi

Communications on Stochastic Analysis

No abstract provided.

The Itô Formula For A New Stochastic Integral, Hui-Hsiung Kuo, Anuwat Sae-Tang, Benedykt Szozda

Communications on Stochastic Analysis

No abstract provided.

A Representation For Positive Functionals Of A Brownian Motion And An Application, P Sundar, Ming Tao

Communications on Stochastic Analysis

No abstract provided.

Numerical Methods For Optimal Insurance Demand Under Marked Point Processes Shocks, Mohamed Mnif

Communications on Stochastic Analysis

No abstract provided.

Clark-Ocone Formula By The S-Transform On The Poisson White Noise Space, Yuh-Jia Lee, Nicolas Privault, Hsin-Hung Shih

Communications on Stochastic Analysis

No abstract provided.

Bose-Einstein Condensation: A Transition To Chaos Result, Stefania Ugolini

Communications on Stochastic Analysis

No abstract provided.

Cauchy Problem And Integral Representation Associated To The Power Of The Qwn-Euler Operator, Aymen Ettaieb, Habib Ouerdiane, Hafedh Rguigui

Communications on Stochastic Analysis

No abstract provided.

Generalized Field Operator Associated To The Fractional Lévy Processes, Mounir Dahwathi, Souheyl Jendoubi, Habib Ouerdiane, Anis Riahi

Communications on Stochastic Analysis

No abstract provided.

Backward Stochastic Differential Equations With Respect To General Filtrations And Applications To Insider Finance, Bernt Øksendal, Tusheng Zhang

Communications on Stochastic Analysis

No abstract provided.

Lieb-Thirring Bound For Schrödinger Operators With Bernstein Functions Of The Laplacian, Fumio Hiroshima, József Lorinczi

Communications on Stochastic Analysis

No abstract provided.

The Feynman Integrand For The Charged Particle In A Constant Magnetic Field As White Noise Distribution, Wolfgang Bock, Martin Grothaus, Sebastian Jung

Communications on Stochastic Analysis

No abstract provided.

Modelling Three-Phase Flow In Metallurgical Processes, Christoph Goniva, Gijsbert Wierink, Kari Heiskanen, Stefan Pirker, Christoph Kloss

Gijsbert Wierink

The interaction between gasses, liquids, and solids plays a critical role in many processes, such as coating, granulation and the blast furnace process. In this paper we present a comprehensive numerical model for three phase flow including droplets, particles and gas. By means of a coupled Computational Fluid Dynamics (CFD) - Discrete Element Method (DEM) approach the physical core phenomena are pictured at a detailed level. Sub-models for droplet deformation, breakup and coalescence as well as droplet-particle and wet particle-particle interaction are applied. The feasibility of this model approach is demonstrated by its application to a rotating drum coater. The …

Mapping The Surface Characteristics Of The Mojave With Remote Sensing For Terrestrial Habitat Modeling, Scott A. Nowicki

Scott A Nowicki

High-resolution ecological and climate modeling requires quantification of surface characteristics such as rock abundance, soil induration and surface roughness at fine-scale, since these features can affect the micro and macro habitat of a given area and ultimately determine the assemblage of plant and animal species that may occur there. Our objective is to develop quantitative data layers of thermophysical properties of the entire Mojave Desert Ecoregion for applications to habitat modeling being conducted by the USGS Western Ecological Research Center. These research efforts are focused on developing habitat models and a better physical understanding of the Mojave Desert, which have …

Numerical Solution Of A Reaction-Diffusion System With Fast Reversible Reaction By Using Adomian’S Decomposition Method And He’S Variational Iteration Method, Ann J. Al-Sawoor Ph.D., Mohammed O. Al-Amr M.Sc.

Mohammed O. Al-Amr

In this paper, the approximate solution of a reaction-diffusion system with fast reversible reaction is obtained by using Adomian decomposition method (ADM) and variational iteration method (VIM) which are two powerful methods that were recently developed. The VIM requires the evaluation of the Lagrange multiplier, whereas ADM requires the evaluation of the Adomian polynomials. The behavior of the approximate solutions and the effects of different values of t are shown graphically.

Effects Of Elevated Carbon Dioxide And Increased Temperature On Methane And Nitrous Oxide Fluxes: Evidence From Field Experiments, Feike A. Dijlstra, Stephen A. Prior, G. Brett Renion, H. Allen Torbert, Hanqin Tian, Chaoqun (Crystal) Lu, Rodney T. Venterea

Chaoqun (Crystal) Lu

Climate change could alter terrestrial ecosystems, which are important sources and sinks of the potent green-house gases (GHGs) nitrous oxide (N2O) and methane (CH4), in ways that either stimulate or decrease the magnitude and duration of global warming. Using manipulative field experiments, we assessed how N2O and CH4 soil fluxes responded to a rise in atmospheric carbon dioxide (CO2) concentration and to increased air temperature. Nitrous oxide and CH4 responses varied greatly among studied ecosystems. Elevated CO2 often stimulated N2O emissions in fertilized systems and CH4 emissions in wetlands, peatlands, and rice paddy fields; both effects were stronger in clayey …

Decision Making Under Interval Uncertainty (And Beyond), Vladik Kreinovich

Departmental Technical Reports (CS)

To make a decision, we must find out the user's preference, and help the user select an alternative which is the best -- according to these preferences. Traditional utility-based decision theory is based on a simplifying assumption that for each two alternatives, a user can always meaningfully decide which of them is preferable. In reality, often, when the alternatives are close, the user is often unable to select one of these alternatives. In this chapter, we show how we can extend the utility-based decision theory to such realistic (interval) cases.

F-Transform In View Of Trend Extraction, Irina Perfilieva, Vladik Kreinovich, Vilém Novák

Departmental Technical Reports (CS)

In the analysis of time series, it is important to decompose the original values into trend, cycle, seasonal component, and noise. In this paper, we provide a theoretical justification of the fact that the F-transform can be used for this purpose. We formulate "natural" requirements on the trend extraction procedure and then show that the inverse F-transform fulfils all of them.

Metrological Self-Assurance Of Data Processing Software, Vladik Kreinovich, Leonid Reznik, Konstantin K. Semenov, Gennady N. Solopchenko

Departmental Technical Reports (CS)

The metrological self-assurance for data processing software is discussed. The way to achieve this property for software is presented.

Host Guest Complexes Of Pentiptycene Receptors Display Edge-To-Face Interaction, Lorenzo Mosca, Petr Koutník, Vincent M. Lynch, Grigory V. Zyryanov, Nina A. Esipenko, Pavel Anzenbacher Jr.

Chemistry Faculty Publications

The pentiptycene receptors form edge-to-face complexes with a variety of aromatic guests including nitroaromatics. X-ray diffractometry revealed that compounds 1, 2, and 3 form host-guest assemblies with a thienyl fragment (from a neightboring molecule of 1), benzene and nitrobenzene, respectively. X-ray studies of the three crystal structures reported here strongly suggest the edge-to-face to be a predominant binding mode between the aromatic guests and electron-rich faces of the pentiptycene aromatic cavity.

Dependently Typed Programming With Singletons, Richard A. Eisenberg, Stephanie Weirich

Computer Science Faculty Research and Scholarship

Haskell programmers have been experimenting with dependent types for at least a decade, using clever encodings that push the limits of the Haskell type system. However, the cleverness of these encodings is also their main drawback. Although the ideas are in- spired by dependently typed programs, the code looks significantly different. As a result, GHC implementors have responded with ex- tensions to Haskell’s type system, such as GADTs, type families, and datatype promotion. However, there remains a significant dif- ference between programming in Haskell and in full-spectrum de- pendently typed languages. Haskell enforces a phase separation be- tween runtime values …

Microfluidic Experiments Reveal That Antifreeze Proteins Bound To Ice Crystals Suffice To Prevent Their Growth, Yeliz Celik, Ran Drori, Natalya Pertaya-Braun, Aysun Altan, Tyler Barton, Maya Bar-Dolev, Alex Groisman, Peter L. Davies, Ido Braslavsky

Physics Faculty Research

Antifreeze proteins (AFPs) are a subset of ice-binding proteins that control ice crystal growth. They have potential for the cryopreservation of cells, tissues, and organs, as well as for production and storage of food and protection of crops from frost. However, the detailed mechanism of action of AFPs is still unclear. Specifically, there is controversy regarding reversibility of binding of AFPs to crystal surfaces. The experimentally observed dependence of activity of AFPs on their concentration in solution appears to indicate that the binding is reversible. Here, by a series of experiments in temperature-controlled microfluidic devices, where the medium surrounding ice …

Sustainable Municipal Operations: Independence, Oregon, Portland State University. Hatfield School Of Government. Center For Public Service, Ed Gallagher, Dave Rouse, Dennis Kurtz, Tanya Johnston

Center for Public Service Publications and Reports

Portland State University, Hatfield School of Government (PSU), and Northwest Energy Efficiency Alliance (NEEA), has formed a partnership to develop Sustainable Municipal Operations Plans that documents sustainability and energy management best practices. The goal of this partnership is to determine how a City/municipality can actively manage energy as a controllable expense by following a predetermined operation protocol. The PSU team developed a framework of best practices for sustainable municipal operations in different categories including facilities, fleet, purchasing, operations and the work environment. After identifying pilot jurisdictions, the team applied these best practices to the current operations of local governments in …

Trends In The Ams Education Symposium And Highlights From 2012, Rajul Pandya, Donna Charlevoix, Eugene Cordero, David Smith, Sepi Yalda

Faculty Publications, Meteorology and Climate Science

The Department of Meteorology (now Atmospheric Sciences) at the University of Utah faced reductions in state funding in 2008 that reduced support for nontenured instructors at the same time that the faculty were becoming increasingly successful obtaining federally supported research grants. A faculty retreat and subsequent discussions led to substantive curriculum changes to modernize the curriculum, enhance course offerings for undergraduate and graduate students, and improve the overall efficiency of the academic program. Maintaining discipline standards and existing teaching loads were important constraints on these changes. Key features of the curriculum revisions for undergraduate majors included eliminating a very rigid …

Using Marine Snails To Teach Biogeography And Macroevolution: The Role Of Larvae And Dispersal Ability In The Evolution And Persistence Of Species, Jonathan R. Hendricks

Faculty Publications

While some marine animals are capable of traveling great distances, many have limited mobility as adults and spend the majority of their lifetimes in a small geographical area or may even be cemented to a single place. While it might be expected that species with limited mobility would have small geographic distributions, some nevertheless occur over very large areas. This is the case for some marine snails (gastropods). A key factor that impacts the geographic distribution of marine snails is the type of larvae they have during the phase of their life history that follows hatching from an egg. Because …

Development Of A Novel Technique For Predicting Tumor Response In Adaptive Radiation Therapy, Rebecca Marie Seibert

Doctoral Dissertations

This dissertation concentrates on the introduction of Predictive Adaptive Radiation Therapy (PART) as a potential method to improve cancer treatment. PART is a novel technique that utilizes volumetric image-guided radiation therapy treatment (IGRT) data to actively predict the tumor response to therapy and estimate clinical outcomes during the course of treatment. To implement PART, a patient database containing IGRT image data for 40 lesions obtained from patients who were imaged and treated with helical tomotherapy was constructed. The data was then modeled using locally weighted regression. This model predicts future tumor volumes and masses and the associated confidence intervals based …

Discrete Sparse Fourier Hermite Approximations In High Dimensions, Ashley Prater

Mathematics - Dissertations

In this dissertation, the discrete sparse Fourier Hermite approximation of a function in a specified Hilbert space of arbitrary dimension is defined, and theoretical error bounds of the numerically computed approximation are proven. Computing the Fourier Hermite approximation in high dimensions suffers from the well-known curse of dimensionality. In short, as the ambient dimension increases, the complexity of the problem grows until it is impossible to numerically compute a solution. To circumvent this difficulty, a sparse, hyperbolic cross shaped set, that takes advantage of the natural decaying nature of the Fourier Hermite coefficients, is used to serve as an index …

The Path To An Orally Administered Protein Therapeutic For The Treatment Of Diabetes Mellitus, Susan Clardy James

Chemistry - Dissertations

Protein therapeutics like insulin and glucagon-like peptide-1 analogues are currently used as injectable medications for the treatment of diabetes mellitus. An orally administered protein therapeutic is predicted to increase patient adherence to medication and bring a patient closer to metabolic norms through direct effects on hepatic glucose production. The major problem facing oral delivery of protein therapeutics is gastrointestinal tract hydrolysis/proteolysis and the inability to passage the enterocyte. Herein we report the potential use of vitamin B₁₂ for the oral delivery of protein therapeutics.

We first investigated the ability of insulin to accommodate the attachment of B₁₂ at …

Synthesis, Design, And Biological Evaluation Of Inhibitors And Activators Of Src Homology 2 Domain-Containing Inositol Phosphatase (Ship) And Synthetic Studies Of Apicularen A And Maoecrystal V, Dennis Racca Viernes

Chemistry - Dissertations

This dissertation involves work both on the syntheses of small molecules with potential therapeutic applications and synthetic studies on natural products with unusual core skeletons.

The first part of this work involves the synthesis, design, and biological evaluation of aminosteroids as inhibitors for the SH2-containing inositol phosphatase 1 (SHIP1). SHIP1, a 145 kDa protein, is involved in regulating the formation of new blood cells. High- throughput screening identified several SHIP inhibitors including NSC23922, a mixture of 3a- and 3β-aminocholestane. Both 3a- and 3β-aminocholestane were synthesized from dihdyrocholesterol and the 3a- form was verified as …

A Search For Wimp Dark Matter Using An Optimized Chi-Square Technique On The Final Data From The Cryogenic Dark Matter Search Experiment (Cdms Ii)., Manungu Joseph Kiveni

Physics - Dissertations

During the last two decades, cosmology has become a precision observational science thanks (in part) to the incredible number of experiments performed to better understand the composition of the universe. The large amount of data accumulated strongly indicates that the bulk of the universe’s matter is in the form of nonbaryonic matter that does not interact electromagnetically. Combined evidence from the dynamics of galaxies and galaxy clusters confirms that most of the mass in the universe is not composed of any known form of matter. Measurements of the cosmic microwave background, big bang nucleosynthesis and many other experiments indicate that …

Synergy And Its Limits In Managing Information Technology Professionals, Thomas W. Ferratt, Jayesh Prasad, Harvey Enns

MIS/OM/DS Faculty Publications

We examine the effects of human resource management (HRM) practices (e.g., career development, social support, compensation, and security) on IT professionals‟ job search behavior. Job search is a relatively novel dependent variable in studies of voluntary withdrawal behavior, in general, and for IT professionals, in particular. From a universalistic perspective, HRM practices individually and in combination exhibit independently additive effects on job search behavior. Our study contrasts this perspective with configurational theory, hypothesizing that proposed idealtype configurations of HRM practices have synergistic effects on job search behavior. We contribute to the IT and broader HRM literature by theoretically explicating and …