Physical Sciences and Mathematics Commons^™

K-Theory And Pseudospectra For Topological Insulators [Dataset], Terry A. Loring

Math and Statistics Datasets

We derive formulas and algorithms for Kitaev's invariants in the periodic table for topological insulators and superconductors for finite disordered systems on lattices with boundaries. We find that K-theory arises as an obstruction to perturbing approximately compatible observables into compatible observables. We derive formulas in all symmetry classes up to dimension two, and in one symmetry class in dimension three, that can be computed with sparse matrix algorithms. We present algorithms in two symmetry classes in 2D and one in 3D and provide illustrative studies regarding how these algorithms can detect the scaling properties of phase transitions.

The Fierce Green Fire: Vol 5 Issue 13, Wofford College Environmental Studies Program

The Fierce Green Fire

No abstract provided.

Sensorless Sensing With Wifi, Zimu Zhou, Chenshu Wu, Zheng Yang, Yunhao Liu

Research Collection School Of Computing and Information Systems

Can WiFi signals be used for sensing purpose? The growing PHY layer capabilities of WiFi has made it possible to reuse WiFi signals for both communication and sensing. Sensing via WiFi would enable remote sensing without wearable sensors, simultaneous perception and data transmission without extra communication infrastructure, and contactless sensing in privacypreserving mode. Due to the popularity of WiFi devices and the ubiquitous deployment of WiFi networks, WiFi-based sensing networks, if fully connected, would potentially rank as one of the world’s largest wireless sensor networks. Yet the concept of wireless, sensorless and contactless sensing is no simple combination of WiFi …

Role Of Engineering In Sustainable Water Management, Balázs M. Fekete, János J. Bogárdi

Publications and Research

The recognition of the limits of resources is almost as old as the realization that our planet is a sphere leading to concerns about sustainable resources management. Water resources in particular receive growing attention given its uneven distribution in many parts of the world. Engineering solutions to address water management challenges played significant roles in the past in areas such as access to clean water and sanitation, providing water for irrigation, offering protection against floods, allowing power generation, etc. Despite their proven benefits, engineering solutions are receiving increasing criticism due to their negative environmental and societal impacts and the high …

Functional Expression And Characterization Of A Truncated Candida Antarctica Lipase B In Yeast, Samantha Robinson

Theses and Dissertations

Candida antarctica lipase B is an enzyme capable of hydrolyzing ester bonds in a lipid-water interface with potential to become a useful biocatalyst for production of biodiesel fuel. Enzymatically catalyzing the transesterification of triacylglycerides to produce fatty acid alkyl esters (biodiesel) is an environmentally cleaner alternative to the current process which utilizes chemical reagents as catalysts. Optimization and development of strains to express highly active, stable, large quantities of these biocatalysts is essential for inexpensive production of biodiesel. Additionally, lipase enzymes can be immobilized onto a resin, eliminating the need to recover the catalyst from the product and allowing multiple …

A Proposed Model For The Approach To Augmented Reality Deployment In Marketing Communications, Stephen O'Mahony

Dept. of Marketing & International Business Conference Material

In the contemporary landscape, human interaction is characterized by the pervasive mediation of intelligent agents. Owing to advances in computer science and engineering, phenomena once limited to fixed locations are metamorphosing from extraneous entities to implicit components of the everyday. Computing power has simultaneously enhanced and miniaturized to the extent that contemporary consumer devices demonstrate power equivalent to or greater than that of personal computers of recent memory. At the same time, network connectivity has proliferated to ubiquitous levels, reflected in the fact that the amount of inanimate objects connected to the Internet has recently surpassed the human population of …

The Use Of A Statistical Model Of Storm Surge As A Bias Correction For Dynamical Surge Models And Its Applicability Along The U.S. East Coast, Haydee Salmun, Andrea Molod

Publications and Research

The present study extends the applicability of a statistical model for prediction of storm surge originally developed for The Battery, NY in two ways: I. the statistical model is used as a biascorrection for operationally produced dynamical surge forecasts, and II. the statistical model is applied to the region of the east coast of the U.S. susceptible to winter extratropical storms. The statistical prediction is based on a regression relation between the “storm maximum” storm surge and the storm composite significant wave height predicted ata nearby location. The use of the statistical surge prediction as an alternative bias correction for …

Analysis Of The Surface Density And Reactivity Of Perfluorophenylazide And The Impact On Ligand Immobilization, Gilad Zorn, David G. Castner, Anuradha Tyagi, Xin Wang, Hui Wang, Mingdi Yan

Chemistry Faculty Publications and Presentations

Perfluorophenylazide (PFPA) chemistry is a novel method for tailoring the surface properties of solid surfaces and nanoparticles. It is general and versatile, and has proven to be an efficient way to immobilize graphene, proteins, carbohydrates, and synthetic polymers. The main thrust of this work is to provide a detailed investigation on the chemical composition and surface density of the PFPA tailored surface. Specifically, gold surfaces were treated with PFPA-derivatized (11-mercaptoundecyl) tetra(ethylene glycol) (PFPA-MUTEG) mixed with 2-[2-(2-mercaptoethoxy)ethoxy]ethanol (MDEG) at varying solution mole ratios. Complementary analytical techniques were employed to characterize the resulting films including Fourier transform infrared spectroscopy to detect fingerprints …

A Unified And Preserved Dirichlet Boundary Treatment For The Cell-Centered Finite Volume Discrete Boltzmann Method, Leitao Chen, Laura A. Schaefer

Publications

A new boundary treatment is proposed for the finite volume discrete Boltzmann method (FVDBM) that can be used for accurate simulations of curved boundaries and complicated flow conditions. First, a brief review of different boundary treatments for the general Boltzmann simulations is made in order to primarily explain what type of boundary treatment will be developed in this paper for the cell-centered FVDBM. After that, the new boundary treatment along with the cell-centered FVDBM model is developed in detail. Next, the proposed boundary treatment is applied to a series of numerical tests with a detailed discussion of its qualitative and …

Agenda: Seeds Of Change: Responding To Global Change In A Bottom-Up World, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment, University Of Colorado Boulder. School Of Law, Posner Center For International Development, Resolve (Firm), Newmont Mining Corporation

Seeds of Change: Responding to Global Change in a Bottom-Up World (Martz Winter Symposium, February 12-13)

Sponsors: Posner Center for International Development, RESOLVE, Inc., Newmont Mining Corporation, and Getches-Wilkinson Center for Natural Resources, Energy, and the Environment.

Conference moderators, panelists and speakers included University of Colorado Law School professors Phil Weiser, Sarah Krakoff, Britt Banks, and Lakshman Guruswamy.

This conference is made possible through the generous support of donors who sponsored this year’s Martz Sustainability Symposium (including Newmont Mining Corporation) and those who have invested in our Clyde O. Martz Endowed Fund for Natural Resources Management (including Brian Dolan and Davis Graham and Stubbs LLP). The Martz Natural Resources Management Fund was established in the memory …

Bending Of Light In Quantum Gravity, N.E.J. Bjerrum-Bohr, John F. Donoghue, Barry R. Holstein, Ludovic Planté, Pierre Vanhove

Barry R Holstein

We consider the scattering of lightlike matter in the presence of a heavy scalar object (such as the Sun or a Schwarzschild black hole). By treating general relativity as an effective field theory we directly compute the nonanalytic components of the one-loop gravitational amplitude for the scattering of massless scalars or photons from an external massive scalar field. These results allow a semiclassical computation of the bending angle for light rays grazing the Sun, including long-range ℏ contributions. We discuss implications of this computation, in particular the violation of some classical formulations of the equivalence principle.

Living Up To Sustainability, Abby Jahiel, Given Harper

Given Harper

No abstract provided.

Letter To The Strategic Planning Committee, Abby Jahiel, Given Harper

Given Harper

No abstract provided.

Galaxy Zoo: Are Bars Responsible For The Feeding Of Active Galactic Nuclei At 0.2 < Z < 1.0?, Edmond Cheung, Jonathan R. Trump, E. Athanassoula, Steven P. Bamford, Eric F. Bell, A. Bosma, Carolin N. Cardamone, Kevin R. V. Casteels, S. M. Faber, Jerome J. Fang, Lucy F. Fortson, Dale D. Kocevski, David C. Koo, Seppo Laine, Chris Lintott, Karen L. Masters, Thomas Melvin, Robert C. Nichol, Kevin Schawinski, Brooke Simmons, Rebecca Smethurst, Kyle W. Willett

Physics and Astronomy Faculty Publications

We present a new study investigating whether active galactic nuclei (AGN) beyond the local universe are preferentially fed via large-scale bars. Our investigation combines data from Chandra and Galaxy Zoo: Hubble (GZH) in the AEGIS (All-wavelength Extended Groth strip International Survey), COSMOS (Cosmological Evolution Survey), and (Great Observatories Origins Deep Survey-South) GOODS-S surveys to create samples of face-on, disc galaxies at 0.2 < z < 1.0. We use a novel method to robustly compare a sample of 120 AGN host galaxies, defined to have 10⁴² erg s⁻¹ < L_X < 10⁴⁴ erg s⁻¹, with inactive control galaxies matched in stellar mass, rest-frame colour, size, Sérsic index, and redshift. Using the GZH bar classifications of each sample, we demonstrate that …

Deconstructing The Galaxy Stellar Mass Function With Ukidss And Candels: The Impact Of Colour, Structure And Environment, Alice Mortlock, Christopher J. Conselice, William G. Hartley, Ken Duncan, Caterina Lani, Jamie R. Owensworth, Omar Almaini, Arjen Van Der Wel, Kuang-Han Huang, Matthew L.N. Ashby, S. P. Willner, Adriano Fontana, Avishai Dekel, Anton M. Koekemoer, Harry C. Ferguson, Sandra M. Faber, Norman A. Grogin, Dale D. Kocevski

Physics and Astronomy Faculty Publications

We combine photometry from the Ultra Deep Survey (UDS), Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) UDS and CANDELS the Great Observatories Origins Deep Survey-South (GOODS-S) surveys to construct the galaxy stellar mass function probing both the low- and high-mass end accurately in the redshift range 0.3 < z < 3. The advantages of using a homogeneous concatenation of these data sets include meaningful measures of environment in the UDS, due to its large area (0.88 deg²), and the high-resolution deep imaging in CANDELS (H₁₆₀ > 26.0), affording us robust measures of structural parameters. We construct stellar mass functions for the entire sample as parametrized by the Schechter function, and find that there is a decline in the values of ϕ and of α with …

Metagenome Assembly, Wenjing Wan

Electronic Thesis and Dissertation Repository

The advent of the next generation sequencing technology (NGS) makes it possible to study metagenomics data which is directly extracted and cloned from assemblage of micro-organisms. Metagenomics data are diverse in species and abundance. Because most genome assemblers are designed for single genome assembly, they could not perform well on metagenomics data. To deal with the mixed and not uniformly distributed metagenomics reads, we developed a novel metagenomic assembler named MetaSAGE, on the platform of the existing SAGE assembler. MetaSAGE finds contigs from the overlap graph based on the minimum cost flow theory and uses mate-pair information to extract scaffolds …

Forest Site Productivity: A Review Of Spatial And Temporal Variability In Natural Site Conditions, Jens Peter Skovsgaard, Jerome K. Vanclay

Professor Jerome K Vanclay

Indicators of forest site productivity may exhibit considerable spatial and temporal variability that should be considered in sustainable forest management. It is generally assumed that natural site conditions and, in turn, site productivity changes gradually and predictably. Our review illustrates many exceptions to this paradigm. Consequently, uni-dimensional productivity indicators such as the commonly used site index (estimated based on stand height) is not always sufficient to characterize site productivity for apparently homogeneous forest stands. To alleviate this problem, we suggest a hierarchical procedure for the estimation of forest site productivity including site mapping, unthinned reference stands (against which to measure …

Spatially Explicit Competition In A Mixed Planting Of Araucaria Cunninghamii And Flindersia Brayleyana, Jerome K. Vanclay, David Lamb, Peter D. Erskine, David Cameron

Professor Jerome K Vanclay

Context: A 20-year-old Nelder wheel planted with hoop pine (Araucaria cunninghamii Aiton ex D.Don) and Queensland maple (Flindersia brayleyana F.Muell.) in 18 spokes and 8 rings represents nominal point densities of 3,580, 2,150, 1,140, 595, 305, 158, 82, and 42 stems/ha and offers an opportunity to examine competition and spatial interaction between these two species. Aims: This study aimed to evaluate the intraspecific and interspecific competition between two contrasting tree species and to determine the distance over which competition can be observed. Methods: Competition was estimated using Hegyi’s index, implemented using the Simile visual modeling environment, and calibrated using nonlinear …

Working With High School Students, The Pros And Cons", Luciana Aronne

Cleveland State University Regional Chemistry Teaching Symposium: March 12 & 13, 2015

No abstract provided.

Trials Of The Urban Ecologist, Rebecca W. Dolan, Tim Carter, Travis J. Ryan, Carmen M. Salsbury, Thomas E. Dolan, Marjorie Hennessy

Travis J. Ryan

A group of scientists describe some of the obstacles encountered and insights gained while carrying out ecological research in and around the city of Indianapolis.

U.S. Drought Monitor, February 10, 2015, David Simeral

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for February 10, 2015 (2/10/15) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

Intercomparing Different Devices For The Investigation Of Ice Nucleating Particles Using Snomax® As Test Substance, H. Wex, S. Augustin-Bauditz, Y. Boose, C. Budke, J. Curtius, K. Diehl, A. Dreyer, F. Frank, S. Hartmann, N. Hiranuma, E. Jantsch, Z. A. Kanji, A. Kiselev, T. Koop, O. Möhler, D. Niedermeier, B. Nillius, M. Rösch, D. Rose, C. Schmidt, I. Steinke, F. Stratmann

Michigan Tech Publications

Seven different instruments and measurement methods were used to examine the immersion freezing of bacterial ice nuclei from Snomax® (hereafter Snomax), a product containing ice-active protein complexes from non-viable Pseudomonas syringae bacteria. The experimental conditions were kept as similar as possible for the different measurements. Of the participating instruments, some examined droplets which had been made from suspensions directly, and the others examined droplets activated on previously generated Snomax particles, with particle diameters of mostly a few hundred nanometers and up to a few micrometers in some cases. Data were obtained in the temperature range from -2 to -38 °C, …

Ecological Changes In Two Contrasting Lakes Associated With Human Activity And Dust Transport In Western Wyoming, Janice Brahney, Ashley P. Ballantyne, P. Kociolek, P. R. Leavitt, G. L. Farmer, Jason C. Neff

Watershed Sciences Faculty Publications

The atmospheric transport and deposition of aerosols has the potential to influence the chemistry and biology of oligotrophic alpine lakes. In recent decades, dust and nitrogen emissions to alpine ecosystems have increased across large areas of the western U.S., including Wyoming. Here, we use sediment geochemistry and 87Sr/86Sr and 143Nd/144Nd isotopes to examine historical dust deposition rates to alpine lakes in the southwestern region of the Wind River Range, Wyoming. We evaluate the biological response using diatom fossil assemblages and sediment pigment concentrations. Sediment core analyses indicated that prior to a recent rise in dust flux, phosphorus concentrations and species …

A Simple Method For Tuning The Glass Transition Process In Inorganic Phosphate Glasses, René Fulchiron, Imane Belyamani, Joshua U. Otaigbe, Véronique Bounor-Legaré

Faculty Publications

The physical modification of glass transition temperature (T_g) and properties of materials via blending is a common practice in industry and academia and has a large economic advantage. In this context, simple production of hitherto unattainable new inorganic glass blends from already existing glass compositions via blending raises much hope with the potential to provide new glasses with new and improved properties, that cannot be achieved with classical glass synthesis, for a plethora of applications such as computers screens, glass-to-metal seals, and storage materials for nuclear wastes. Here, we demonstrate that blends of the specific glass compositions …

Csu 4th Annual Regional Chemistry Symposium: March 12 & 13, 2015, Zhihai Li Dr.

Cleveland State University Regional Chemistry Teaching Symposium: March 12 & 13, 2015

CSU 4th Annual Regional Chemistry Symposium: March 12 & 13, 2015

Register here for the 4th Annual Regional Chemistry Symposium March 12 & 13, 2015 Fee: $100 for two days $50 for one day Limited Time special registration fee! The registration fee for the two-day symposium is $100 and includes breakfast, lunch, an outstanding wine and cheese social hour, and discount rates on lodging. A schedule of events will also include a list of Cleveland's best sights, sounds and tastes.

To pay with credit card, visit CSU's ShopNet page at https://campusnet.csuohio.edu/ShopNet/index.jsp

You may also pay the fee in person on …

Assessing Perceived Usability Of The Data Curation Profiles Toolkit Using The Technology Acceptance Model, Tao Zhang, Lisa Zilinski, D Scott Brandt, Jake Carlson

Lisa Zilinski

Presentation slides; The DCPT has been widely adopted and applied in various contexts but its usability as a tool has not been formally assessed. To address this need, we have conducted a survey of users of the DCPT. The survey included quantitative measures of potential influencing factors of using the DCPT and its perceived usability (its usefulness as a tool and its ease of use). Open-ended questions about users’ experiences with the DCPT were also included to better understand the strengths and weaknesses of the tool, as well as areas that could be improved. Factor analysis of the quantitative results …

A Representation Of Selected Nonmanual Signals In American Sign Language, Jerry C. Schnepp

Jerry C Schnepp

Computer-generated three-dimensional animation holds great promise for synthesizing utterances in American Sign Language (ASL) that are not only grammatical, but believable by members of the Deaf community. Animation poses several challenges stemming from the massive amounts of data necessary to specify the movement of three-dimensional geometry, and there is no current system that facilitates the synthesis of nonmanual signals. However, the linguistics of ASL can aid in surmounting the challenge by providing structure and rules for organizing the data. This work presents a first method for representing ASL linguistic and extralinguistic processes that involve the face. Any such representation must …

A Novel Chemosynthetic Peptide With Β-Sheet Motif Efficiently Kills Klebsiella Pnuemoniae In A Mouse Model, Shirui Tan, Changpei Gan, Rongpeng Li, Yan Ye, Shuang Zhang, Xu Wu, Yi Yan Yang, Weimin Fan, Min Wu

Chemistry Faculty Publications

Klebsiella pneumoniae (Kp) is one of the most common pathogens in nosocomial infections and is increasingly becoming multiple drug resistant. However, the molecular pathogenesis of Kp in causing tissue injury and dysregulated host defense remains elusive, further dampening the development of novel therapeutic measures. We have previously screened a series of synthetic antimicrobial beta-sheet forming peptides and identified a peptide (IRIKIRIK; ie, IK8L) with a broad range of bactericidal activity and low cytotoxicity in vitro. Here, employing an animal model, we investigated the antibacterial effects of IK8L in acute infection and demonstrated that peritoneal injection of IK8L to mice down-regulated …

Identifying Locations Of Active Corrosion Growth From Successive In-Line Inspections, Tom Bubenik, William V. Harper, Pam Moreno, Steven Polasik

Mathematics Faculty Scholarship

The integrated approach covered by this paper identifies corrosion activity using a combination of statistics, inspection-signal comparisons, and engineering analyses. The approach relies on an understanding of ILI and the mechanisms that cause corrosion and its growth. Pipeline operators can use the approach to calculate remaining lives, prioritize repairs and mitigation, and extend reassessment intervals. This process is collectively known as statistically-active corrosion.

The Spacetime Co-Torsion In Torsion-Free Biconformal Spaces, James Thomas Wheeler

James Thomas Wheeler

In preceding studies, [TR Gamma minus, TR Gamma plus] we showed that the solution for the connection of flat biconformal space also solves the curved space field equations for the torsion and co-torsion. We continued this investigation with an attempt to solve the full set of torsion and co-torsion field equations, with only the assumption of vanishing torsion and the known form of the metric. We successfully reduced the torsion equations to a single equation. Here, we reduce that equation to its essential degrees of freedom. We find that the spacetime co-torsion is entirely determined by the scale vector and …