Physical Sciences and Mathematics Commons^™

Diels-Alder Chemistry Of Siloles And Their Transformation Into Cyclohex-2-Ene-1,4-Cis-Diols., Andrew C Stevens, Brian L Pagenkopf

Chemistry Publications

The synthesis of siloles with substitution patterns that are continuative toward natural product synthesis are described. Their reactivity in Diels-Alder chemistry was explored through thermal, Lewis acid, and high-pressure reactions. Furthermore, bicyclic adducts were oxidatively cleaved to reveal a highly functionalized cyclohexene core.

G-Sense: A Scalable Architecture For Global Sensing And Monitoring, Alfredo J. Perez, Miguel A. Labrador, Sean J. Barbeau

Computer Science Faculty Publications

The pervasiveness of cellular phones combined with Internet connectivity, GPS embedded chips, location information, and integrated sensors provide an excellent platform to collect data about the individual and its surrounding environment. As a result, new applications have recently appeared to address large-scale societal problems as well as improve the quality of life of the individual. However, these new applications, recently called location-based services, participatory sensing, and human-centric sensing, bring many new challenges, one of them being the management of the huge amount of traffic (data) they generate. This article presents G-Sense, for Global-Sense, an architecture that integrates mobile and static …

Thinking Outside The Curve, Part I: Modeling Birthweight Distribution, Richard Charnigo, Lorie W. Chesnut, Tony Lobianco, Russell S. Kirby

Statistics Faculty Publications

BACKGROUND: Greater epidemiologic understanding of the relationships among fetal-infant mortality and its prognostic factors, including birthweight, could have vast public health implications. A key step toward that understanding is a realistic and tractable framework for analyzing birthweight distributions and fetal-infant mortality. The present paper is the first of a two-part series that introduces such a framework.

METHODS: We propose describing a birthweight distribution via a normal mixture model in which the number of components is determined from the data using a model selection criterion rather than fixed a priori.

RESULTS: We address a number of methodological issues, including how the …

Ribosomal Synthesis Of N-Methylated Peptides, Sara Ahadi

Theses and Dissertations

Natural peptide products isolated from various organisms often contain N-methylated backbones. Such a modification of backbone of the peptide changes its conformational rigidity. This modification improves the biological properties of the peptide, such as improved target affinity, proteolytic stability or membrane permeability. Therefore synthesis of N-methylated peptide libraries is valuable in screening for drug-like peptides suitable for therapeutic uses. Protein synthesis using recombinant elements (PURE) and Flexizyme were used in order to reassign specific codons to N-methyl amino acids. mRNA-dependent translation system enable us to make our desired peptides with N-methyl amino acids. This technology is a convenient tool for …

Deep Ocean Interaction In A Post-Flood Warm Ocean Scenario, Steven M. Gollmer

Science and Mathematics Faculty Presentations

Explanations for the Pleistocene Ice Ages in the context of a recent creation have ranged from denial of the existence of ice ages to a single contracted ice age with multiple surges. This second position mentioned in The Genesis Flood (Whitcomb and Morris, 1961) and modified by Oard (Oard, 1979) relies on a warm ocean in the wake of a global flood. The warm ocean provides a ready source of water vapor, which can be deposited over cold polar land masses as snow. Since a warm ocean prevents land masses from cooling sufficiently to accumulate snow, it is necessary to …

Solvothermal Synthesis, Structure And Optical Property Of Nanosized Cosb3 Skutterudite, Latha Kumari, Wenzhi Li, Jiangyu Huang, Paula P. Provencio

Department of Physics

Binary skutterudite CoSb₃ nanoparticles were synthesized by solvothermal method. The nanostructuring of CoSb₃ material was achieved by the inclusion of various kinds of additives. X-ray diffraction examination indicated the formation of the cubic phase of CoSb₃. Structural analysis by transmission electron microscopy analysis further confirmed the formation of crystalline CoSb₃ nanoparticles with high purity. With the assistance of additives, CoSb₃nanoparticles with size as small as 10 nm were obtained. The effect of the nanostructure of CoSb₃on the UV–visible absorption and luminescence was studied. The nanosized CoSb₃ skutterudite may find application …

The Planet Of The Thinking Animal: Surviving The 21st Century, Tor Hundloe

Tor Hundloe

"Tor Hundloe presents us with two options: change the way we live, or find two more planets to support the world's burgeoning population. With the powerful energy of clever optimism he points the way for this Earth-only option to succeed" (Senator Bob Brown). "We humans are capable of brilliant ideas and inventions, but we have yet to learn the lessons that will prove that we deserve our place on the planet as the thinking animal." (Backcover). The Planet of the Thinking Animal looks to particular countries and groups of countries and examines their economic and environmental policies and activities. It …

Trust Perceptions Of Online Travel Information By Different Content Creators: Some Social And Legal Implications., Stephen Burgess, Carmine Sellitto, Carmen Cox, Jeremy Buultjens

Carmen Cox

Consumers are increasingly turning to the online environment to provide information to assist them in making purchase decisions related to travel products. They often rely on travel recommendations from different sources, such as sellers, independent experts and, increasingly, other consumers. A new type of online content, user-generated content (UGC), provides a number of legal and social challenges to providers and users of that content, especially in relation to areas such as defamation, misrepresentation and social embarrassment. This paper reports research that examined the level of trustworthiness of online travel information from these different sources. The study used a survey of …

First Results From Lattice Simulation Of The Pwmm, Simon Catterall, Greg Van Anders

Physics - All Scholarship

We present results of lattice simulations of the Plane Wave Matrix Model (PWMM). The PWMM is a theory of supersymmetric quantum mechanics that has a well-defined canonical ensemble. We simulate this theory by applying rational hybrid Monte Carlo techniques to a naive lattice action. We examine the strong coupling behaviour of the model focussing on the deconfinement transition.

Cms Tracking Performance Results From Early Lhc Operation, The Cms Collaboration

Physics and Astronomy Publications and Other Works

The first LHC pp collisions at centre-of-mass energies of 0.9 and 2.36 TeV were recorded by the CMS detector in December 2009. The trajectories of charged particles produced in the collisions were reconstructed using the all-silicon Tracker and their momenta were measured in the 3.8 T axial magnetic field. Results from the Tracker commissioning are presented including studies of timing, efficiency, signal-to-noise, resolution, and ionization energy. Reconstructed tracks are used to benchmark the performance in terms of track and vertex resolutions, reconstruction of decays, estimation of ionization energy loss, as well as identification of photon conversions, nuclear interactions, and heavy-flavour …

Synthesis Of Satellite (Modis), Aircraft (Icartt), And Surface (Improve, Epa-Aqs, Aeronet) Aerosol Observations Over Eastern North America To Improve Modis Aerosol Retrievals And Constrain Surface Aerosol Concentrations And Sources, Easan Drury, Daniel J. Jacob, Robert J.D. Spurr, Jun Wang, Yohei Shinozuka, Bruce E. Anderson, A D. Clarke, Jack E. Dibb, Cameron Mcnaughton, Rodney J. Weber

Earth Sciences

We use an ensemble of satellite (MODIS), aircraft, and ground-based aerosol observations during the ICARTT field campaign over eastern North America in summer 2004 to (1) examine the consistency between different aerosol measurements, (2) evaluate a new retrieval of aerosol optical depths (AODs) and inferred surface aerosol concentrations (PM_2.5) from the MODIS satellite instrument, and (3) apply this collective information to improve our understanding of aerosol sources. The GEOS-Chem global chemical transport model (CTM) provides a transfer platform between the different data sets, allowing us to evaluate the consistency between different aerosol parameters observed at different times and …

Foreign Bank Efficiency In Australia: What Makes A Difference?, Jan-Egbert Sturm, Barry Williams

Barry Williams

Purpose – The purpose of this paper is to explore the factors that affect differences in measured efficiency of foreign-owned banks operating in Australia. The relevance of both comparative advantage theory and new trade theory to multinational banking in Australia will be tested.

Design/methodology/approach – A three stage research method is employed. First, estimates of foreign bank efficiency are drawn from a larger sample of domestic and foreign banks in Australia. Efficiency is estimated using parametric distance functions, applying several different specifications of inputs and outputs. Second, factor analysis is used to estimate a series of common factors drawn from …

In Vitro Enabling Technologies For Use In The Aquatic Environment, Colm J. O'Dowd

Doctoral

O’Dowd, C., Mothersill, C.E., Cairns, M.T., Austin, B., Lyng, F.M., McClean, B. and Murphy, J.E.J. Assessing the mitochondrion as a biomarker of fish tissue damage using g radiation as a stress model in vitro.

There is an ever-increasing need for biomarkers to identify toxic stress in the aquatic environment. Such techniques need to be accurate, expeditious, ethical and economical. Typically, in vitro based platforms fit these criteria however many of these systems often undergo ‘assay drift’ and consequently do not fully represent the real-life situation.

In recent years, there has been growing interest in the mitochondrion and its (dys)function …

Evolution Of The Kangmar Dome, Southern Tibet: Structural, Petrologic, And Thermochronologic Constraints, Jeffrey Lee, Bradley Hacker, William Dinklage, Yu Wang, Phillip Gans, Andrew Calvert, Ann Blythe, William Mcclelland

Ann Blythe

Structural, thermobarometric, and thermochronologic investigations of the Kangmar Dome, southern Tibet, suggest that both extensional and contractional deformational histories are preserved within the dome. The dome is cored by an orthogneiss which is mantled by staurolite + kyanite zone metasedimentary rocks; metamorphic grade dies out up section and is defined by a series of concentric kyanite-in, staurolite-in, garnet-in, and chloritoid-in isograds. Three major deformational events, two older penetrative events and a younger doming event, are preserved. The oldest event, D1, resulted in approximately E-W trending tight to isoclinal folds of bedding with an associated moderately to steeply north dipping axial …

Driving Retail Sales Through Effective Supply Chain Management Technology, James Haws

Regis University Student Publications (comprehensive collection)

Supply chain management coordinates the production and distribution of a product with the goal of increasing profitability and productivity. Advancements in technology and workflows in recent years have enabled distributors, suppliers, and retailers to operate more efficiently and effectively. Although significant technological advancements have been made in supply chain management, inventory management still causes a number of problems for retailers. The average out-of -stock rate nationally is approximately at an 8% level (Corsten & Gruen, 2003). Inadequate inventory management can reduce retail sales, drive up costs associated with transportation and storage, decrease customer loyalty, and ultimately lead to a significant …

Thanks To 2d And Maybe Even Beyond: 115 Gev And 140 Gev Almost Standard Model Higgs Without Problems, Marko Popovic

Marko B. Popovic

I address four key points: (1) dynamical, likely local Higgs mass generation (potentially in 2D) as resolution to the 4D hierarchy and vacuum energy problems, (2) possibility that top condensation may be explained by an interplay among the gluon and scalar sectors, (3) the Higgs Mass Zero Crossing (HMZC) scale, most likely equal to the electro-weak symmetry breaking scale, 􀢫􀡱􀢃􀡿􀡮 , in accord with standard cosmology or classic inflation, and (4) two preferred Higgs regions centered at 􀫚􀫚􀫟. 􀫞 􀡳􀢋􀢂and 􀫚􀫝􀫙. 􀫞 􀡳􀢋􀢂 with related high energy models. I show that the Standard Model (SM) in 2D could simultaneously satisfy …

A Comparison Of Gc-Fid And Ptr-Ms Toluene Measurements In Ambient Air Under Conditions Of Enhanced Monoterpene Loading, Jesse L. Ambrose, K. Haase, R. S. Russo, Y. Zhou, M. L. White, E. K. Frinak, C. Jordan, Howard R. Mayne, Robert W. Talbot, B. C. Sive

Chemistry

Toluene was measured using both a gas chromatographic system (GC), with a flame ionization detector (FID), and a proton transfer reaction-mass spectrometer (PTR-MS) at the AIRMAP atmospheric monitoring station Thompson Farm (THF) in rural Durham, NH during the summer of 2004. Simultaneous measurements of monoterpenes, including alpha- and beta-pinene, camphene, Delta(3)-carene, and d-limonene, by GC-FID demonstrated large enhancements in monoterpene mixing ratios relative to toluene, with median and maximum enhancement ratios of similar to 2 and similar to 30, respectively. A detailed comparison between the GC-FID and PTR-MS toluene measurements was conducted to test the specificity of PTR-MS for atmospheric …

Carbonate Control Of H(2) And Ch(4) Production In Serpentinization Systems At Elevated P-Ts, L. Camille Jones, Robert Rosenbauer, Jonas I. Goldsmith, Christopher Oze

Chemistry Faculty Research and Scholarship

Serpentinization of forsteritic olivine results in the inorganic synthesis of molecular hydrogen (H(2)) in ultramafic hydrothermal systems (e. g., mid-ocean ridge and forearc environments). Inorganic carbon in those hydrothermal systems may react with H(2) to produce methane (CH(4)) and other hydrocarbons or react with dissolved metal ions to form carbonate minerals. Here, we report serpentinization experiments at 200 degrees C and 300 bar demonstrating Fe(2+) being incorporated into carbonates more rapidly than Fe(2+) oxidation (and concomitant H(2) formation) leading to diminished yields of H(2) and H(2)-dependent CH(4). In addition, carbonate formation is temporally fast in carbonate oversaturated fluids. Our results …

Measurement Of Hono, Hnco, And Other Inorganic Acids By Negative-Ion Proton-Transfer Chemical-Ionization Mass Spectrometry (Ni-Pt-Cims): Application To Biomass Burning Emissions, J. M. Roberts, P. Veres, C. Warneke, J. A. Neuman, R. A. Washenfelder, S. S. Brown, M. Baasandorj, J. B. Burkholder, I. R. Burling, T. J. Johnson, Robert J. Yokelson, J. De Gouw

Chemistry and Biochemistry Faculty Publications

A negative-ion proton-transfer chemical ionization mass spectrometric technique (NI-PT-CIMS), using acetate as the reagent ion, was applied to the measurement of volatile inorganic acids of atmospheric interest: hydrochloric (HCl), nitrous (HONO), nitric (HNO(3)), and isocyanic (HNCO) acids. Gas phase calibrations through the sampling inlet showed the method to be intrinsically sensitive (6-16 cts/pptv), but prone to inlet effects for HNO(3) and HCl. The ion chemistry was found to be insensitive to water vapor concentrations, in agreement with previous studies of carboxylic acids. The inlet equilibration times for HNCO and HONO were 2 to 4s, allowing for measurement in biomass burning …

Chemical Reasoning Based On An Invariance Property: Bond And Lone Pair Pictures In Quantum Structural Formulas, Joseph D. Alia

Chemistry Publications

Chemists use one set of orbitals when comparing to a structural formula, hybridized AOs or NBOs for example, and another for reasoning in terms of frontier orbitals, MOs usually. Chemical arguments can frequently be made in terms of energy and/or electron density without the consideration of orbitals at all. All orbital representations, orthogonal or not, within a given function space are related by linear transformation. Chemical arguments based on orbitals are really energy or electron density arguments; orbitals are linked to these observables through the use of operators. The Valency Interaction Formula, VIF, offers a system of chemical reasoning based …

Environmental Obfuscation Of A Cyber Physical System - Vehicle Example, Jason Madden, Bruce M. Mcmillin, Anik Sinha

Computer Science Faculty Research & Creative Works

Cyber-Physical Systems (CPSs) are deeply embedded infrastructures that have significant cyber and physical components that interact with each other in complex ways. These interactions can violate a system's security policy, leading to unintended information flow. The physical portion of such systems is inherently observable, and, as such, many methods of preserving confidentiality are not applicable. This fundamental property of CPSs presents new security challenges. To illustrate this, a vehicle composed of an embedded computer system, its operator, and its environment show how information is disclosed to an observer that is watching from the outside. The example is made of up …

Business Sustainability And Undergraduate Management Education In Australia, Josie Fisher, Ingrid Bonn

Ingrid Bonn

There is a large and rapidly expanding academic literature arguing that there is an urgent requirement for businesses to become more sustainable. There is also a demonstrated need for managers to develop a better understanding of sustainability and the appropriate strategies required to improve business sustainability. In addition, there are international calls for educators to address sustainability in their programs. The aim of this study was to investigate the extent to which business sustainability is being incorporated into undergraduate business and management courses in Australian universities. The high percentage of international students enrolled in these courses suggests our findings have …

A Review Of Procedures To Evolve Quantum Algorithms, Adrian Gepp, Phil Stocks

Adrian Gepp

There exist quantum algorithms that are more efficient than their classical counterparts; such algorithms were invented by Shor in 1994 and then Grover in 1996. A lack of invention since Grover’s algorithm has been commonly attributed to the non-intuitive nature of quantum algorithms to the classically trained person. Thus, the idea of using computers to automatically generate quantum algorithms based on an evolutionary model emerged. A limitation of this approach is that quantum computers do not yet exist and quantum simulation on a classical machine has an exponential order overhead. Nevertheless, early research into evolving quantum algorithms has shown promise. …

Business Failure Prediction Using Survival Analysis, Kuldeep Kumar, Adrian Gepp

Adrian Gepp

Accurate business failure prediction models would be extremely valuable to many industry sectors, particularly in financial investment and lending. Recently, there has been a significant increase in interest in business failure prediction, from both industry and academia. Statistical business failure prediction models attempt to predict the failure or success of a business. Discriminant and logit analyses have been the most popular approaches, but there are also a large number of alternative techniques available. In this paper, a comparatively new technique known as survival analysis has been used for business failure prediction. Overall, the results suggest that survival analysis techniques provide …

Calibration Of The Ligo Gravitational Wave Detectors In The Fifth Science Run, Duncan Brown, J. Abadie

Physics - All Scholarship

The Laser Interferometer Gravitational Wave Observatory (LIGO) is a network of three detectors built to detect local perturbations in the space-time metric from astrophysical sources. These detectors, two in Hanford, WA and one in Livingston, LA, are power-recycled Fabry-Perot Michelson interferometers. In their fifth science run (S5), between November 2005 and October 2007, these detectors accumulated one year of triple coincident data while operating at their designed sensitivity. In this paper, we describe the calibration of the instruments in the S5 data set, including measurement techniques and uncertainty estimation.

First-Principles Study Of The Variation Of Electron Transport In A Single Molecular Junction With The Length Of The Molecular Wire, Partha Pratim, Ranjit Pati

Department of Physics Publications

We report a first-principles study of quantum transport in a prototype two-terminal device consisting of a molecular nanowire acting as an inter-connect between two gold electrodes. The wire is composed of a series of bicyclo[1.1.1]pentane (BCP) cage-units. The length of the wire (L) is increased by sequentially increasing the number of BCP cage units in the wire from 1 to 3. A two terminal model device is made out of each of the three wires. A parameter free, nonequilibrium Green’s function approach, in which the bias effect is explicitly included within a many body framework, is used to …

Three-Dimensional Mechanics Of Yakutat Convergence In The Southern Alaskan Plate Corner, Peter O. Koons, B. P. Hooks, T. Pavlis, P. Upton, A. D. Barker

Earth Science Faculty Scholarship

Three-dimensional numerical models are used to investigate the mechanical evolution of the southern Alaskan plate corner where the Yakutat and the Pacific plates converge on the North American plate. The evolving model plate boundary consists of Convergent, Lateral, and Subduction subboundaries with flow separation of incoming material into upward or downward trajectories forming dual, nonlinear advective thermal/mechanical anomalies that fix the position of major subaerial mountain belts. The model convergent subboundary evolves into two teleconnected orogens: Inlet and Outlet orogens form at locations that correspond with the St. Elias and the Central Alaska Range, respectively, linked to the East by …

Prism: The Development Of An Online Repository For Information Security Education Resources, Vincent Garramone

Regis University Student Publications (comprehensive collection)

The goal of this study was to develop, implement and evaluate an online system that would allow intuitive sharing and retrieval of information security (IS) education materials, and a corresponding taxonomic system relevant to common contexts in which IS concepts are taught. After determining initial requirements, popular open-source content management systems were evaluated. The most suitable solution was customized, and implemented as the Public Repository for Information Security Material (PRISM) website. An initial organizational taxonomy was developed, and the repository was populated with resources from several sources. Evaluations of PRISM suggest that core functionalities have been suitably designed and implemented, …

Discovery Of Very High Energy Gamma-Ray Emission From The Snr G54.1+0.3, P. T. Reynolds, Et Al

Physical Sciences Publications

We report the discovery of very high energy (VHE) gamma-ray emission from the direction of the SNR G54.1+0.3 using the VERITAS ground-based gamma-ray observatory. The TeV signal has an overall significance of 6.8σ and appears pointlike given the resolution of the instrument. The integral flux above 1 TeV is 2.5% of the Crab Nebula flux and significant emission is measured between 250 GeV and 4 TeV, well described by a power-law energy spectrum dN/dE ~ E –Γ with a photon index Γ = 2.39 ± 0.23stat ± 0.30sys. We find no evidence of time variability among observations …

The First Vlbi Image Of The Young, Oxygen-Rich Supernova Remnant In Ngc 4449, M. F. Bietenholz, N. Bartel, D. Milisavljevic, R. A. Fesen

Dartmouth Scholarship

We report on sensitive 1.4-GHz VLBI radio observations of the unusually luminous supernova remnant SNR 4449-1 in the galaxy NGC 4449, which gave us the first well-resolved image of this object. The remnant's radio morphology consists of two approximately parallel bright ridges, suggesting similarities to the barrel shape seen for many older Galactic supernova remnants or possibly to SN 1987A. The angular extent of the remnant is 65 × 40 mas, corresponding to (3.7 × 2.3) × 10¹⁸ (D/3.8 Mpc) cm. We also present a new, high signal-to-noise ratio optical spectrum. By comparing the remnant's linear size …