Physical Sciences and Mathematics Commons^™

Quantitative Assessment Of Climate-Induced Glacier Fluctuation In The Central Himalaya Utilizing Satellite Images., Umesh Haritashya

Umesh Haritashya

Sustainability, Energy, and Environment Seed Grant. Total Amount $10,000. Role: PI. Project duration: January 1, 2009 – December 31, 2009.

Visualdsolve: Visualizing Differential Equations With Mathematica, Second Edition, Stan Wagon, Antonin Slavik, Dan Schwalbe

Stan Wagon, Retired

No abstract provided.

Introduction To Life Data Analysis, Caroline Lubert, C. Lange

Caroline P Lubert

No abstract provided.

A Bayesian Approach To Ordinal Outcomes For Neurosurgical Clinical Research., Sally Wood

Sally Wood

The objective of this study is to demonstrate a Bayesian approach for the statistical analysis of neurosurgical data where the investigators have used an ordinal scale for the outcome. A Bayesian approach that uses data augmentation and Gibbs sampling to perform ordinal probit regression is demonstrated in a neurosurgical context. The statistical approach is applied to a regression analysis to examine the relationship between female gender and the outcome of severe traumatic brain injury measured with the Glascow Outcome Scale. The approach is applied to a hierarchical meta-analysis to examine the relationship between age and the outcome from subarachnoid haemorrhage …

Elliptical Orbit Node Passage Time, Eric Addison

Eric Addison

The node passage time is calculated in order to gain an understanding of the kind of velocities and time scales will be involved in BEMRI simulations during close encounters with the SMBH. The result is generalized to produce a function of time with respect to theta, t(θ).

Quantitative Paleobiogeography Unraveling Macroevolutionary Patterns In Fossil Plankton Using Geographic Information Systems (Gis) Software And The New Geobiodiversity Database, Daniel Goldman

Daniel Goldman

Funding agency: UDRI Seed Grant Amount: $7,500.00

Trans-Dimensional Metropolis-Hastings Using Parallel Chains, Sally Wood, James Pullen, Robert Kohn, David Leslie

Sally Wood

A general Bayesian sampling method is developed that uses parallel chains to select between models and to average the predictive density over such models. The method applies to both non-nested models and to nested models, and is particularly useful for mixtures of complex component models, where a novel approach to overcome the label-switching problem is used. The method is illustrated with real and simulated data in model-averaging over alternative financial time series models, mixtures of normal distributions, and mixtures of smoothing spline models.

Detecting Denial Of Service Attacks In Tor, Norman Danner, Danny Krizanc, Marc Liberatore

Norman Danner

Tor is currently one of the more popular systems for anonymizing near real-time communications on the Internet. Recently, Borisov et al. proposed a denial of service based attack on Tor (and related systems) that significantly increases the probability of compromising the anonymity provided. In this paper, we propose an algorithm for detecting such attacks and examine the effectiveness of the obvious approach to evading such detection. We implement a simplified version of the detection algorithm and study whether the attack may be in progress on the current Tor network. Our preliminary measurements indicate that the attack was probably not implemented …

Geometric Ergodicity Of Gibbs Samplers (University Of Minnesota), Alicia Johnson

Alicia A. Johnson

No abstract provided.

Modeling The Status And Threats To The Philippine Eagle In The Eastern Mindanao Biodiversity Corridor, Vicente Calag, Sean Fitzgerald, James Hafner, Jayson Ibanez, Alicia Johnson, Don Sluter

James A Hafner

The Philippines is among the most endemic-rich areas for all global biodiversity hotspots. Conserving that biodiversity presents multi-scaled challenges including the critical need for habitat and species level documentation as a basis for identifying conservation targets. This paper contributes to that need by describing the use of A Composite Bio-geographic Analysis (CBA) model to model the dynamics and inter-relationships between species distribution, nest, habitat and land use change, population distribution and access to the PA and to synthesize and evaluate data on the status and threats to the Philippine Eagle Pithecophaga jefferyi in the Mt. Hamiguitan Protected Area, one of …

Brain Activation For Reading And Listening Comprehension: An Fmri Study Of Modality Effects And Individual Differences In Language Comprehension., Augusto Buchweitz, Robert Mason, Tomitch Leda, Marcel Just

Marcel Adam Just

No abstract provided.

Altering Cortical Connectivity: Remediation-Induced Changes In The White Matter Of Poor Readers, Timothy Keller, Marcel Just

Marcel Adam Just

No abstract provided.

Soliton Perturbation Theory For A Higher-Order Hirota Equation, Tim Marchant

Tim Marchant

Solitary wave evolution for a higher order Hirota equation is examined. For the higher order Hirota equation resonance between the solitary waves and linear radiation causes radiation loss. Soliton perturbation theory is used to determine the details of the evolving wave and its tail. An analytical expression for the solitary wave tail is derived and compared to numerical solutions. An excellent comparison between numerical and theoretical solutions is obtained for both right- and left-moving waves. Also, a two-parameter family of higher order asymptotic embedded solitons is identified.

Polymorphic Ros Scavenging Revealed By Cccp In A Lizard, Mats Olsson, Mark Wilson, Caroline Isaksson, Tobias Uller

Mark R Wilson

Ingestion of antioxidants has been argued to scavenge circulating reactive molecules (e.g., free radicals), play a part in mate choice (by mediating access to this important resource), and perhaps increase life span. However, recent work has come to question these relationships. We have shown elsewhere in the polychromatic lizard, Ctenophorus pictus, that diet supplementation of carotenoids as antioxidants does not depress circulating natural reactive oxygen species (ROS) levels and leads to no corresponding improvement of color traits. However, a much stronger test would be to experimentally manipulate the ROS levels themselves and assess carotenoid-induced ROS depression. Here, we achieve this …

Photochromic 3-Dimensional Actuator Based On An Uncrosslinked Liquid Crystal Elastomer, Hyong Choi, Kwang-Un Jeong, Liang-Chy Chien, Myong-Hoon Lee

Liang-Chy Chien

A chemically programmed photochromic liquid crystal (LC) polymer was newly synthesized and used to fabricate an actuator exhibiting reversible photo-activated bending behavior at ambient temperature. Due to the lack of chemical crosslinking in this photochromic LC elastomer, it was possible to fabricate an actuator in the form of fiber or film by melt or solution processing, respectively. The three-dimensional (3D) bending of the film actuator can be precisely controlled in various directions by polarized ultraviolet (UV) light. The novel photochromic LC elastomer, exhibiting reversible photomechanical bending with controlled directions at room temperature, is beneficial for the realization of wireless remote-controlled …

Modulation Analysis Of Boundary Induced Motion Of Optical Solitary Waves In A Nematic Liquid Crystal, Tim Marchant

Tim Marchant

We consider the motion of a solitary wave, a nematicon, in a finite cell filled with a nematic liquid crystal. A modulation theory is developed to describe the boundary-induced bouncing of a nematicon in a one-dimensional cell and it is found to give predictions in very good agreement with numerical solutions. The boundary-induced motion is then considered numerically for a two-dimensional cell and a simple extension of the modulation theory from one to two space dimensions is then made, with good agreement being found with numerical solutions for the nematicon trajectory. The role of nematicon shape and relative position to …

The Effect Of Catalyst Of The Reaction Of P-Hydroxybenzaldehyde With Acetic Anhydride: A Discovery-Oriented Green Laboratory Experiment, Ram Mohan, Matthew Huddle, Michael Devore

Ram S. Mohan

No abstract provided.

Using A Personal Response System, John Hawkins, Bruce Mclean

John B. Hawkins

Over the years, we have consistently used the latest technology in our classes. It has made us more organized and has increased the understanding of our students. Now we have combined our old presentations and drawings from the past and placed them in PowerPoint presentations with imbedded questions. These questions can be multiple choice or questions that have numerical answers. Our University has settled upon one company to provide a personal response system, eInstruction’s Classroom Performance System (CPS). The students answer each question as it appears and we are able to evaluate our lectures in real time. Applets can still …

A Simple Sn2 Reaction For The Undergraduate Organic Laboratory, John Esteb

John Esteb

A simple procedure for the synthesis of n-butyl naphthyl ether is presented. This procedure represents an easy method for the production of an aryl ether by an SN2 reaction, uses ethanol as an environmentally friendly solvent, and does not require the use of a lachrymator. Product isolation is done by pouring the reaction mixture over ice and collecting the solid by suction filtration. Students typically recover from 7–95% of the ether.

Note: Link is to the article in a subscription database available to users affiliated with Butler University. Appropriate login information will be required for access. Users not affiliated with …

Progress Toward Sustainability: A Report Card And A Recommended Agenda, John Dernbach

John C. Dernbach

No abstract provided.

Mixture Of Random Effects For Individual Learning Curves, Sally Wood, Edward Cripps, Robert Wood

Sally Wood

In the pyschology literature individuals are often classified as entity theorists or incrementalists. In this paper we explore the different learning behaviours over time of these two groups. To assess learning an individual is assigned a task and their performance on the task is measured over a number of trials. Learning behaviour is modelled as a mixture of two random effects, where the random effects components of the mixture correspond to increased learning and spiralling behaviour. We find significant differences in the learning behaviours of the two groups. Specifically those individuals who are categorized as entity theorists are more likely …

The Mysterious Disappearance Of Ettore Majorana - Art. No. 012019, Br Holstein

Barry R Holstein

We review the short but interesting life of Ettore Majorana.

A Flexible Solvolysis Experiment For The Undergraduate Organic Laboratory, John Esteb, John Magers, Luanne Mcnulty, Paul Morgan, Kathryn Tindell, Anne Wilson

John Esteb

A simple SN1 reaction is presented that uses bromotriphenylmethane and a range of oxygen-based nucleophiles including water and various alcohols. This procedure represents a process that affords easy isolation of solid products. Typical student yields ranged from 17–128% with the average yield of 50%. Students obtained products with a melting point range of 140 to 164 °C. This procedure offers multiple ways to adapt this experiment from a straight solvolysis reaction to a discovery-based experiment that explores the effect of nucleophile (for a more advanced group) or the method of product isolation. Note: Link is to the article in a …

Wine Purchase Decisions And Consumption Behaviors: Insights From A Probability Sample Drawn In Auckland, New Zealand, Peter Danaher

Peter Danaher

No abstract provided.

Building A Global Culture Of Software Quality, Robert Yacobellis

Robert H Yacobellis

No abstract provided.

A Sensitivity Matrix Methodology For Inverse Problem Formulation, Alex Calpaldi

Alex Capaldi

We propose an algorithm to select parameter subset combinations that can be estimated using an ordinary least-squares (OLS) inverse problem formulation with a given data set. First, the algorithm selects the parameter combinations that correspond to sensitivity matrices with full rank. Second, the algorithm involves uncertainty quantification by using the inverse of the Fisher Information Matrix. Nominal values of parameters are used to construct synthetic data sets, and explore the effects of removing certain parameters from those to be estimated using OLS procedures. We quantify these effects in a score for a vector parameter defined using the norm of the …

How Often Versus How Long: The Interplay Of Contact Frequency And Relationship Duration In Customer Perceptions Of Service Relationship Strength, Peter Danaher, Tracey Dagger, Brian Gibbs

Peter Danaher

This study investigates the effects of customer contact frequency and relationship duration on customer-reported relationship strength (CRRS). Although relationships are understood to develop through an incremental process of time and encounters, exactly how frequency and duration interactively influence CRRS is not known. We embed our analysis of these two relationship-quantity variables within a larger model that considers the effects of relationship-quality variables—commitment, trust and satisfaction—on CRRS. We additionally control for customer demographics and service type. Using a fully national sample of 591 service consumers, we find that both contact frequency and relationship duration have a positive effect on CRRS, and …

Variation In Levels Of Reactive Oxygen Species Is Explained By Maternal Identity, Sex And Body-Size-Corrected Clutch Size In A Lizard, Mark Wilson, Mats Olsson, Tobias Uller, Caroline Isaksson, Beth Mott

Mark R Wilson

No abstract provided.

A Perturbation Drbem Model For Weakly Nonlinear Wave Run-Ups Around Islands, Tim Marchant

Tim Marchant

In this paper, the dual reciprocity boundary element method (DRBEM) based on the perturbation method is presented for calculating run-ups of weakly nonlinear long waves scattered by islands. Under the assumption that the incident waves are harmonic, the time-dependent nonlinear Boussinesq equations are transformed into three time-independent linear equations by using the perturbation method, where, besides nonlinearity ε, the dispersion μ2 is also included in the perturbed expansion. The first-order solution η0 is found by using the linear long-wave equations. Then η0 is used in two second-order governing equations related to the dispersion and nonlinearity, respectively. Since no any omission …

Motorola's Approach To Software Dfss, Robert Yacobellis

Robert H Yacobellis

No abstract provided.