Physical Sciences and Mathematics Commons^™

Upper Cretaceous Peay Bentonites (North-Central Wyoming): Provenance And Tectonics Interpretation From Ash Composition, Nazrul I. Khandaker, Carl F. Vondra, Karl E. Seifert, Malek Shami, Rochelle Cardinale, Thakur Chaturgan

Publications and Research

The Peay bentonites belong to the basal Frontier Formation (Bighorn Basin, north-central Wyoming), primarily outcrop in the Bighorn Basin, rest on an extensively bioturbated sandstone unit, the Peay Sandstone, and are generally the thinner bentonitic unit. Beds of very light gray to greenish gray bentonite are also abundant in the lower Frontier units between Kaycee and Mayoworth (Powder River Basin) and are very rarely as much as 3 m thick. Bentonite occurs within the interstratified shale, sandstone, and siltstone sequences of the lower Frontier unit throughout much of the southwestern Powder River Basin. The purpose of this study is to …

Gains In Power From Structured Two-Sample Tests Of Means On Graphs, Laurent Jacob, Pierre Neuvial, Sandrine Dudoit

U.C. Berkeley Division of Biostatistics Working Paper Series

We consider multivariate two-sample tests of means, where the location shift between the two populations is expected to be related to a known graph structure. An important application of such tests is the detection of differentially expressed genes between two patient populations, as shifts in expression levels are expected to be coherent with the structure of graphs reflecting gene properties such as biological process, molecular function, regulation, or metabolism. For a fixed graph of interest, we demonstrate that accounting for graph structure can yield more powerful tests under the assumption of smooth distribution shift on the graph. We also investigate …

A Critical Analysis Of Payload Anomaly-Based Intrusion Detection Systems, Anthony F. Mercurio

Regis University Student Publications (comprehensive collection)

Examining payload content is an important aspect of network security, particularly in today's volatile computing environment. An Intrusion Detection System (IDS) that simply analyzes packet header information cannot adequately secure a network from malicious attacks. The alternative is to perform deep-packet analysis using n-gram language parsing and neural network technology. Self Organizing Map (SOM), PAYL over Self-Organizing Maps for Intrusion Detection (POSEIDON), Anomalous Payload-based Network Intrusion Detection (PAYL), and Anagram are next-generation unsupervised payload anomaly-based IDSs. This study examines the efficacy of each system using the design-science research methodology. A collection of quantitative data and qualitative features exposes their strengths …

An Attempt To Get And Keep Women Involved In Physics, Jim Crumley, Kristen Nairn, Lynn Ziegler

MapCores Faculty Publications

In this talk I will briefly review some of the obstacles to the full participation of women in the STEM disciplines. In order to increase the number of women in physics, computer science, and mathematics we have started a cohort-based program with curricular and scholarship components for women in these majors. I will present the results of our program so far and offer some advice based on our experiences.

2010 Warbonnet Ranch Botanical Survey, Robert F. Steinauer

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The Nebraska Natural Legacy Project (Schneider et al, 2005), a statewide comprehensive wildlife conservation strategy developed by the Nebraska Game and Parks Commission (NGPC), identified the Pine Ridge and Oglala Grasslands of northwestern Nebraska as “Biologically Unique Landscapes” (BULs). Native plant community and rare plant surveys were conducted on the approximately 8,000-acre privately-owned Warbonnet Ranch. The Ranch occurs within both of the above mentioned BULs and is topographically and geologically diverse. The primary goal of this survey was to document the botanical resources of a well-managed, privately-owned, western Nebraska range and determine its potential for conservation of Nebraska’s biological diversity. …

Twisted Lattice Supersymmetry And Applications To Ads/Cft, Simon Catterall

Physics - All Scholarship

Review recent approaches to constructing supersymmetric lattice theories focusing in particular on the concept of topological twisting. The latter technique is shown to expose a nilpotent, scalar supersymmetry which can be implemented exactly in the lattice theory. Using these ideas a lattice action for \cN=4 super Yang-Mills in four dimensions can be written down which is gauge invariant, free of fermion doublers and respects one out of a total of 16 continuum supersymmetries. It is shown how these exact symmetries together with the large point group symmetry of the lattice strongly constrain the possible counterterms needed to renormalize the theory …

Entanglement-Assisted Quantum Low-Density Parity-Check Codes, Yuichiro Fujiwara, David C. Clark, Peter Vandendriessche, Maarten De Boeck, Vladimir Tonchev

Department of Mathematical Sciences Publications

This article develops a general method for constructing entanglement-assisted quantum low-density parity-check (LDPC) codes, which is based on combinatorial design theory. Explicit constructions are given for entanglement-assisted quantum error-correcting codes with many desirable properties. These properties include the requirement of only one initial entanglement bit, high error-correction performance, high rates, and low decoding complexity. The proposed method produces several infinite families of codes with a wide variety of parameters and entanglement requirements. Our framework encompasses the previously known entanglement-assisted quantum LDPC codes having the best error-correction performance and many other codes with better block error rates in simulations over the …

Three-Dimensional Stereoscopic Exploration System For The Heart, Thomas Wischgoll

Computer Science and Engineering Faculty Publications

No abstract provided.

Allocating Homeland Security Screening Resources Using Knapsack Problem Models, Rebecca Dreiding

Theses and Dissertations

Since the events of September 11, 2001, the federal government is focused on homeland security and the fight against terrorism. This thesis addresses the idea of terrorist groups smuggling nuclear weapons through the borders of the United States. Security screening decisions are analyzed within maritime and aviation domains using discrete optimization models, specifically knapsack problems. The focus of the maritime chapters involves a risk-based approach for prescreening intelligence classifications for primary and secondary screening decisions given limited budget and resources. Results reveal that screening decisions are dependent on prescreening classification and the efficacy of the screening technologies. The screening decisions …

Model Selection With Information Criteria, Changjiang Xu

Electronic Thesis and Dissertation Repository

This thesis is on model selection using information criteria. The information criteria include generalized information criterion and a family of Bayesian information criteria. The properties and improvement of the information criteria are investigated.

We analyze nonasymptotic and asymptotic properties of the information criteria for linear models, probabilistic models, and high dimensional models, respectively. We give probability of selecting a model and compute the probability by Monte Carlo methods. We derive the conditions under which the criteria are consistent, underfitting, or overfitting.

We further propose new model selection procedures to improve the information criteria. The procedures combine the information criteria with …

Stereotype Logit Models For High Dimensional Data, Andre Williams

Theses and Dissertations

Gene expression studies are of growing importance in the field of medicine. In fact, subtypes within the same disease have been shown to have differing gene expression profiles (Golub et al., 1999). Often, researchers are interested in differentiating a disease by a categorical classification indicative of disease progression. For example, it may be of interest to identify genes that are associated with progression and to accurately predict the state of progression using gene expression data. One challenge when modeling microarray gene expression data is that there are more genes (variables) than there are observations. In addition, the genes usually demonstrate …

Characterizing And Diagnosing Architectural Degeneration Of Software Systems From Defect Perspective, Zude Li

Electronic Thesis and Dissertation Repository

The architecture of a software system is known to degrade as the system evolves over time due to change upon change, a phenomenon that is termed architectural degeneration. Previous research has focused largely on structural "deviations" of an architecture from its baseline. However, another angle to observe architectural degeneration is software defects, especially those that are architecturally related. Such an angle has not been scientifically explored until now. Here, we ask two relevant questions: (1) What do defects indicate about architectural degeneration? and (2) How can architectural degeneration be diagnosed from the defect perspective? To answer question (1), we conducted …

Surface Modifications Of Poly(Dimethylsiloxane) For Biological Application Of Microfluidic Devices, Jessica M. Dechene

Electronic Thesis and Dissertation Repository

The spatial control of cellular adhesion is fundamental to the development of studies of cell interaction, cellular microarrays, and cell based biosensors. The ability to pattern cell adhesion on flat substrates and in microfluidic channels is important for locating cell near microdetectors in cell based biosensor devices. Cell adhesion can be controlled by patterning a material's wettability, as cells are able to adhere to hydrophilic surface and will generally avoid hydrophobic materials.

This thesis focuses on patterning the surface wettability of poly(dimethylsilox-ane) (PDMS) in order to spatially control cell adhesion. The polymer is selectively modifed by the deposition of aluminum …

Determination Of The Axial-Vector Weak Coupling Constant With Ultracold Neutrons., J. Liu, Michael P. Mendenhall, Anthony T. Holley, Henning O. Back, Thomas J. Bowles, Leah J. Broussard, Richard Carr, Stephen Clayton, Scott Currie, Bradley W. Filippone, A. Garcı́A, Peter Geltenbort, Kevin P. Hickerson, J. Todd Hoagland, Gary E. Hogan, B. Hona, Takeyasu M. Ito, Chenyu Liu, Mark Makela, Russell R. Mammei, J.W. Martin, Daneil Melconian, Charles L. Morris, Robert W. Pattie, A. Pérez Galván, Margaret L. Pitt, Bradley Plaster, John C. Ramsey, R. Rios, R. Russell, Andy Saunders, Susan J. Seestrom, Walter E. Sondheim, E. Tatar, Robert B. Vogelaar, Brittany Vorndick, Christopher Wrede, H. Yan, Albert R. Young

Robert W. Pattie Jr.

Mcrg Minimal Walking Technicolor, Simon Catterall, Luigi Del Debbio, Joel Giedt, Liam Keegan

Physics - All Scholarship

We present a Monte Carlo renormalisation group study of the SU(2) gauge theory with two Dirac fermions in the adjoint representation. Using the two lattice matching technique recently advocated and exploited in [arXiv:0907.0919], we measure the running of the coupling and the anomalous mass dimension.

Endothelial Cell Capture Of Heparin-Binding Growth Factors Under Flow, Bing Zhao, Changjiang Zhang, Kimberly Forsten-Williams, Jun Zhang, Michael Fannon

Ophthalmology and Visual Science Faculty Publications

Circulation is an important delivery method for both natural and synthetic molecules, but microenvironment interactions, regulated by endothelial cells and critical to the molecule's fate, are difficult to interpret using traditional approaches. In this work, we analyzed and predicted growth factor capture under flow using computer modeling and a three-dimensional experimental approach that includes pertinent circulation characteristics such as pulsatile flow, competing binding interactions, and limited bioavailability. An understanding of the controlling features of this process was desired. The experimental module consisted of a bioreactor with synthetic endothelial-lined hollow fibers under flow. The physical design of the system was incorporated …

Leveraging Information Technology Within A Roman Catholic Diocese, Sidney K. Rodriguez

Regis University Student Publications (comprehensive collection)

Parishes within the Roman Catholic Church face many of the same concerns as any other non-profit organization. Dependencies on donations and volunteer help restrict the parish to leverage technology to gain efficiencies. Parishes have an additional concern. Although grouped under a Diocese, this hierarchical structure is not a standard, top-down directive organization. A Roman Catholic Diocese is a "subsidiarity". Decisions are made at the lowest level, specifically; decisions on how to operate and administer the parish are given to the pastor or parish director of that parish. Acknowledging that leveraging technology is a way to gain efficiencies, the ability to …

Identification And Optimization Of Classifier Genes From Multi-Class Earthworm Microarray Dataset, Ying Li, Nan Wang, Chaoyang Zhang, Ping Gong

Faculty Publications

Monitoring, assessment and prediction of environmental risks that chemicals pose demand rapid and accurate diagnostic assays. A variety of toxicological effects have been associated with explosive compounds TNT and RDX. One important goal of microarray experiments is to discover novel biomarkers for toxicity evaluation. We have developed an earthworm microarray containing 15,208 unique oligo probes and have used it to profile gene expression in 248 earthworms exposed to TNT, RDX or neither. We assembled a new machine learning pipeline consisting of several well-established feature filtering/selection and classification techniques to analyze the 248-array dataset in order to construct classifier models that …

Tensorial Reconstruction At The Integrand Level, G. Heinrich, Giovanni Ossola, T. Reiter, F. Tramontano

Publications and Research

We present a new approach to the reduction of one-loop amplitudes obtained by reconstructing the tensorial expression of the scattering amplitudes. The reconstruction is performed at the integrand level by means of a sampling in the integration momentum. There are several interesting applications of this novel method within existing techniques for the reduction of one-loop multi-leg amplitudes: to deal with numerically unstable points, such as in the vicinity of a vanishing Gram determinant; to allow for a sampling of the numerator function based on real values of the integration momentum; to optimize the numerical reduction in the case of long …

Packing Virtual Machines Onto Servers, David Luke Wilcox

Theses and Dissertations

Data centers consume a significant amount of energy. This problem is aggravated by the fact that most servers and desktops are underutilized when powered on, and still consume a majority of the energy of a fully utilized computer even when idle This problem would be much worse were it not for the growing use of virtual machines. Virtual machines allow system administrators to more fully utilize hardware capabilities by putting more than one virtual system on the same physical server. Many times, virtual machines are placed onto physical servers inefficiently. To address this inefficiency, I developed a new family of …

3d Heliospheric Simulations Of Heavy Neutral Particles From The Interstellar Medium, Akito Kawamura

Von Braun Symposium Student Posters

No abstract provided.

Changing Precipitation And Land Cover Increasing Sedimentation In The Panama Canal Watershed, Tiffany Keeton, Cory Manberg, Josh Myrick

Von Braun Symposium Student Posters

No abstract provided.

Candle In The Wind: Probing The Solar Wind Structure Using Interplanetary Scintillation Data, Tae K. Kim

Von Braun Symposium Student Posters

No abstract provided.

Comparison Of Mm5 And Wrf Forecast Models, Cmorph And Hydro Estimator Satellite Estimates To Ground-Based Rain Gauge Data, Melanie Phillips, Nicole Dsouza

Von Braun Symposium Student Posters

No abstract provided.

Developing The Hydrological Problématique Of Taboga Island, Amanda Bosserman, Jason Pounders

Von Braun Symposium Student Posters

No abstract provided.

Digitally Optimizing "Smart" Photovoltaics, Nicholas M. Christensen

Von Braun Symposium Student Posters

No abstract provided.

Investigation Of Land Cover Change Within The Panama Canal Watershed Through The Interpretation Of Aerial Photographs, Casey Calamaio, Zachary Langford

Von Braun Symposium Student Posters

No abstract provided.

Studying Gravitational Lensing Effect Using Grb From Fermi Mission, Roderick Davidson

Von Braun Symposium Student Posters

No abstract provided.

The Emberá And Their Resources: Vulnerability Of Natural Resources To Climate Change, Nancy Lee Pospelov, Claire Herdy

Von Braun Symposium Student Posters

No abstract provided.

Simulations Of Energetic Neutral Hydrogen: Creation, Transport & Loss, Eric Zirnstein

Von Braun Symposium Student Posters

No abstract provided.