Physical Sciences and Mathematics Commons^™

The Minimum Rank, Inverse Inertia, And Inverse Eigenvalue Problems For Graphs, Mark Condie Kempton

Theses and Dissertations

For a graph G we define S(G) to be the set of all real symmetric n by n matrices whose off-diagonal zero/nonzero pattern is described by G. We show how to compute the minimum rank of all matrices in S(G) for a class of graphs called outerplanar graphs. In addition, we obtain results on the possible eigenvalues and possible inertias of matrices in S(G) for certain classes of graph G. We also obtain results concerning the relationship between two graph parameters, the zero forcing number and the path cover number, related to the minimum rank problem.

Van Der Waals-London Dispersion Interaction Framework For Experimentally Realistic Carbon Nanotube Systems, Roger H. French

Faculty Scholarship

A system's van der Waals–London dispersion interactions are often ignored, poorly understood, or crudely approximated, despite their importance in determining the intrinsic properties and intermolecular forces present in a given system. There are several key barriers that contribute to this issue: 1) lack of the required full spectral optical properties, 2) lack of the proper geometrical formulation to give meaningful results, and 3) a perception that a full van der Waals–London dispersion calculation is somehow unwieldy or difficult to understand conceptually. However, the physical origin of the fundamental interactions for carbon nanotube systems can now be readily understood due to …

Long Range Interactions In Nanoscale Science, Roger H. French

Faculty Scholarship

Our understanding of the “long range” electrodynamic, electrostatic, and polar interactions that dominate the organization of small objects at separations beyond an interatomic bond length is reviewed. From this basic-forces perspective, a large number of systems are described from which one can learn about these organizing forces and how to modulate them. The many practical systems that harness these nanoscale forces are then surveyed. The survey reveals not only the promise of new devices and materials, but also the possibility of designing them more effectively.

Flexible Kernel Memory, Dimitri Nowicki, Hava Siegelmann

Hava Siegelmann

This paper introduces a new model of associative memory, capable of both binary and continuous-valued inputs. Based on kernel theory, the memory model is on one hand a generalization of Radial Basis Function networks and, on the other, is in feature space, analogous to a Hopfield network. Attractors can be added, deleted, and updated on-line simply, without harming existing memories, and the number of attractors is independent of input dimension. Input vectors do not have to adhere to a fixed or bounded dimensionality; they can increase and decrease it without relearning previous memories. A memory consolidation process enables the network …

The Lick Agn Monitoring Project: The M Bh-Σ* Relation For Reverberation-Mapped Active Galaxies, Jong-Hak Woo, Tommaso Treu, Aaron J. Barth, Shelley A. Wright, Jonelle L. Walsh, Misty C. Bentz, Paul Martini, Vardha N. Bennert, Gabriela Canalizo, Alexei V. Filippenko, Elinor Gates, Jenny Greene, Weidong Li, Matthew A. Malkan, Daniel Stern, Takeo Minezaki

Physics

To investigate the black hole mass versus stellar velocity dispersion (M _BH-σ_*) relation of active galaxies, we measured the velocity dispersions of a sample of local Seyfert 1 galaxies, for which we have recently determined black hole masses using reverberation mapping. For most objects, stellar velocity dispersions were measured from high signal-to-noise ratio optical spectra centered on the Ca II triplet region (~8500 Å), obtained at the Keck, Palomar, and Lick Observatories. For two objects, in which the Ca II triplet region was contaminated by nuclear emission, the measurement was based on high-quality H-band spectra …

Effect Of Nanoparticle Surface Charge At The Plasma Membrane And Beyond, Rr Arvizo, Or Miranda, Ma Thompson, Cm Pabelick, R Bhattacharya, Jd Robertson, Vm Rotello, Ys Prakash, P Mukherjee

Vincent Rotello

Herein, we demonstrate that the surface charge of gold nanoparticles (AuNPs) plays a critical role in modulating membrane potential of different malignant and nonmalignant cell types and subsequent downstream intracellular events. The findings presented here describe a novel mechanism for cell-nanoparticle interactions and AuNP uptake: modulation of membrane potential and its effect on intracellular events. These studies will help understand the biology of cell-nanoparticle interactions and facilitate the engineering of nanoparticles for specific intracellular targets.

The Strength Of Statistical Evidence For Composite Hypotheses: Inference To The Best Explanation, David R. Bickel

COBRA Preprint Series

A general function to quantify the weight of evidence in a sample of data for one hypothesis over another is derived from the law of likelihood and from a statistical formalization of inference to the best explanation. For a fixed parameter of interest, the resulting weight of evidence that favors one composite hypothesis over another is the likelihood ratio using the parameter value consistent with each hypothesis that maximizes the likelihood function over the parameter of interest. Since the weight of evidence is generally only known up to a nuisance parameter, it is approximated by replacing the likelihood function with …

Interview With Brad Bateman, Costco, 2010 (Audio), Brad Bateman

All Sustainability History Project Oral Histories

Interview of Brad Bateman by Nemah Dalai at Costco Clackamas, Oregon on June 10th, 2010.

The interview index is available for download.

A Bright Molecular Core In A Crab Nebula Filament, E. D. Loh, J. A. Baldwin, Gary J. Ferland

Physics and Astronomy Faculty Publications

In a sub-arcsec near-infrared survey of the Crab Nebula using the new Spartan Infrared Camera, we have found several knots with high surface brightness in the H2 2.12 μm line and a very large H₂ 2.12 μm to Brγ ratio. The brightest of these knots has an intensity ratio I(H₂ 2.12 μm)/I(Brγ) = 18 ± 9, which we show sets a lower limit on the ratio of masses in the molecular and recombination (i.e., ionized) zones M _mol/M _rec ≥ 0.9, and a total molecular mass within this single knot M _mol ≥ …

Environmental Science, Its Importance And Integration, Sultan Alam

Professional Development Centre, Gilgit

No abstract provided.

Veritas 2008-2009 Monitoring Of The Variable Gamma-Ray Source M 87, P. T. Reynolds, Et. Al.

Physical Sciences Publications

M 87 is a nearby radio galaxy that is detected at energies ranging from radio to very high energy (VHE) gamma rays. Its proximity and its jet, misaligned from our line of sight, enable detailed morphological studies and extensive modeling at radio, optical, and X-ray energies. Flaring activity was observed at all energies, and multi-wavelength correlations would help clarify the origin of the VHE emission. In this paper, we describe a detailed temporal and spectral analysis of the VERITAS VHE gamma-ray observations of M 87 in 2008 and 2009. In the 2008 observing season, VERITAS detected an excess with a …

Variable-Density Flow Models Of Saltwater Intrusion In Coastal Landforms In Response To Climate Change Induced Sea Level Rise And A Chapter On Time-Frequency Analysis Of Ground Penetrating Radar Signals, Swagata Guha

USF Tampa Graduate Theses and Dissertations

Populations residing on and near the world’s coasts have become increasingly dependent on coastal groundwater for their supply of freshwater. Under the conditions of predicted climate changes, the expected rise in global sea level can adversely affect the quality and quantity of freshwater resources in coastal areas as a result of saltwater intrusion.

In this study, a suite of two- and three-dimensional variable-density groundwater flow models of major coastal landforms (e.g. deltas, estuaries and small islands) has been constructed to assess the effects of sea level rise (SLR), using different SLR rates of 0.5 m, 1m and 1.5 m over …

Restoration Of Mixed Conifer Communities Using Prescribed Fire In Bryce Canyon National Park, Michael J. Jenkins, Christopher Dicus, Joel E. Godfrey

Christopher Dicus

A fire history conducted in the mixed conifer community types of Bryce Canyon National Park found the mean fire-return interval has lengthened from 7.5 to 45 years since 1900. Dendroecology, species, diameter, and age-class analysis showed a change in stand composition in favor of white fir (Abies concolor) and Douglas-fir (Psuedotsuga menziesii) and a 200% increase in fuel accumulation. Recommendations for prescribed burning and mechanical reduction of fuels were incorporated into the Bryce Canyon management plan.

Characterization Of Stabilized Palladium Nanocatalysts, Meghann Broderick

Theses and Dissertations

Metal nanoparticles have received much interest for their application in catalysis due to high surface-to-volume ratios resulting in more available active sites. Ideally these catalysts are heterogeneous and allow for facile separation from the catalytic reaction mixture making them ideal for industrial application. Dispersed metal nanoparticles are explored due to their high reactivity in solution and are stabilized by surfactants and polymers. However, it is difficult to determine whether or not a catalyst is truly heterogeneous as a certain degree of leaching from the metal nanoparticle is inevitable. Determining the mechanisms involved in nanocatalysis is also a challenge. In this …

New Peptides Isolated From Lyngbya Species: A Review, Li Liu, Kathleen S. Rein

Department of Chemistry and Biochemistry

No abstract provided.

Testing General Relativity With Current Cosmological Data, Scott F. Daniel, Eric V. Linder, Tristan L. Smith, Robert R. Caldwell

Dartmouth Scholarship

Deviations from general relativity, such as could be responsible for the cosmic acceleration, would influence the growth of large-scale structure and the deflection of light by that structure. We clarify the relations between several different model-independent approaches to deviations from general relativity appearing in the literature, devising a translation table. We examine current constraints on such deviations, using weak gravitational lensing data of the CFHTLS and COSMOS surveys, cosmic microwave background radiation data of WMAP5, and supernova distance data of Union2. A Markov chain Monte Carlo likelihood analysis of the parameters over various redshift ranges yields consistency with general relativity …

An Effective Microwave-Induced Iodine-Catalyzed Method For The Synthesis Of Quinoxalines Via Condensation Of 12-Diamines With 12-Dicarbonyl Compounds, Debasish Bandyopadhyay, Sanghamitra Mukherjee, Robert R. Rodriguez, Bimal K. Banik

Chemistry Faculty Publications and Presentations

A microwave-induced iodine-catalyzed simple, rapid and convenient synthesis of different types of quinoxalines via condensation of 1,2-diamines with 1,2-dicarbonyl compounds has been accomplished with an excellent yield.

Gold Nanoparticle Self-Assembly Promoted By A Non-Covalent, Charge-Complemented Coiled-Coil Peptide, D Ernenwein, P Ghosh, V Rotello, J Chmielewski

Vincent Rotello

Non-covalent interactions between cationic gold nanoparticles and an anionic coiled-coil peptide were harnessed for coiled-coil mediated self-assembly of gold nanoparticles (GNPs)

Effects Of Restaurant Green Practices: Which Practices Are Important And Effective?, Eunha Jeong, Soocheong Jang

Caesars Hospitality Research Summit

As customers’ ecological concern is steadily increasing, demand for products and services designed to be less harmful to the environment has augmented. By executing green practices, many business owners believe the image of their companies can be improved. Furthermore, the improved image may eventually motivate the customers to use products or services offered by the green company. The restaurant industry is witnessing the green movement as well. Restaurant owners adopt green practices to their properties with the purpose of creating a distinctive image that can differentiate them from their competitors. Therefore, restaurateurs strive to get this competitive advantage by introducing …

Collaboration Methods For Social Service Agencies: A Case Study Of Johnson County, Indiana, Larry Noonan

Regis University Student Publications (comprehensive collection)

Enabled by a shared Information Technology platform, social service agencies can collaborate and share information to better serve clients holistically, improve the agency's ability to raise funds, provide better statistics to stake holders, and predict social services needed in the future. Social service agencies have many barriers to overcome before successful collaboration such as security, client confidentiality, choosing a software stack, cost, and agreement among the agencies on what information they can share. This paper presents practical methodologies that can be used towards the development of an IT platform to support the collaboration of social service agencies in a local …

Hotel Guests’ Perceptions Of Sustainable Hotel Practices In A Mexican Destination, Orie Berezan, Michelle Millar, Carola Raab

Caesars Hospitality Research Summit

Hotel selection and attributes that are important to travelers has been extensively researched using a variety of methods (Dolnicar, 2002). Dolnicar & Otter (2003) confirmed, after reviewing 21studies related to hotel attributes, cleanliness as the top priority, followed by hotel location. In total, 173 attributes were identified that were related to image, price/value, the hotel itself, and service (Lockyer, 2005). None of those attributes, however, were related to environmental attributes of a hotel. For more than a decade, the hospitality industry has been under pressure by government legislation and regulations to implement environmental strategies and thereby reduce their carbon footprint …

On Arc-Polarized Structures In The Solar Wind, B U. Sonnerup, S E. Haaland, G Paschmann

Dartmouth Scholarship

A theoretical model is proposed to account for some of the behavior of arc-polarized magnetic structures seen in the solar wind. To this end, an exact analytical solu- tion is developed that describes infinite plane wave trains of arbitrary amplitude in a plasma governed by ideal Hall MHD. The main focus is on intermediate-mode wave trains, which display double-branched magnetic hodogram signatures sim- ilar to those seen in the solar wind. The theoretically derived hodograms have field rotation in the ion-polarized sense at a slightly depressed field magnitude on one branch and an electron-polarized rotation at a slightly enhanced field …

On The Use Of Cartographic Projections In Visualizing Phylogenetic Treespace, Mark J. Clement, Quinn O. Snell, Kenneth Sundberg

Faculty Publications

Phylogenetic analysis is becoming an increasingly important tool for biological research. Applications include epidemiological studies, drug development, and evolutionary analysis. Phylogenetic search is a known NP-Hard problem. The size of the data sets which can be analyzed is limited by the exponential growth in the number of trees that must be considered as the problem size increases. A better understanding of the problem space could lead to better methods, which in turn could lead to the feasible analysis of more data sets. We present a definition of phylogenetic tree space and a visualization of this space that shows significant exploitable …

The Data Conservancy: Science-Driven Information Science, Christine L. Borgman, Carole L. Palmer

Christine L. Borgman

The Data Conservancy –which is a National Science Foundation funded Datanet project with a diverse array of partners – embraces a shared vision: data curation is not an end, but rather a means to collect, organize, validate, and preserve data to address grand research challenges that face society. Key to the data conservancy approach is information science research on the data practices of the science domains. Three teams are conducting social studies of individual science domains. Prof. Carole Palmer of the University of Illinois will report on their comparative studies of multiple biosciences domains. Prof. Christine Borgman of the University …

Towards A State Of Uberveillance, M.G. Michael, K. Michael

Associate Professor Katina Michael

Überveillance is an emerging concept, and neither its application nor its power have yet fully arrived [38]. For some time, Roger Clarke’s [12, p. 498] 1988 dataveillance concept has been prevalent: the “systematic use of personal data systems in the investigation or monitoring of the actions of one or more persons.” Almost twenty years on, technology has developed so much and the national security context has altered so greatly [52], that there is a pressing need to formulate a new term to convey both the resent reality, and the Realpolitik (policy primarily based on power) of our times. However, if …

The Legal, Social And Ethical Controversy Of The Collection And Storage Of Fingerprint Profiles And Dna Samples In Forensic Science, K. Michael

Associate Professor Katina Michael

The collection and storage of fingerprint profiles and DNA samples in the field of forensic science for non-violent crimes is highly controversial. While biometric techniques such as fingerprinting have been used in law enforcement since the early 1900s, DNA presents a more invasive and contentious technique as most sampling is of an intimate nature (e.g. buccal swab). A fingerprint is a pattern residing on the surface of the skin while a DNA sample needs to be extracted in the vast majority of cases (e.g. at times extraction even implying the breaking of the skin). This paper aims to balance the …

Social-Technical Issues Facing The Humancentric Rfid Implantee Sub-Culture Through The Eyes Of Amal Graafstra, Amal Graafstra, K. Michael, M.G. Michael

Associate Professor Katina Michael

Radio-frequency identification (RFID) tags and transponders have traditionally been used to identify domesticated animals so that they can be reunited with their owners in the event that they stray. In the late 1990s, industry started to investigate the benefits of using RFID to identifying non-living things throughout the supply chain toward new efficiencies in business operations. Not long after, people began to consider the possibilities of getting RFID tag or transponder implants for themselves. Mr Amal Graafstra of the United States is one of the first, and probably most well-known ‘do it yourselfer’ (DIY) implantees, who enjoys building customized projects …

Celogentin C And Thioviridamide: Synthetic And Structural Studies, Dmitry Nikolayevich Litvinov

Theses and Dissertations

Project I Celogentin C, isolated by Kobayashi from the seeds of Celosia argentea in 2001 exhibits strong inhibitory behavior towards polymerization of tubulin – globular protein, which plays crucial role during the cell division cycle. We have attempted synthesis of the left-hand ring of celogentin C via the intramolecular alkylation and the Knoevenagel condensation strategies. Utilizing synthetic methodologies in the field of nitroacetyl chemistry, developed by Kornblum and Rajappa we have successfully prepared the intermolecular Knoevenagel condensation product – the late-stage precursor to the left-hand ring of celogentin C. Synthesis of this key intermediate subsequently led to the preparation of …

Tobacco Mosaic Virus Based Thin Film Sensor For Detection Of Volatile Organic Compounds, Michael A. Bruckman, Jie Liu, Goutam Koley, Yu Li, Brian C. Benicewicz, Zhongwei Niu, Qian Wang

Faculty Publications

A thin film sensor for the detection of volatile organic compounds (VOC) was fabricated by deposition of oligo-aniline grafted tobacco mosaic virus (TMV) onto a glass substrate. The oligo-aniline motifs were conjugated onto the TMV surface by a traditional diazonium coupling reaction to tyrosine residues followed by Cu(I) catalyzed alkyne-azide cycloaddition (CuAAC) reaction. The modified TMV was easily fabricated into a thin film by directly drop coating onto a glass substrate. Upon integration of the glass substrate into a prototypical device, the virus-based thin film exhibited good sensitivity and selectivity toward ethanol and methanol vapour.

Evaluation Of Dnssec In Microsoft Windows And Microsoft Windows Server 2008 R2, Christopher Hair

Regis University Student Publications (comprehensive collection)

The Domain Name System (DNS) provides important name resolution services on the Internet. The DNS has been found to have security flaws which have the potential to undermine the reliability of many Internet-based systems. DNS Security Extensions (DNSSEC) offers a long-term solution these DNS security flaws. However, DNSSEC adoption has been slow because it is challenging to deploy and administer. DNSSEC has also been criticized for not being an "end-toend" solution. Microsoft included support for DNSSEC in its latest operating systems, Windows Server 2008 R2 and Windows 7. This thesis concluded that DNSSEC features in Windows Server 2008 R2 and …