Physical Sciences and Mathematics Commons^™

Geogram 2004, David J. Keeling Editor, Wku Department Of Geography And Geology

Earth, Environmental, and Atmospheric Sciences Publications

No abstract provided.

2004 (Fall), University Of Dayton. Department Of Mathematics

Colloquia

Abstracts of the talks given at the 2004 Fall Colloquium

Mercer Kernels For Object Recognition With Local Features, Siwei Lyu

Computer Science Technical Reports

In this paper, we propose a new class of kernels for object recognition based on local image feature representations. Formal proofs are given to show that these kernels satisfy the Mercer condition and reflect similarities between sets of local features. In addition, multiple types of local features and semilocal constraints are incorporated to reduce mismatches between local features, thus further improve the classification performance. Experimental results of SVM classifiers coupled with the proposed kernels are reported on ecognition tasks with the standard COIL-100 database and compared with existing methods. The proposed kernels achieved satisfactory performance and were robust to changes …

Efficient Wait-Free Implementation Of Multiword Ll/Sc Variables, Prasad Jayanti, Srdjan Petrovic

Computer Science Technical Reports

Since the design of lock-free data structures often poses a formidable intellectual challenge, researchers are constantly in search of abstractions and primitives that simplify this design. The multiword LL/SC object is such a primitive: many existing algorithms are based on this primitive, including the nonblocking and wait-free universal constructions of Anderson and Moir (1995), the closed objects construction of Chandra et al.(1998) and the snapshot algorithms of Jayanti (2002, 2004). In this paper, we consider the problem of implementing a W-word LL/SC object shared by N processes. The previous best algorithm, due to Anderson and Moir (1995), is time optimal …

Achromatic Angle-Insensitive Infrared Quarter-Wave Retarder Based On Total Internal Reflection At The Si–Sio2 Interface, R. M.A. Azzam, Cristina L. Spinu

Electrical Engineering Faculty Publications

An achromatic infrared (λ = 1.2–4 μm), Si-prism quarter-wave retarder (QWR) is described that uses total internal reflection at a buried Si–SiO₂ interface at an angle of incidence φ near 33°, where ∂Δ/∂φ = 0. The retardance Δ deviates from 90° by <±2° within a field of view of ±10° (in air) over the entire bandwidth. Because the SiO₂ layer at the base of the prism is optically thick, this QWR is unaffected by environmental contamination.

Fish Assemblage Stability Over Fifty Years In The Lake Pontchartrain Estuary; Comparisons Among Habitats Using Canonical Correspondence Analysis, Martin O'Connell, Robert Cashner, Christopher Schieble

Earth and Environmental Sciences Faculty Publications

We assessed fish assemblage stability over the last half century in Lake Pontchartrain, an environmentally degraded oligohaline estuary in southeastern Louisiana. Because assemblage instability over time has been consistently associated with severe habitat degradation, we attempted to determine whether fish assemblages in demersal, nearshore, and pelagic habitats exhibited change that was unrelated to natural fluctuations in environmental variables (e.g., assemblage changes between wet and dry periods). Collection data from three gear types (trawl, beach seine, and gill nets) and monthly environmental data (salinity, temperature, and Secchi depth) were compared for four collecting periods: 1954 (dry period), 1978 (wet period), 1996–1998 …

Santa Clara Magazine, Volume 46 Number 2, Fall 2004, Santa Clara University

Santa Clara Magazine

8 - PRIZE-WINNING POETRY By Alexander Matthew Weyand '04. A poem by an SCU junior wins two student poetry competitions at SCU.

10 - I HAVE A QUESTION By Miriam Schulman. The director of communications for the Markkula Center for Applied Ethics at SCU explores the ethics of Internet research.

14 - JUSTICE IS SERVED By Susan Vogel. The Santa Clara University Community Law Center celebrates 10 years of service with a new endowment and a new name.

Wide Angle Decentered Lens Beam Steering For Infrared Countermeasures Applications, Jennifer L. Gibson, Bradley D. Duncan, Edward A. Watson, John S. Loomis

Electro-Optics and Photonics Faculty Publications

A beam-steering system consisting of three cemented achromatic doublets is presented. Intended for use in IR countermeasure applications, our system is designed to operate over the 2- to 5-μm spectrum with minimum angular dispersion. We show that dispersion can be minimized by using doublet lenses fashioned from AMTIR-1 and germanium. Our system is designed to be compact and lightweight, with no internal foci, while allowing steering to ±22.5 deg. We also maintain a minimum 2-in. clear aperture for all steering angles, and a nominal divergence of 1 mrad. Plane wave and Gaussian beam analyses of our system are presented.

Ceg 333: Introduction To Unix, Bin Wang

Computer Science & Engineering Syllabi

This is a 2 credit hour course that has 10 50-minute lectures and I 0 50-minute Jab sessions. Introduction to the use of Unix and Unix tools as a problem-solving environment. Emphasis on the shell, files and directories, editing files, user process management, compiling, and debugging.

Ceg 361/561-01: Introduction To Software Testing, John A. Reisner

Computer Science & Engineering Syllabi

This course covers software testing strategies, along with established best practices, so students learn how to test their software in a complete and systematic (vice ad-hoc) manner. Particular attention is paid to planning, writing, and executing software testing documentation, i.e., software test plan, to include documented results. Various projects are assigned, designed to illustrate various challenges associated with software testing, and to reinforce the strategies and techniques used to overcome these challenges.

Ceg 476/676-01: Computer Graphics I, Lyubomir Zagorchev

Computer Science & Engineering Syllabi

An introduction to 2-D and 3-D computer graphics and their OpenGL implementations.

A Major Regional Air Pollution Event In The Northeastern United States Caused By Extensive Forest Fires In Quebec, Canada, Linsey J. Debell, Jack E. Dibb, R. Talbot, J W. Munger, E V. Fischer, Steve Frolking

Earth Sciences

During early July 2002, wildfires burned ∼1 × 10⁶ ha of forest in Quebec, Canada. The resultant smoke plume was seen in satellite images blanketing the U.S. east coast. Concurrently, extremely high CO mixing ratios were observed at the Atmospheric Investigation, Regional Modeling, Analysis and Prediction (AIRMAP) network sites in New Hampshire and at the Harvard Forest Environmental Measurement Site (HFEMS) in Massachusetts. The CO enhancements were on the order of 525–1025 ppbv above low mixing ratio conditions on surrounding days. A biomass burning source for the event was confirmed by concomitant enhancements in aerosol K⁺, NH …

Distributed Uniform Sampling In Real- World Networks, Asad Awan, Ronaldo A. Ferreira, Suresh Jagannathan, Ananth Y. Grama

Department of Computer Science Technical Reports

No abstract provided.

Randomized Leader Election, Murali Krishna Ramanathan, Ronaldo A. Ferreira, Suresh Jagannathan, Ananth Y. Grama

Department of Computer Science Technical Reports

No abstract provided.

Generating Sequences Of Clique-Symmetric Graphs Via Eulerian Digraphs, John P. Mcsorley, Thomas D. Porter

Articles and Preprints

Let {G_p1,G_p2, . . .} be an infinite sequence of graphs with G_pn having pn vertices. This sequence is called K_p-removable if G_p1 ≅ K_p, and G_pn − S ≅ G_p(n−1) for every n ≥ 2 and every vertex subset S of G_pn that induces a K_p. Each graph in such a sequence has a high degree of symmetry: every way of removing the vertices of any fixed number of disjoint K_p’s yields the same …

The Planet, 2004, Fall, Laurie Ballew, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.

Author Information

The Mathematics Enthusiast

No abstract provided.

The Morley Trisector Theorem, Grant Swicegood

The Mathematics Enthusiast

This paper deals with an unannounced theorem by Frank Morley that he originally published amid a collection of other, more general, theorems. Having intrigued mathematicians for the past century, it is now simply referred to as Morley’s trisector theorem:

The three intersections of the angles of a triangle, lying near the three sides respectively, form an equilateral triangle.

Scwds Briefs: Volume 20, Number 3 (October 2004), Michael J. Yabsley

Southeastern Cooperative Wildlife Disease Study: Publications

The Southeastern Cooperative Wildlife Disease Study (SCWDS) is conducting surveillance for exotic ticks on wildlife in the southeastern United States and Puerto Rico in cooperation with USDA-APHIS-Veterinary Services.
West Nile Virus in a South Carolina Deer
Persistence and Fate of Bird Carcasses: The findings from this study will provide information useful in interpretation of dead bird surveillance data and the potential for oral exposure to WNV among both avian and mammalian scavengers. These investigations constitute the M.S. project for Marsha Ward, a Warnell School of Forest Resources student affiliated with SCWDS.
Recent Cases of Hantavirus in West Virginia & Map …

Response Of The Martian Thermosphere/Ionosphere To Enhanced Fluxes Of Solar Soft X Rays, Jane L. Fox

Physics Faculty Publications

We have investigated the response of the thermosphere and ionosphere of Mars to enhanced fluxes of solar soft X rays, such as those that have been detected by the SNOE satellite (e.g., Bailey et al., 2000 ). We have constructed standard models by adopting the SC#21REFW and F79050N solar fluxes from H. E. Hinteregger (private communication) (see also Torr et al., 1979 ) for the low and high solar activity models, respectively. We then constructed enhanced soft X-ray models by multiplying the solar photon fluxes for wavelengths below 200 Å by a factor of 3 at low solar …

Historical Observations Of Humpback And Blue Whales In The North Atlantic Ocean: Clues To Migratory Routes And Possibly Additional Feeding Grounds, Randall Reeves, Tim D. Smith, Phillip Clapham, Elizabeth Josephson, Gillian Woolmer

United States Department of Commerce: Staff Publications

The seasonal distributions of humpback and blue whales (Megaptera novaeangliae and Balaenoptera musculus, respectively) in the North Atlantic Ocean are not fully understood. Although humpbacks have been studied intensively in nearshore or coastal feeding and breeding areas, their migratory movements between these areas have been largely inferred. Blue whales have only been studied intensively along the north shore of the Gulf of St. Lawrence, and their seasonal occurrence and movements elsewhere in the North Atlantic are poorly known. We investigated the historical seasonal distributions of these two species using sighting and catch data extracted from American 18th and …

The Perfect Microbial Symbiosis Hotel: Marine Sponges, Jose V. Lopez

Marine & Environmental Sciences Faculty Articles

No abstract provided.

Evidence Of Shark Predation And Scavenging On Fishes Equipped With Pop-Up Satellite Archival Tags, David W. Kerstetter, J. Polovina, John E. Graves

Marine & Environmental Sciences Faculty Articles

No abstract provided.

The Armstrong Chemical Bond, Armstrong Atlantic State University

Chemical Bond Newsletter (2004-2005)

No abstract provided.

Regular Polytopes, Jonathan Comes

The Mathematics Enthusiast

In the last proposition of the Elements Euclid proved that there are only five regular polyhedra, namely the tetrahedron, octahedron, icosahedron, cube, and dodecahedron. To show there can be no more than five he used the fact that in a polyhedra, the sum of the interior angles of the faces which meet at each vertex must be less than 360.

Modulation Of Airway Inflammation By Immunostimulatory Cpg Oligodeoxynucleotides In A Murine Model Of Allergic Aspergillosis, Banani Banerjee, Kevin J. Kelly, Jordan N. Fink, James D. Henderson Jr., Naveen K. Bansal, Viswanath P. Kurup

Mathematics, Statistics and Computer Science Faculty Research and Publications

Allergic aspergillosis is a Th2 T-lymphocyte-mediated pulmonary complication in patients with atopic asthma and cystic fibrosis. Therefore, any therapeutic strategy that selectively inhibits Th2 T-cell activation may be useful in downregulating allergic lung inflammation in asthma. In the present study, we developed a CpG oligodeoxynucleotide (ODN)-based immune intervention of allergic inflammation in a mouse model of allergic aspergillosis. Four different groups of mice were used in a short-term immunization protocol. Three experimental groups of animals (groups 1 to 3) were sensitized with Aspergillus fumigatus antigens. Animals in group 1 were immunized with A. fumigatus antigen alone, while those in group …

Compliant Encryption Of Jpeg2000 Codestreams, Yongdong Wu, Robert H. Deng

Research Collection School Of Computing and Information Systems

This paper presents a compliant encryption method for JPEG 2000 codestreams such that the encryption process does not introduce superfluous JPEG2000 markers in the protected codestream, i.e., the protected codestream preserves the syntax of the original codestream. The proposed encryption method works with any standard ciphers, incurs no storage overhead, introduces negligible computational cost and maintains all the desirable properties of the original JPEG 2000 codestream such as error resilience and scalability.

Nonrelativistic Qed Approach To The Bound-Electron G Factor, Krzysztof Pachucki, Ulrich D. Jentschura, Vladimir A. Yerokhin

Physics Faculty Research & Creative Works

Within a systematic approach based on nonrelativistic quantum electrodynamics, we derive the one-loop self-energy correction of order α ( Z α )⁴ to the bound-electron g factor. In combination with numerical data, this analytic result improves theoretical predictions for the self-energy correction for carbon and oxygen by an order of magnitude. Basing on one-loop calculations, we obtain the logarithmic two-loop contribution of order α² ( Z α )⁴ ln [ ( Z α )^{- 2} ] and the dominant part of the corresponding constant term. The results obtained improve the accuracy of the theoretical predictions for …

Fully Differential Three-Dimensional Angular Distributions Of Electrons Ionized In Ion-Atom Collisions, Michael Schulz, R. Moshammer, Daniel Fischer, Ahmad Hasan, N. V. Maydanyuk, J. D. Ullrich

Physics Faculty Research & Creative Works

We compare experimental fully differential three-dimensional angular distributions of electrons ionized from He in collision with ionic projectiles covering a broad range of perturbations (0.065 to 4.4). Even at very small perturbations clear signatures of higher-order contributions are observable. At large perturbations, such contributions become even dominant, especially those involving the post-collision interaction between the outgoing projectile and the ionized electron. Our results show that single ionization is not nearly as well understood as was assumed previously.

Nucleation Near The Spinodal: Limitations Of Mean Field Density Functional Theory, Gerald Wilemski, Jin-Song Li

Physics Faculty Research & Creative Works

We investigate the diverging size of the critical nucleus near the spinodal using the gradient theory ~GT! of van der Waals and Cahn and Hilliard and mean field density functional theory ~MFDFT!. As is well known, GT predicts that at the spinodal the free energy barrier to nucleation vanishes while the radius of the critical fluctuation diverges. We show numerically that the scaling behavior found by Cahn and Hilliard for these quantities holds quantitatively for both GT and MFDFT. We also show that the excess number of molecules Dg satisfies Cahn-Hilliard scaling near the spinodal and is consistent with the …