Physical Sciences and Mathematics Commons^™

Variation Of Groundwater Quality Of Telkaif Area, North Of Mosul City, Irak, Taha Hussein Al-Salim

Bulletin of the Mineral Research and Exploration

No abstract provided.

Take Pride In America In Southern Nevada: Quarterly Progress Report, Period Covering April 6, 2009 – July 5, 2009, Margaret N. Rees

Anti-littering Programs

• Exploratory development of an adopt-a-block program was initiated to address the litter and desert dumping problems that exist in the urban-public land interfaces throughout Clark County began.
• Draft of SNAP recycling feasibility report was completed.
• Preliminary field data form was revised for GIS database project.
• Phase III media campaign began.
• Ten clean-up events were conducted this quarter.
• The team provided 534 cubic yards of roll-off space for clean-ups.

Water Chemistry And Isotope Studies In Aksaray Geothermal Fields (Acigöl – Zi̇ga Şahi̇nkalesi̇), Central Anatolia, Turkey, Musa Burçak

Bulletin of the Mineral Research and Exploration

No abstract provided.

New Species “Miogypsinoides Akcadagensis N. Sp.” From A Chattian Deposit From Akçadağ Region, Malatya, Turkey, Fatma Gedi̇k, Ercüment Si̇rel

Bulletin of the Mineral Research and Exploration

No abstract provided.

Weighted Composition Operators From Logarithmic Bloch-Type Spaces To Bloch-Type Spaces, Stevo Stevic, Ravi P. Agarwal

Mathematics and System Engineering Faculty Publications

The boundedness and compactness of the weighted composition operators from to Bloch-type spaces are studied here. © 2009 S. Stević and R. P. Agarwal.

Formal Verification Of Scalable Nonzero Indicators, Jun Sun, Yang Liu, Jun Sun, Jin Song Dong, Wei Chen, Yanhong A. Liu

Research Collection School Of Computing and Information Systems

Concurrent algorithms are notoriously difficult to design correctly, and high performance algorithms that make little or no use of locks even more so. In this paper, we describe a formal verification of a recent concurrent data structure Scalable NonZero Indicators. The algorithm supports incrementing, decrementing, and querying the shared counter in an efficient and linearizable way without blocking. The algorithm is highly non-trivial and it is challenging to prove the correctness. We have proved that the algorithm satisfies linearizability, by showing a trace refinement relation from the concrete implementation to its abstract specification. These models are specified in CSP and …

Analysis Of Deni̇zli̇ Earthquakes According To Their Activity And Cumulative Activity Terms, Mehmet Utku

Bulletin of the Mineral Research and Exploration

No abstract provided.

Dynamics Of Wind-Driven Upwelling And Relaxation Between Monterey Bay And Point Arena: Local-, Regional-, And Gyre-Scale Controls, James M. Pringle, Edward P. Dever

Earth Sciences

In north and central California, equatorward winds drive equatorward flows and the upwelling of cold dense water over the shelf during the midspring and summer upwelling season. When the winds temporarily weaken, the upwelling flows between Point Reyes and Point Arena "relax,'' becoming strongly poleward over the shelf. Analytical and numerical models are used to describe the effect of alongshore variability of winds, bathymetry, and basin-scale pressure gradients on the strength of upwelling and its relaxation. Alongshore winds weaken to the south of Point Reyes, and the shelf becomes narrower from Point Reyes to Monterey Bay. Both of these lead …

Meta-Analysis Using Bayesian Hierarchical Models In Organizational Behavior, Michael David Ulrich

Theses and Dissertations

Meta-analysis is a tool used to combine the results from multiple studies into one comprehensive analysis. First developed in the 1970s, meta-analysis is a major statistical method in academic, medical, business, and industrial research. There are three traditional ways in which a meta-analysis is conducted: fixed or random effects, and using an empirical Bayesian approach. Derivations for conducting meta-analysis on correlations in the industrial psychology and organizational behavior (OB) discipline were reviewed by Hunter and Schmidt (2004). In this approach, Hunter and Schmidt propose an empirical Bayesian analysis where the results from previous studies are used as a prior. This …

Musical Query-By-Content Using Self-Organizing Maps, Kyle B. Dickerson

Theses and Dissertations

The ever-increasing density of computer storage devices has allowed the average user to store enormous quantities of multimedia content, and a large amount of this content is usually music. Current search techniques for musical content rely on meta-data tags which describe artist, album, year, genre, etc. Query-by-content systems, however, allow users to search based upon the actual acoustical content of the songs. Recent systems have mainly depended upon textual representations of the queries and targets in order to apply common string-matching algorithms and are often confined to a single query style (e.g., humming). These methods also lose much of the …

Modeling Temperature Reduction In Tendons Using Gaussian Processes Within A Dynamic Linear Model, Richard David Wyss

Theses and Dissertations

The time it takes an athlete to recover from an injury can be highly influenced by training procedures as well as the medical care and physical therapy received. When an injury occurs to the muscles or tendons of an athlete, it is desirable to cool the muscles and tendons within the body to reduce inflammation, thereby reducing the recovery time. Consequently, finding a method of treatment that is effective in reducing tendon temperatures is beneficial to increasing the speed at which the athlete is able to recover. In this project, Bayesian inference with Gaussian processes will be used to model …

Acoustically Driven Oscillations Of Freely Suspended Liquid Crystal Filaments, J. Petzold, A. Nemes, A. Eremin, C. Bailey, N. Diorio, Antal Jakli, R. Stannarius

Antal Jakli

Some liquid crystalline phases of bent-core mesogens are known to form stable freely-suspended filaments with length to diameter ratios of 1000 and larger. These structures can behave like thin liquid chords. We study filament oscillations excited with harmonic sound waves. From amplitudes of the filament motion and phase shifts respective to the harmonic excitation signal we develop a model for the filament dynamics. Like in solid chords, the resonance frequency f(0) is inversely proportional to their length. The dependence of f(0) upon the filament radius allows one to draw conclusions on the nature of the filament tension. For thin filaments, …

Field Evidence Of A Negative Correlation Between Saturated Hydraulic Conductivity And Soil Carbon In A Sandy Soil, Tiejun Wang, David A. Wedin, Vitaly A. Zlotnik

Department of Earth and Atmospheric Sciences: Faculty Publications

Soil organic matter (SOM) is generally assumed to be positively correlated with saturated hydraulic conductivity (KS). However, recent studies of pedotransfer functions suggest a possible negative KS-SOM relationship that still needs independent verification. Our field KS study of sandy soils in a semiarid region provides such in situ evidence of a negative KS-SOM relationship, which is nonlinear and is strongest at the lowest levels of soil carbon (<0.1%). A regression analysis also shows that soil carbon is an important factor for explaining KS in those soils. The likely reason for the observed negative KS-SOM relationship is a reduced wettability caused by SOM, which is believed to outweigh the impacts of any increase in KS caused by soil aggregation. The low SOM content and large particle size of sand may explain the limited effect of SOM on soil aggregation processes in the examined soils.

Water Current, Volume 41, No. 3, Summer 2009

Water Current Newsletter

One-Two-Three Punch Clobbers Toxic Algae, Restores Fremont Lake
Fall Platte River Basin Science and Resource Management Symposium: October 14 and 15 in Kearney
Lessons On Water Scarcity
Meet the Faculty: Robert J. ‘Bob’ Oglesby, Ph.D.
Meet the Faculty: Karrie A. Weber, Ph.D.
Study: Low Flows on Niobrara Could Result in Economic Losses Water
Featured Partner: Audubon Nebraska
Sediment, Microbes and Environmental Fate of Emerging Contaminants
WRAP Update
Vance Anderson Receives Kremer Award
2009 UNL Water and Natural Resources Tour of the Bay-Delta Region of Northern California: June 15-18, 2009<
UNL Extension Continues Helping Farmers Learn Irrigation Strategies to use Less …

Paragneiss Zircon Geochronology And Trace Element Geochemistry, North Qaidam Hp/Uhp Terrane, Western China, Chris G. Mattinson, Joseph L. Wooden, Jian-Xin Zhang, D. K. Bird

All Faculty Scholarship for the College of the Sciences

In the southeastern part of the North Qaidam terrane, near Dulan, paragneiss hosts minor peridotite and UHP eclogite. Zircon geochronology and trace element geochemistry of three paragneiss samples (located within a ∼3 km transect) indicates that eclogite-facies metamorphism resulted in variable degrees of zircon growth and recrystallization in the three samples. Inherited zircon core age groups at 1.8 and 2.5 Ga suggest that the protoliths of these rocks may have received sediments from the Yangtze or North China cratons. Mineral inclusions, depletion in HREE, and absence of negative Eu anomalies indicate that zircon U-Pb ages of 431 ± 5 Ma …

Exchange Gas Vibration Isolation For A “Dry” Research Cryostat, S. T. P. Boyd, A. V. Pregenzer-Wenzler

Physics & Astronomy Faculty and Staff Publications

Thermal contact to a mechanical refrigerator via 1 atm helium exchange gas provides the best known vibration floor for dry cryostats We describe initial performance measurements of a new cryostat designed to implement this approach.

A High-Resolution Record Of Atmospheric Dust Composition And Variability Since Ad 1650 From A Mount Everest Ice Core, S. Kaspari, Paul Andrew Mayewski, M. Handley, Shichang Kang, S. Hou, Sharon B. Sneed, Kirk A. Maasch, D. Qin

Earth Science Faculty Scholarship

A Mount Everest ice core analyzed at high resolution for major and trace elements (Sr, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, Lu, Bi, U, Tl, Al, S, Ca, Ti, V, Cr, Mn, Fe, Co) and spanning the period A. D. 1650- 2002 is used to investigate the sources of and variations in atmospheric dust through time. The chemical composition of dust varies seasonally, and peak dust concentrations occur during the winter-spring months. Significant correlations between the Everest dust record and dust observations at stations suggest that the Everest record is representative of …

Mammal-Eating Killer Whales And Their Prey—Trend Data For Pinnipeds And Sea Otters In The North Pacific Ocean Do Not Support The Sequential Megafaunal Collapse Hypothesis, P. R. Wade, J. M. Ver Hoef, D. P. Demaster

United States Department of Commerce: Staff Publications

Springer et al. (2003) proposed a sequential megafauna collapse hypothesis to explain the decline of pinniped species and northern sea otters in the North Pacific. This hypothesis has been critiqued at length by DeMaster et al. (2006), Mizroch and Rice (2006), Trites et al. (2007), and Wade et al. (2007). At the core of the sequential megafauna collapse (SMC) hypothesis is the idea that predation by killer whales caused the sequential declines of four prey species (Springer et al. 2003) in the vicinity of the Aleutian Islands, Bering Sea, and Gulf of Alaska. Wade et al. (2007) plotted trends regionally …

Use Of Co2 Concentration Difference Or Co2 Balance To Assess Ventilation Rate Of Broiler Houses, Hongwei Xin, Hong Li, Robert T. Burns, Richard S. Gates, Douglas G. Overhults, John W. Earnest

Biosystems and Agricultural Engineering Faculty Publications

Ventilation rate (VR) is one of the two key elements for quantifying aerial emissions from animal production facilities. Direct, continuous measurement of building VR can be challenging and impractical under certain circumstances,e.g., naturally ventilated animal housing or a large number of ventilation fans in the building. This study examined the suitability of estimating VR of broiler houses with built‐up litter (mixture of manure and bedding), when supplemental heating was not in use, through either carbon dioxide (CO₂) balance or the relationship of VR to CO₂ concentration difference between exhaust and inlet air. The reference VR was based …

Nuclear Testing And Proliferation – An Inextricable Connection, Thomas Graham Jr., David W. Hafemeister

Physics

No abstract provided.

Section Abstracts: Astronomy, Mathematics, And Physics & Materials Science

Virginia Journal of Science

Abstracts of the Astronomy, Mathematics and Physics & Materials Science Section for the 87th Annual Meeting of the Virginia Academy of Science, May 27-29, 2009, Virginia Commonwealth University, Richmond VA.

Section Abstracts: Computer Science

Virginia Journal of Science

Abstracts of the Computer Science for the 87th Annual Meeting of the Virginia Academy of Science, May 27-29, 2009, Virginia Commonwealth University, Richmond Virginia.

Section Abstracts: Environmental Science

Virginia Journal of Science

Abstracts of the Environmental Sciences Section for the 87th Annual Meeting of the Virginia Academy of Science, May 27-29, 2009, Virginia Commonwealth University, Richmond, Virginia.

Section Abstracts: Statistics

Virginia Journal of Science

Abstracts of the Statistics Section for the 87th Annual Meeting of the Virginia Academy of Science, May 27-29, 2009, Virginia Commonwealth University, Richmond, VA.

Tectonics Of Quaternary Travertine Accumulation At Al-Fatha Area In Middle Iraq, Ibrahim S. Al- Jumaily, Nazar M.S. Numan

Bulletin of the Mineral Research and Exploration

No abstract provided.

Thermodynamic Stability Of Transition States In Nanosystems, Alexander Umantsev

Chemistry and Physics Faculty Working Papers

We present a theory which shows that, in a closed system of fixed volume capable of undergoing a phase transition, the transition state can be thermodynamically stable against the bulk phases if a certain material parameters criterion is fulfilled. In a small system below the critical size the transition state turns into a globally stable phase that can be observed experimentally. This effect is analogous to stabilization of icosahedral structures in clusters of certain sizes and energies. Stabilization of the transition state in small systems of limited resources allows us to conjecture that, in the case of a melting/freezing transition …

Constructed Response Answers In A Multiple-Choice Universe, Carl W. David

Chemistry Education Materials

A scheme is introduced which allows computer readable multiple choice forms used in traditional examinations to be employed for constructed response items.

Green Pond Harbor Management Plan (Draft), Urban Harbors Institute, University Of Massachusetts Boston

Urban Harbors Institute Publications

Green Pond is one of a number of coastal ponds in Falmouth. It covers over 135 acres and is an important natural and recreational resource for the people of Falmouth and visitors. Most of the area around the pond is private residential property interspersed with a few commercial businesses and open space. As with other areas of Massachusetts, the tidelands around the pond fall within the jurisdiction of Chapter 91 (the Massachusetts Public Waterfront Act). Through Chapter 91, the Commonwealth seeks to preserve and protect the rights of the public, and to guarantee that private uses of tidelands and waterways …

Electrospinning Route For The Fabrication Of P-N Junction Using Nanofiber Yarns, A. F. Lotus, S. Bhargava, E. T. Bender, E. A. Evans, R. D. Ramsier, D. H. Reneker, George G. Chase

Chemical, Biomolecular, and Corrosion Engineering Faculty Research

Electrospinning is a simple, versatile, and cost effective method for generating nanoscale fibers, wires, and tubes. Nanowires and nanotubes could be important building blocks for nanoscale electronics, optoelectronics, and sensors as they can function as miniaturized devices as well as electrical interconnects. We report on a simple method to fabricate free standing ceramic nanofiber heterostructures, which exhibit rectifying behavior of a p-n junction.

Beautifying Data In The Real World, Andrew Lang, Jean-Claude Bradley, Rajarshi Guha, Pierre Lindenbaum, Cameron Neylon, Anthony J. Williams, Egon Willighagen

College of Science and Engineering Faculty Research and Scholarship

There are at least two problems with collecting "Beautiful Data" in the real world and presenting it to the interested public. The first is that the universe is inherently noisy. In most cases collecting the same piece of data twice will not give the same answer. This is because the collection process can never be made completely error-free. Fluctuations of temperature, pressure, humidity, power sources, water or reagent quality, precision of weighing, or human error will all conspire to obscure the “correct” answer. The art in experimental measurement lies in designing the data collection process so as to minimize the …