Digital Commons Network^™

Mercury Exchange Between The Atmosphere And Low Mercury Containing Substrates, Mae Sexauer Gustin, Mark Engle, Jody Ericksen, Seth N. Lyman, Jelena Stamenkovic, Mei Xin

USU Uintah Basin Faculty Publications

Mercury is emitted to the air from Hg-enriched and low Hg-containing (natural background) substrates. Emitted Hg can be geogenic, or can be derived from the re-emission of Hg that was previously deposited to the soil from the atmosphere. Atmospheric Hg can be derived from natural and/or anthropogenic sources and can be deposited by wet or dry processes. It is important to understand the relative magnitude of emission, deposition, and re-emission of Hg associated with terrestrial ecosystems with natural background soil Hg concentrations because these landscapes cover large terrestrial surface areas. This information is also important for developing biogeochemical mass balances, …

Effect Of Staged Practices And Motivational Climate On Goal Orientation And Sportsmanship In Community Youth Sport Experiences, Mary Sara Wells, Gary D. Ellis, Skye G. Arthur-Banning, Mark F. Roark

Kinesiology and Health Science Faculty Publications

Significant acts of poor sportsmanship and aggression are becoming increasingly prevalent in youth sports. Youth who have negative experiences as a result of witnessing or being directly involved in such poor sportsmanship experiences are less likely to participate in future sport activities, thereby contributing to sedentary lifestyles and a number of health related problems. Goal orientation theory provides a basis for understanding why many of these unsporting acts may occur. “Task-oriented” participants focus on their intra-individual growth and development in sports and tend to be much less involved in aggression and poor sportsmanship. In contrast, “Egooriented” participants judge success in …

Perspectives On Teachers As Digital Library Users: Consumers, Contributors, And Designers, Mimi Recker

Instructional Technology and Learning Sciences Faculty Publications

"...freed of the constraints of physical space and media, digital libraries can be more adaptive and reflective of the communities they serve. They should be collaborative, allowing users to contribute knowledge to the library, either actively through annotations, reviews, and the like, or passively through their patterns of resource use. In addition, they should be contextual, expressing the expanding web of inter-relationships and layers of knowledge that extend among selected primary resources. In this manner, the core of the digital library should be an evolving information base, weaving together professional selection and the 'wisdom of crowds.'" (Lagoze, Krafft, Payette, & …

Effects Of Irrigation And Mowing On Species Diversity Of Grass And Wildflower Mixtures For The Intermountain West, Daniel W. Dewey, Paul G. Johnson, Roger Kjelgren

Plants, Soils, and Climate Faculty Publications

Grass and wildflower mixtures can be aesthetically appealing, water-conserving, low-maintenance alternatives to conventional turfgrass. One problem with these mixtures is loss of species diversity over time. We examined the effects of irrigation and mowing on the species diversity of 3 grass and wild-flower mixtures. The nonirrigated and non-mowed treatment combination maintained diversity most effectively whereas the irrigated and mowed treatment combination was least effective. Generally, when the irrigation treatment was significant (P < 0.05), irrigated plots contained more wildflowers. When the mowing treatment was significant (P < 0.05), mowed plots contained more common yarrow (Achillea millefolium L. [Asteraceae]) and strawberry clover (Trifolium fragiferum L. [Fabaceae]) and fewer Pacific aster (Symphyotrichum chilense (Nees) Nesom [Asteraceae]). Height measurements on non-mowed plots showed that irrigated plots had taller canopies than nonirrigated plots. Common yarrow was the most competitive wildflower, followed by strawberry clover and Pacific aster. Mixture 3 containing crested wheatgrass (Agropyron cristatum (L.) Gaertn. [Poaceae]) and thickspike wheatgrass (Elymus lanceolatus (Scribn. & J.G. Sm.) Gould ssp. lanceolatus [Poaceae]) maintained species diversity for the longest duration under nonirrigated and non-mowed conditions.

The Influence Of Low Humidity, Pseudacteon Flies, And Competition By Solenopsis Xyloni On Solenopsis Invicta, Ricardo A. Ramirez, D C. Thompson, M D. Remmenga

Biology Faculty Publications

Red imported fire ant, Solenopsis invicta Buren, is a serious pest in the southeastern United States. It has caused economic losses in agricultural products, stings can cause anaphylactic shock, and it has reduced biodiversity. S. invicta has displaced native ant species throughout its range, presumably by competitive exclusion. In 1998, S. invicta populations were confirmed in southern New Mexico, resulting in a quarantine of Doña Ana County. Although large populations of the native southern fire ant, S. xyloniMcCook, are common in the Mesilla Valley, only two small populations of S. invicta have been found since the initial quarantine. It is …

Inst7870 - Data Visualization Theory & Practice, Fall 2006, Brett Shelton

Instructional Technology & Learning Sciences - OCW

In this course you will explore the question of what visualization is, and why you should use visualizations for quantitative data. In doing so, you will address theoretical concepts and examine case studies that show the importance of effective visualizations in real world settings.

You will also look at how to interpret meanings in visualizations. Elements of cognitive science theory are addressed, and you will practice techniques to help with your interpretations. An additional objective will center on how to create meaning with your own visualizations, then examine appropriate forms for representation and also review design considerations.

In the lab …

Inst5270 - Flash, Fall 2006, Andrew Walker

Instructional Technology & Learning Sciences - OCW

This course uses Flash 8/Actionscript 2.0. You may also be interested in INST 5245, which uses Flash CS3 (Flash 9)/Actionscript 3.0.

This course familiarizes students with Macromedia Flash. Topics to be covered include fundamental programming concepts (variables, variable types, code re-use, commenting code, and basic control structures) in addition to the fundamentals of the flash environment (animation or “tweening”, vector graphics, use of sound and video). Students finishing this course will have at least one completed fully functional Flash project for their portfolios demonstrating a strong knowledge of the tool and a good foundation in the ActionScript language as the …

Oer Ppp - Power Of Positive Parenting, Fall 2006, Glenn I. Latham

Family, Consumer, & Human Development - OCW

This course has been developed using portions from several of the books, videos, and audio products produced by Glenn Latham. These materials will give parents the skills necessary to raise children well. Glenn Latham said of his book, The Power of Positive Parenting, which is his definitive book, upon which this course is built, that it has been “subjected to more independent, scientific scrutiny than any parenting book in print today. In every instance, it has been shown to be an effective parenting tool. For that reason, it has been adopted by parent training programs, schools, university professors, early childhood …

Polymorphism And Growth Behavior Of Low-Trans Fatty Acids Blends Formulated With And Without Emulsifiers, Marina Cerdeira, Silvana Martini, Roberto J. Candal, Maria L. Herrera

Nutrition, Dietetics, and Food Sciences Faculty Publications

Polymorphism and growth behavior of blends of a high-melting fraction of milk fat (HMF) and sunflower oil (SFO) formulated with and without the addition of sucrose esters (SE) P-170, P-1670, and S-170 were studied by pulsed 1H NMR spectroscopy, X-ray diffraction, and polarized light microscopy. The effect of SE on the solid content maximum (S max) or crystallization rate was observed only at low supercooling (values of ΔT below 15°C). The Avrami k n decreased as n values increased, indicating that SE inhibited growth and impeded nucleation. Addition of SFO modified the polymorphic behavior of milk fat, most likely owing …

A Probabilistic Approach To Model The Nonisothermal Nucleation Of Triacylglycerol Melts, Alejandro G. Marangoni, Thomas C. Aurand, Silvana Martini, Michel Ollivon

Nutrition, Dietetics, and Food Sciences Faculty Publications

Crystallization studies are usually performed under isothermal conditions. Kinetic parameters characterizing the isothermal nucleation and growth processes can be obtained using classical nucleation and growth models. However, crystallization regimes found in nature, as well as those used in food and pharmaceutical processing, are rarely isothermal. Focusing on the nucleation stage, the approach followed in this work was to define a new parameter to characterize the driving force of nucleation, the supercooling-time exposure (β), which not only depends on the difference between the melting temperature (Tm) and the onset temperature of nucleation (Tc) ΔTc but also on the induction time of …

Federal Environmental Impact Statements: Overly Inflated Needs Result In Needlessenvironmental Harm, Gorden Steinhoff

Languages, Philosophy, and Communication Studies Faculty Publications

According to federal regulations, an Environmental Impact Statement (EIS) must include a statement of the purpose of, and need for, the proposed action. Unfortunately, the regulations do not specify how to determine the need. Typically, the declared need for a proposed action includes items that are not genuine needs. They are necessary conditions for achieving goals that are merely desired. The result of such overly inflated needs is, literally, needless environmental harm. The author presents criteria for identifying needs that have been developed by philosophers David Braybrooke and Garrett Thomson. These criteria are useful for gauging how far federal agencies …

The Water Vapor Permeability Of Polycrystalline Fat Barrier Films, Silvana Martini, D. A. Kim, M. Ollivon, A. G. Marangoni

Nutrition, Dietetics, and Food Sciences Faculty Publications

The water vapor permeability of fat barrier films has been associated with structural characteristics such as polymorphism, crystal size, and chemical composition, among others. However, no mechanistic models have been proposed to describe this relationship. In this study, we have determined the effects of processing conditions on the structure and physicochemical characteristics of four fats and their relationship to water vapor permeability. Results suggest that the solids' volume fraction and the domain size of the fat crystals seem to be the most important factors controlling water vapor migration. Moreover, materials with relatively large crystalline domains will yield malleable films with …

Queen Weights Of Polygyne Solenopsis Invicta And S. Xyloni Suggest Reduced Competitive Ability, Ricardo A. Ramirez, D C. Thompson

Biology Faculty Publications

Solenopsis invicta Buren populations were confirmed in southern New Mexico, resulting in a quarantine of Doña Ana County in 1998; however, Solenopsis xyloni McCook remains the dominant fire ant. This study compared the queen weights and egg production of polygyne colonies of both species. There was no difference in live weights of the major worker caste; however, queens were very different in weight. In this study, S. invicta queens weighed almost twice as much as S. xyloni (S. invicta = 11.32 ± 0.25mg vs. S. xyloni = 6.40 ± 0.30mg) and produced over 50% as many eggs as S. xyloni. …

Cee3030 - Uncertainty In Engineering Analysis, Spring 2006, Gilberto E. Urroz

Civil and Environmental Engineering - OCW

This course on uncertainty in engineering analysis can also be referred to as probability and statistics for engineers. In particular, we will deal with the applications of probability and statistics to problems related to civil and environmental engineering. Note: Technical Requirements, Maple 10 by Maplesoft

Cee3500 - Fluid Mechanics, Spring 2006, Gilberto E. Urroz

Civil and Environmental Engineering - OCW

Explores fluid properties, hydrostatics, fluid dynamics, similitude, energy and momentum principles, closed conduit flow, open channel flow, and flow measurement. Includes laboratory exercises in flow measurement, open channel flow, pipe friction, physical modeling, and data collection.

Stewardship And The Concept Of Yield In Landscape Water Conservation, Larry A. Rupp, Roger Kjelgren

Plants, Soils, and Climate Faculty Publications

Growing up in what was rural Salt Lake County, my peers and I never knew a time when questions of water did not flow through our lives as surely as it flowed through the canals and irrigation ditches. We played in the flood of water pumped from the ditch onto our lawn, and we floated homemade rafts down the canal in the heat of the summer. We listened in amazement to descriptions of how the canals were built and wondered when we would be big enough to be asked to join the cooperative crew that skimmed the ditches in the …

Structural Evolution And Vorticity Of Flow During Extrusion And Exhumation Of The Greater Himalayan Slab, Mount Everest Massif, Tibet/Nepal: Implications For Orogen-Scale Flow Partitioning, M. J. Jessup, R. D. Law, M. P. Searle, Mary S. Hubbard

Geosciences Faculty Publications

The Greater Himalayan Slab (GHS) is composed of a north-dipping anatectic core, bounded above by the South Tibetan detachment system (STDS_ and below by the Main Central thrust zone (MCTZ). Assuming simultaneous movement on the MCTZ and STDS, the GHS can be modelled as a southward-extruding wedge or channel. New insights into extrusion-related flow with the GHS emerge from detailed kinematic and vorticity analyses in the Everest region. At the highest structural levels, mean kinematic vorticity number (Wm) estimates of 0.74-0.91 (c. 45-28% pure shear) were obtained from sheared Tethyan limestone and marble from the Yellow Band on Mount Everest. …

Cee6510 - Numerical Methods In Civil Engineering, Spring 2006, Gilberto E. Urroz

Civil and Environmental Engineering - OCW

Engineering applications of approximation and interpolation, solution methods for ordinary differential equations, numerical solution of partial differential equations, nonparametric and parametric probability and regression estimation, and Monte Carlo and uncertainty analysis.

Technical Requirements: Maple 10 by Maplesoft,

Matlab

Background Behavior In Live Debates: The Effects Of The Implicit Ad Hominem Fallacy, John S. Seiter, Harold J. Kinzer, Harry Weger Jr.

Languages, Philosophy, and Communication Studies Faculty Publications

This study examined the effects of background nonverbal behavior displayed with the purpose of undermining one's opponent in live debates. Students participated as audience members in one of three versions of a live debate. In one version, the nonspeaking debater remained “stone faced” during her opponent's speech, while in the other two she displayed either occasional or nearly constant nonverbal disagreement. After viewing the debates, students rated the debaters' credibility, appropriateness, and debating skills, in addition to judging who won the debate. Analysis indicated that background nonverbal behavior influenced audience perceptions of some, but not all, dimensions of speaker credibility …

Inst5280 - Blogs, Wikis, New Media For Learning, Spring 2006, David Wiley

Instructional Technology & Learning Sciences - OCW

Innovation continues to occur on the internet at an extremely lively pace. What was once the realm of email, FTP, Gopher, and the Web is barely recognizable a mere 10 years later. Keeping up with the speed of innovation and maintaining a familiarity with the most recent tools and capabilities is handy in some professions and absolutely critical in others. This course is designed to help you understand and effectively use a variety of "web 2.0" technologies including blogs, RSS, wikis, social bookmarking tools, photo sharing tools, mapping tools, audio and video podcasts, and screencasts.

Impacts Of The 2004 Tsunami On Groundwater In Sri Lanka, T. Illangasekare, S. W. Tyler, T. P. Clement, K. G. Villholth, A. P.G.R.L. Perera, J. Obeysekera, A. Gunatilaka, C. R. Panabokke, D. W. Hyndman, K. J. Cunningham, W-G. Yeh, Jagath J. Kaluarachchi, M-Rien Van Genuchten, K. Jensen

Civil and Environmental Engineering Faculty Publications

The 26 December 2004 tsunami caused widespread destruction and contamination of coastal aquifers across southern Asia. Seawater filled domestic open dug wells and also entered the aquifers via direct infiltration during the first flooding waves and later as ponded seawater infiltrated through the permeable sands that are typical of coastal aquifers. In Sri Lanka alone, it is estimated that over 40,000 drinking water wells were either destroyed or contaminated. From February through September 2005, a team of United States, Sri Lankan, and Danish water resource scientists and engineers surveyed the coastal groundwater resources of Sri Lanka to develop an understanding …

Treating Soil Pentachlorophenol (Pcp) At Optimal Conditions Using Heme And Peroxide, Shyi Tien Chen, David King Stevens, Guyoung Kang, M. J. Hsieh

Civil and Environmental Engineering Faculty Publications

The environmental impact of pentachlorophenol (PCP) has been the subject of extensive research in recent years. Investigations of PCP degradation using both biotic and abiotic methods are extensively reported in literature. Based on some preliminary tests (not shown), an abiotic method was found for oxidative PCP degradation in soil under unsaturated conditions and a neutral pH. Reagents used were heme (a catalyst) and peroxide (an oxidant). From two screening tests (not shown), the heme and peroxide were identified as the most important factors on PCP degradation in highly PCP-contaminated soil. The objective of this study was to determine the optimum …