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Problem-Based Learning In Mathematics, Thomas C. O'Brien, Chris Wallach, Carla Mash-Duncan 2011 University of Montana

Problem-Based Learning In Mathematics, Thomas C. O'Brien, Chris Wallach, Carla Mash-Duncan

The Mathematics Enthusiast

A teacher of mathematics has a great opportunity. If he fills his allotted time with drilling his students in routine operations, he kills their interest, hampers their intellectual development, and misuses his opportunity. But if he challenges the curiosity of his students by setting them problems proportionate to their knowledge and helps them to solve their problems with stimulating questions, he may give them a taste for, and some independent means of, independent thinking.


The Effects Of Invasion By Reed Canarygrass (Phalaris Arundinacea) On Avian Communities And Nesting Success In Minnesota Wetlands, Emily J. Hutchins 2011 Minnesota State University - Mankato

The Effects Of Invasion By Reed Canarygrass (Phalaris Arundinacea) On Avian Communities And Nesting Success In Minnesota Wetlands, Emily J. Hutchins

All Theses, Dissertations, and Other Capstone Projects

Invasive plants are a primary contributor to loss of biodiversity worldwide. In southern Minnesota, many wetlands have been invaded by reed canarygrass (Phalaris arundinacea). The current perception among ecologists and resource managers is that these wetlands are of little value to wildlife, yet little is known about the effects on birds of the widespread conversion of diverse wetlands to apparent monocultures of P. arundinacea. The purpose of this study was to determine the effects of P. arundinaceamediated changes in the wetland plant community on avian communities and nesting success. During 2006 and 2007, I studied four diverse sedge wetlands paired ...


Aerosol Climatology Over Nile Delta Based On Modis, Misr And Omi Satellite Data, H. S. Marey, J. C. Gille, Hesham el-Askary, E. A. Shalaby, Mohamed El Raey 2011 National Center for Atmospheric Research

Aerosol Climatology Over Nile Delta Based On Modis, Misr And Omi Satellite Data, H. S. Marey, J. C. Gille, Hesham El-Askary, E. A. Shalaby, Mohamed El Raey

Mathematics, Physics, and Computer Science Faculty Articles and Research

Since 1999 Cairo and the Nile delta region have suffered from air pollution episodes called the “black cloud” during the fall season. These have been attributed to either burning of agriculture waste or long-range transport of desert dust. Here we present a detailed analysis of the optical and microphysical aerosol properties, based on satellite data. Monthly mean values of Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD) at 550 nm were examined for the 10 yr period from 2000–2009. Significant monthly variability is observed in the AOD with maxima in April or May (_0.5) and October (_0 ...


A Web Based Fuzzy Data Mining Using Combs Inference Method And Decision Predictor, Shajia Akhter Sharmin 2011 Minnesota State University - Mankato

A Web Based Fuzzy Data Mining Using Combs Inference Method And Decision Predictor, Shajia Akhter Sharmin

All Theses, Dissertations, and Other Capstone Projects

Fuzzy logic has become a very popular method of reasoning a system with approximate input system instead of a precise one. When qualitative variables are used to determine the decisions then we have to create some specific functions where the membership values of the input can be any number between 0 to 1 instead of 1 or 0 which is used in binary logic. When number of input attribute increases it the combinatorial rules increases exponentially, and diminishes performance of the system. The problem is generally known as “combinatorial rule explosion”. The Information Technology Department of Minnesota State University, Mankato ...


Quaternionic Hermitian Spinor Systems And Compatibility Conditions, Alberto Damiano, David Eelbode, Irene Sabadini 2011 Chapman University

Quaternionic Hermitian Spinor Systems And Compatibility Conditions, Alberto Damiano, David Eelbode, Irene Sabadini

Mathematics, Physics, and Computer Science Faculty Articles and Research

In this paper we show that the systems introduced in [12] and [22] are equivalent, both giving the notion of quaternionic Hermitian monogenic functions. This makes it possible to prove that the free resolution associated to the system is linear in any dimension, and that the first cohomology module is nontrivial, thus generalizing the results in [22]. Furthermore, exploiting the decomposition of the spinor space into sp(m)-irreducibles, we find a certain number of "algebraic" compatibility conditions for the system, suggesting that the usual spinor reduction is not applicable.


Ultra-Diffuse Hydrothermal Venting Supports Fe-Oxidizing Bacteria And Massive Umber Deposition At 5000 M Off Hawaii, Katrina J. Edwards, B. T. Glazer, Olivier J. Rouxel, Wolfgang Bach, D. Emerson, Russ E. Davis, Brandy M. Toner, C. S. Chan, B. M. Tebo, Hubert Staudigel, Craig L. Moyer 2011 Western Washington University

Ultra-Diffuse Hydrothermal Venting Supports Fe-Oxidizing Bacteria And Massive Umber Deposition At 5000 M Off Hawaii, Katrina J. Edwards, B. T. Glazer, Olivier J. Rouxel, Wolfgang Bach, D. Emerson, Russ E. Davis, Brandy M. Toner, C. S. Chan, B. M. Tebo, Hubert Staudigel, Craig L. Moyer

Biology Faculty and Staff Publications

A novel hydrothermal field has been discovered at the base of Lōihi Seamount, Hawaii, at 5000 mbsl. Geochemical analyses demonstrate that ‘FeMO Deep’, while only 0.2 °C above ambient seawater temperature, derives from a distal, ultra-diffuse hydrothermal source. FeMO Deep is expressed as regional seafloor seepage of gelatinous iron- and silica-rich deposits, pooling between and over basalt pillows, in places over a meter thick. The system is capped by mm to cm thick hydrothermally derived iron-oxyhydroxide- and manganese-oxide-layered crusts. We use molecular analyses (16S rDNA-based) of extant communities combined with fluorescent in situ hybridizations to demonstrate that FeMO Deep ...


3-D Computational Investigation Of Viscoelastic Biofilms Using Gpus, Paisa Seeluangsawat 2011 University of South Carolina - Columbia

3-D Computational Investigation Of Viscoelastic Biofilms Using Gpus, Paisa Seeluangsawat

Theses and Dissertations

A biofilm is a slimy colony of bacteria and the materials they secrete, collectively called “extracellular polymeric substances (EPS)”. The EPS consists mostly of bio-polymers, which cross link into a network that behave viscoelastically under deformation. We propose a single-fluid multi-component phase field model of biofilms that captures this behavior, then use numerical simulations on GPUs to investigate the biofilm’s growth and its hydrodynamics properties.


The Importance Of Hydrogen Bonds In Dna, Ashley McEntire 2011 Park College

The Importance Of Hydrogen Bonds In Dna, Ashley Mcentire

Natural Sciences Poster Sessions

No abstract provided.


The Chemistry Behind Beer, Anna Coates 2011 Parkland College

The Chemistry Behind Beer, Anna Coates

Natural Sciences Poster Sessions

No abstract provided.


Xylitol Vs. Aspartame, Melika Fini 2011 Parkland College

Xylitol Vs. Aspartame, Melika Fini

Natural Sciences Poster Sessions

No abstract provided.


Why Do Onions Make You Cry?, Richard Sumitro 2011 Parkland College

Why Do Onions Make You Cry?, Richard Sumitro

Natural Sciences Poster Sessions

No abstract provided.


Excipient Effects On Humanized Monoclonal Antibody Interactions With Silicone Oil Emulsion, Keith A. Britt 2011 University of Colorado at Boulder

Excipient Effects On Humanized Monoclonal Antibody Interactions With Silicone Oil Emulsion, Keith A. Britt

Chemical & Biological Engineering Graduate Theses & Dissertations

Silicone oil is a lubricant used for plunger depression in prefilled glass syringes. Many therapeutic protein products are stored in prefilled syringes and may be exposed to the silicone oil-water interface for up to 18-24 months. At the present, our understanding of how proteins interact with this interface remains poorly understood. In this work, the interaction of three humanized monoclonal antibodies (humAbs) with silicone oil emulsion was assessed in presence of sodium chloride, sucrose, Tween® 20, Tween® 80, and poloxamer 188. It was found that the amount of humAb adsorbed was antibody- and excipient-dependent. Once adsorbed, the tryptophan exposure to ...


Investigating Intrinsic And Extrinsic Variables During Simulated Internet Search, Molly M. Liechty, Poornima Madhaven 2011 Old Dominion University

Investigating Intrinsic And Extrinsic Variables During Simulated Internet Search, Molly M. Liechty, Poornima Madhaven

Psychology Faculty Publications

Using an eye tracker we examined decision-making processes during an internet search task. Twenty experienced homebuyers and twenty-five undergraduates from Old Dominion University viewed homes on a simulated real estate website. Several of the homes included physical properties that had the potential to negatively impact individual perceptions. These negative externalities were either easy to change (Level 1) or impossible to change (Level 2). Eye movements were analyzed to examine the relationship between participants' "stated preferences"[verbalized preferences], "revealed preferences" [actual decisions[, and experience. Dwell times, fixation durations/counts, and saccade counts/amplitudes were analyzed. Results revealed that experienced homebuyers demonstrated ...


Ice Rafts Not Sails: Floating The Rocks At Racetrack Playa, Ralph D. Lorenz, Brian K. Jackson, Jason W. Barnes, Joe Spitale, John M. Keller 2011 Johns Hopkins University

Ice Rafts Not Sails: Floating The Rocks At Racetrack Playa, Ralph D. Lorenz, Brian K. Jackson, Jason W. Barnes, Joe Spitale, John M. Keller

Brian Jackson

We suggest that the existence of many of the rock-carved trails at Racetrack Playa in Death Valley National Park is predominantly due to the effect of arbitrarily weak winds on rocks that are floated off the soft bed by small rafts of ice, as also occurs in arctic tidal beaches to form boulder barricades. These ice cakes need not have a particularly large surface area if the ice is adequately thick—the ice cakes allow the rocks to move by buoyantly reducing the reaction and friction forces at the bed, not by increasing the wind drag. The parameter space of ...


Electronic Transport Properties Of Ruthenium And Ruthenium Dioxide Thin Films, Michael M. Steeves 2011 The University of Maine

Electronic Transport Properties Of Ruthenium And Ruthenium Dioxide Thin Films, Michael M. Steeves

Electronic Theses and Dissertations

Resistivities (ρ) and Hall coefficients (RH) of polycrystalline Ru and RuO2 thin films were measured from 293 to 600 K in vacuum, O2, and CO. Differing nanostructures and textures were sputtered at normal, confocal, and glancing incidences to 20 - 300 nm thickness. For Ru in planar or nanorod morphologies, defects have negligible effect on RH, which is similar to RH in bulk metal. Models of effective thickness are derived for the nanorod morphology. For Ru and RuO2 films, decreases in ρ on first heating are caused by defect annealing; subsequent heating shows metallic behavior ...


Late-Pleistocene Glacial And Climate Fluctuations In The Torres Del Paine Region (51ºs), Southern South America, Juan Luis Garcia 2011 The University of Maine

Late-Pleistocene Glacial And Climate Fluctuations In The Torres Del Paine Region (51ºs), Southern South America, Juan Luis Garcia

Electronic Theses and Dissertations

Variations in Earth‘s orbital parameters affect insolation and are thought to drive ice-age cycles (Milankovitch Theory). Northern and southern mid-latitudes show opposing insolation signals, because of the effect of precession. Despite this difference, paleoclimate records from both hemispheres display broadly synchronous glacialinterglacial climate changes tied to northern hemisphere insolation. This would imply that southern hemisphere glaciers advanced in the face of increasing local summer insolation during the last glacial maximum and thus raises questions about the orbital theory of ice ages. Well-dated paleoclimate records are important for testing hypotheses concerning the origin of ice ages, particularly in the southern ...


Mixed-Source Reintroductions Lead To Outbreeding Depression In Second-Generation Descendents Of A Native North American Fish, David D. Huff, Loren M. Miller, Christopher J. Chizinski, Bruce Vondracek 2011 University of Minnesota

Mixed-Source Reintroductions Lead To Outbreeding Depression In Second-Generation Descendents Of A Native North American Fish, David D. Huff, Loren M. Miller, Christopher J. Chizinski, Bruce Vondracek

Nebraska Cooperative Fish & Wildlife Research Unit -- Staff Publications

Reintroductions are commonly employed to preserve intraspecific biodiversity in fragmented landscapes. However, reintroduced populations are frequently smaller and more geographically isolated than native populations. Mixing genetically, divergent sources are often proposed to attenuate potentially low genetic diversity in reintroduced populations that may result from small effective population sizes. However, a possible negative tradeoff for mixing sources is outbreeding depression in hybrid offspring. We examined the consequences of mixed-source reintroductions on several fitness surrogates at nine slimy sculpin (Cottus cognatus) reintroduction sites in south-east Minnesota. We inferred the relative fitness of each crosstype in the reintroduced populations by comparing their growth ...


Improving Our Legacy: Incorporation Of Adaptive Management Into State Wildlife Action Plans, Joseph J. Fontaine 2011 University of Nebraska-Lincoln

Improving Our Legacy: Incorporation Of Adaptive Management Into State Wildlife Action Plans, Joseph J. Fontaine

Nebraska Cooperative Fish & Wildlife Research Unit -- Staff Publications

The loss of biodiversity is a mounting concern, but despite numerous attempts there are few large scale conservation efforts that have proven successful in reversing current declines. Given the challenge of biodiversity conservation, there is a need to develop strategic conservation plans that address species declines even with the inherent uncertainty in managing multiple species in complex environments. In 2002, the State Wildlife Grant program was initiated to fulfill this need, and while not explicitly outlined by Congress follows the fundamental premise of adaptive management, ‘Learning by doing’. When action is necessary, but basic biological information and an understanding of ...


Luring Anglers To Enhance Fisheries, D. R. Martin, Kevin L. Pope 2011 University of Nebraska-Lincoln

Luring Anglers To Enhance Fisheries, D. R. Martin, Kevin L. Pope

Nebraska Cooperative Fish & Wildlife Research Unit -- Staff Publications

Current fisheries management is, unfortunately, reactive rather than proactive to changes in fishery characteristics. Furthermore, anglers do not act independently on waterbodies, and thus, fisheries are complex socio-ecological systems. Proactive management of these complex systems necessitates an approachdadaptive fisheries managementdthat allows learning to occur simultaneously with management. A promising area for implementation of adaptive fisheries management is the study of luring anglers to or from specific waterbodies to meet management goals. Purposeful manipulation of anglers, and its associated field of study, is nonexistent in past management. Evaluation of different management practices (i.e., hypotheses) through an iterative adaptive management process ...


Multimodel Inference And Adaptive Management, Sarah E. Rehme, Larkin A. Powell, Craig R. Allen 2011 University of Nebraska-Lincoln

Multimodel Inference And Adaptive Management, Sarah E. Rehme, Larkin A. Powell, Craig R. Allen

Nebraska Cooperative Fish & Wildlife Research Unit -- Staff Publications

Ecology is an inherently complex science coping with correlated variables, nonlinear interactions and multiple scales of pattern and process, making it difficult for experiments to result in clear, strong inference. Natural resource managers, policy makers, and stakeholders rely on science to provide timely and accurate management recommendations. However, the time necessary to untangle the complexities of interactions within ecosystems is often far greater than the time available to make management decisions. One method of coping with this problem is multimodel inference. Multimodel inference assesses uncertainty by calculating likelihoods among multiple competing hypotheses, but multimodel inference results are often equivocal. Despite ...


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