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Modelling Large Scale Invasion Of New Species Under Temperature Change By Reaction-Diffusion Equations, O. Richter, Wenkui He Jul 2012

Modelling Large Scale Invasion Of New Species Under Temperature Change By Reaction-Diffusion Equations, O. Richter, Wenkui He

International Congress on Environmental Modelling and Software

Due to human migration and climate change invasion of alien species has been observed in Europe. Recently, the mosquito Aedes albopictus has invaded the south of France. The spatial-temporal dynamics of invasion is studied in dependence of temperature and predation pressure of the resident ecosystem. The main elements population dynamics, predation and dispersal are combined in a coherent approach based on a system of coupled reaction diffusion equations for the aquatic and winged phase. The nonlinear reaction terms comprise a population dynamic model with temperature dependent reproduction rates and a predation term. The effect of temperature and predation pressure on …

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Relative Importance Of Secondary Settling Tank Models In Wwtp Simulations – A Global Sensitivity Analysis Using Bsm2, Elham Ramin, Xavier Flores-Alsina, Gürkan Sin, Krist V. Gernaey, Ulf Jeppsson, Peter Steen Mikkelsen, Benedek Gy Plósz Jul 2012

Relative Importance Of Secondary Settling Tank Models In Wwtp Simulations – A Global Sensitivity Analysis Using Bsm2, Elham Ramin, Xavier Flores-Alsina, Gürkan Sin, Krist V. Gernaey, Ulf Jeppsson, Peter Steen Mikkelsen, Benedek Gy Plósz

International Congress on Environmental Modelling and Software

Results obtained in a study using the Benchmark Simulation Model No. 1 (BSM1) show that a one-dimensional secondary settling tank (1-D SST) model structure and its parameters are among the most significant sources of uncertainty in wastewater treatment plant (WWTP) simulations [Ramin et al., 2011]. The sensitivity results consistently indicate that the prediction of sludge production is most sensitive to the variation of the settling parameters. In the present study, we use the Benchmark Simulation Model No. 2 (BSM2), a plant-wide benchmark, that combines the Activated Sludge Model No. 1 (ASM1) with the Anaerobic Digestion Model No. 1 (ADM1). We …

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Weight-Of-Evidence-Based Assessment Of Sediment Quality Of The São Francisco River (Brazil) With The Help Of Software Tool Sqa, Alla Khosrovyan, Maria Jose Salamanca Marin, André Moldenhauer Peret, Débora Fernandes De Almeida, T. Angel Delvalls, Inmaculada Riba Jul 2012

Weight-Of-Evidence-Based Assessment Of Sediment Quality Of The São Francisco River (Brazil) With The Help Of Software Tool Sqa, Alla Khosrovyan, Maria Jose Salamanca Marin, André Moldenhauer Peret, Débora Fernandes De Almeida, T. Angel Delvalls, Inmaculada Riba

International Congress on Environmental Modelling and Software

Weight-of-evidence (WOE) approach is a requirement for comprehensive integrated sediment quality assessment and management worldwide. WOE is a system approach based on collection of several lines of evidences that are able to derive multi-aspect characterization of availability and adverse effects of contaminants for living organisms in water environments. A software tool addressing this approach is already available and based on the statistical package STATISTICA 6.0. The tool provided user-friendly and user-assisting interface for entering and analyzing of data, as well as presented a summary of the results of the conducted analysis. It was designed for environmental scientists and managers, academia …

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Web-Based Foss Environment Decision Support Systems For Odense River Basin In Denmark, Xuan Zhu, Ann Van Griensven, Yunqing Xuan, Arthur E. Mynett Jul 2012

Web-Based Foss Environment Decision Support Systems For Odense River Basin In Denmark, Xuan Zhu, Ann Van Griensven, Yunqing Xuan, Arthur E. Mynett

International Congress on Environmental Modelling and Software

Complicated model structure and time consuming simulations increase the use of models in decision making process when the stakeholders are not familiar with the tools. Therefore, the user interface (UI) design for decision support system (DSS) should not only maintain the scientific model structure but also simplify the interaction with models and the need for easy access. Nowadays, web-based techniques have been developed so fast and Web 2.0 brings the time when web-based systems challenge the desktop applications. This technology also needs to be taken into account in the DSS development for water resource management because the stakeholders are spatial …

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Impacts Of Climate Change On Water Availability And Crop Yield In Germany, Shaochun Huang, Valentina Krysanova, Fred Hattermann Jul 2012

Impacts Of Climate Change On Water Availability And Crop Yield In Germany, Shaochun Huang, Valentina Krysanova, Fred Hattermann

International Congress on Environmental Modelling and Software

Under a warmer climate, crop growth and crop yield could be affected by many factors (e.g. increasing temperatures, CO2 fertilization and lower water supply) either positively or negatively. The present study aims in a) projecting the future water availability and low flow conditions in the five largest river basins in Germany, b) investigating the impact of climate change and CO2 fertilization on crop yield, and c) studying the potential of having two yields (e.g. winter wheat – summer barley) per year under a warmer climate. The eco-hydrological model SWIM (Soil and Water Integrated Model) was driven by four regional climate …

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Species Distribution Modelling And Open Source Gis: Why Are They Still So Loosely Connected?, Anne Ghisla, Duccio Rocchini, Markus Neteler, Michael Forster, Birgit Kleinschmit Jul 2012

Species Distribution Modelling And Open Source Gis: Why Are They Still So Loosely Connected?, Anne Ghisla, Duccio Rocchini, Markus Neteler, Michael Forster, Birgit Kleinschmit

International Congress on Environmental Modelling and Software

Species Distribution Models (SDMs) are correlative models that use environmental and/or geographical information to explain patterns of species occurrences. Those models are being used in various fields including climate change, invasive species research, evolutionary biology and epidemiology. Thanks to the availability of increasing computational resources, new methods continue to be developed. However, software packages that include the SDM algorithms usually focus on one or few methods, and have different degrees of integration with other geographical and statistical software. Specifically, SDM implementations are often standalone programs developed by university laboratories, either as extensions to statistical software. In few cases they are …

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Semi-Automatic Delimitation Of Buffer Zones For Protected Areas: A Contribution From Species Distribution Modelling, Cuitlahuac Hernandez-Santiago, Martin Volk Jul 2012

Semi-Automatic Delimitation Of Buffer Zones For Protected Areas: A Contribution From Species Distribution Modelling, Cuitlahuac Hernandez-Santiago, Martin Volk

International Congress on Environmental Modelling and Software

Preservation of natural protected areas in Mexico requires human activities regulation in the Buffer Zones (Zona de Influencia). These zones have been defined conceptually by law and delineated spatially using physiographical and anthropogenic criteria. The presented study proposes a demarcation based on species distribution modeling as an ecological criterion to prioritize environmental requirements of protected species in “Laguna de Chacahua” National Park. To achieve this, a model in ArcGIS ModelBuilder was developed and applied for the delimitation of a buffer zone for the National Park. The proposed model involve a) obtaining data of 90 species (mammals, reptiles and amphibians) of …

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Particles In The Cloud – Running Gis-Based Particle Tracking Models For Fish Larval Dissemination In Traditional And Cloud Computing Architectures, Tiffany C. Vance, Kyle Wilcox Jul 2012

Particles In The Cloud – Running Gis-Based Particle Tracking Models For Fish Larval Dissemination In Traditional And Cloud Computing Architectures, Tiffany C. Vance, Kyle Wilcox

International Congress on Environmental Modelling and Software

Models provide a way to understand the complex interactions of biological and physical process. As an example, the movement of dust plumes generated on continents over the adjoining oceans can be modeled for both the physical process of particle transport and for the geochemical effects of the dust deposition on life in the oceans. Models can also describe and link two physical processes; a model can be used to simulate the complex 3-dimensional movement of ocean currents and these model results can be linked to models that predict the movement of many waterborne objects such as fish and larvae, oil …

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The Gsa-Glue Approach For Uncertainty Assessment Of An Integrated Mbr Model, A. Cosenza, G. Mannina, G. Viviani Jul 2012

The Gsa-Glue Approach For Uncertainty Assessment Of An Integrated Mbr Model, A. Cosenza, G. Mannina, G. Viviani

International Congress on Environmental Modelling and Software

In the recent literature, the uncertainty of wastewater treatment plant(WWTP) modelling has had relevant interest both for designers and operators.Indeed, the frequent data lacking and the need to improve process knowledge, incase of innovative technologies, make the use of mathematical models moreuncertain. Therefore, the need to make model uncertainty more explicit is warmlyrecommended. However, only few applications of uncertainty analysis in thewastewater field have been carried out. In this work, the combination of the globalsensitivity analysis (GSA) and the Generalized Likelihood Uncertainty Estimation(GLUE) is applied for the uncertainty assessment of a WWTP model, in order todiscuss and verify its applicability. …

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Post-Fire Soil Water Repellency: Extent, Severity And Thickness Relative To Ecological Site Characteristics Within Piñon-Juniper Woodlands, Daniel Lewis Zvirzdin Jun 2012

Post-Fire Soil Water Repellency: Extent, Severity And Thickness Relative To Ecological Site Characteristics Within Piñon-Juniper Woodlands, Daniel Lewis Zvirzdin

Theses and Dissertations

Erosion and weed dominance often limit the recovery of burned piñon-juniper woodlands. Soil water repellency (SWR) is one factor that may contribute to this by increasing overland flow and impeding seedling establishment. In spite of these effects, the extent of SWR within piñon-juniper woodlands is unknown. In this study, the extent, severity and thickness of SWR were sampled across 41 1,000 m2 plots within three 2009 Utah wildfires. Predictive models of SWR were built from ecological site characteristic data collected at each site. Across the study, SWR was found at 37% of the points sampled. SWR extent was strongly related …

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Xprime-Em: Eliciting Expert Prior Information For Motif Exploration Using The Expectation-Maximization Algorithm, Wei Zhou Jun 2012

Xprime-Em: Eliciting Expert Prior Information For Motif Exploration Using The Expectation-Maximization Algorithm, Wei Zhou

Theses and Dissertations

Understanding the possible mechanisms of gene transcription regulation is a primary challenge for current molecular biologists. Identifying transcription factor binding sites (TFBSs), also called DNA motifs, is an important step in understanding these mechanisms. Furthermore, many human diseases are attributed to mutations in TFBSs, which makes identifying those DNA motifs significant for disease treatment. Uncertainty and variations in specific nucleotides of TFBSs present difficulties for DNA motif searching. In this project, we present an algorithm, XPRIME-EM (Eliciting EXpert PRior Information for Motif Exploration using the Expectation-Maximization Algorithm), which can discover known and de novo (unknown) DNA motifs simultaneously from a …

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Multiple Molecule Effects On The Cooperativity Of Protein Folding Transitions In Simulations, Jacob I. Lewis, Devin J. Moss, Thomas A. Knotts Iv Jun 2012

Multiple Molecule Effects On The Cooperativity Of Protein Folding Transitions In Simulations, Jacob I. Lewis, Devin J. Moss, Thomas A. Knotts Iv

Faculty Publications

Though molecular simulation of proteins has made notable contributions to the study of protein folding and kinetics, disagreement between simulation and experiment still exists. One of the criticisms levied against simulation is its failure to reproduce cooperative protein folding transitions. This weakness has been attributed to many factors such as a lack of polarizability and adequate capturing of solvent effects. This work, however, investigates how increasing the number of proteins simulated simultaneously can affect the cooperativity of folding transitions — a topic that has received little attention previously. Two proteins are studied in this work: phage T4 lysozyme (Protein Data …

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Analysis And Design Tools For Structured Feedback Systems, Anurag Rai Jun 2012

Analysis And Design Tools For Structured Feedback Systems, Anurag Rai

Theses and Dissertations

As we begin to analyze and construct extremely complex systems, a theory for understanding and designing the underlying architecture becomes very important. To move in the direction of a precise theory of architecture, this thesis will provide some concrete tools to analyze and design complex systems with a given network structure. The first main result of this thesis analyzes the vulnerability of a system and shows that a system's vulnerability depends on its network structure. We will consider destabilization attacks acting on a single link in a system's logical interconnection structure. The concept of a vulnerable link is characterized and …

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The Putative Cannabinoid Receptor Gpr55 Modulates Synaptic Plasticity In The Hippocampus, Corinne Marie Badgley Jun 2012

The Putative Cannabinoid Receptor Gpr55 Modulates Synaptic Plasticity In The Hippocampus, Corinne Marie Badgley

Theses and Dissertations

Endocannabinoids (eCBs) are small molecules that are capable of modulating synaptic plasticity of both excitatory and inhibitory synapses in the brain. While eCBs bind to transient receptor potential vanilloid 1 (TRPV1) and cannabinoid receptor 1 (CB1) in the central nervous system, we recently identified a form of non-CB1, non-TRPV1 mediated long term depression activated by the eCB anandamide at CA1 hippocampal stratum radiatum interneurons. GPR55, an orphan G-protein receptor, has been identified in the hippocampus and is capable of activation by eCBs, making it a good candidate for mediating this non-CB1, non-TRPV1 form of synaptic plasticity. Here we performed whole-cell …

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Persistence And Foliation Theory And Their Application To Geometric Singular Perturbation, Ji Li Jun 2012

Persistence And Foliation Theory And Their Application To Geometric Singular Perturbation, Ji Li

Theses and Dissertations

Persistence problem of compact invariant manifold under random perturbation is considered in this dissertation. Under uniformly small random perturbation and the condition of normal hyperbolicity, the original invariant manifold persists and becomes a random invariant manifold. The random counterpart has random local stable and unstable manifolds. They could be invariantly foliated thanks to the normal hyperbolicity. Those underlie an extension of the geometric singular perturbation theory to the random case which means the slow manifold persists and becomes a random manifold so that the local global structure near the slow manifold persists under singular perturbation. A normal form for a …

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Mapping Creativity: An A/R/Tographic Look At The Artistic Process Of High School Students, Bart Andrus Francis Jun 2012

Mapping Creativity: An A/R/Tographic Look At The Artistic Process Of High School Students, Bart Andrus Francis

Theses and Dissertations

A high school visual art educator, along with 20 students enrolled in this teacher/researcher's Advanced Placement (AP) studio course, investigated the processes involved in creating artwork. Understanding artistic processes beyond skills and techniques is significant for curriculum development, but it is also key in conceptualizing art as a way of knowing. The arts based research strategy utilized in this study was a/r/tography, which focuses on the interconnectedness between artist, researcher, and teacher/learner. This highly reflective form of action research allowed the researcher and students to uncover new understandings of what it means to be an artist-researcher through a combination of …

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The Pro-Inflammatory Contributions Of Receptors For Advanced Glycation End-Products (Rage) In Alveolar Macrophages Following Cigarette Smoke Exposure, Adam Benjamin Robinson Jun 2012

The Pro-Inflammatory Contributions Of Receptors For Advanced Glycation End-Products (Rage) In Alveolar Macrophages Following Cigarette Smoke Exposure, Adam Benjamin Robinson

Theses and Dissertations

Receptors for advanced glycation end-products (RAGE) are multi-ligand cell surface receptors of the immunoglobin family expressed by epithelium and macrophages. RAGE expression increases following ligand binding and when diverse cells are exposed to a variety of insults including cigarette smoke extract (CSE). The current research sought to characterize the pro-inflammatory contributions of RAGE expressed by alveolar macrophages (AMs) following CSE exposure. Acute exposure of mice to CSE via nasal instillation revealed diminished bronchoalveolar lavage (BAL) cellularity and fewer AMs in RAGE null mice compared to controls. Primary AMs were obtained from BAL, exposed to CSE in vitro, and RNA, DNA, …

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Media Meets Science: The Experience Of A Media Teacher And Science Teacher As They Implement Media Literacy In A Science Classroom, Matthew Jay Brown Jun 2012

Media Meets Science: The Experience Of A Media Teacher And Science Teacher As They Implement Media Literacy In A Science Classroom, Matthew Jay Brown

Theses and Dissertations

This qualitative action research study looked at my collaboration with a science teacher as we combined a Television Production class with an Advanced Placement Environmental Science class. This cross-curricular case study explored the implementation of the principles of media literacy, defined by the National Association for Media Literacy Education, into the science classroom where media literacy has traditionally been a non-factor. The impact of media and technology on everyone's daily lives is making it necessary for us to become media literate. The use of media literacy tools and strategies in a combined media production class and an AP science class …

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The Development Of Two Units For Basic Training And Resources For Teaching English To Speakers Of Other Languages: "Content-Based Language Classes" And "Multiple Skills In One Class", Amanda Staten Malaman Jun 2012

The Development Of Two Units For Basic Training And Resources For Teaching English To Speakers Of Other Languages: "Content-Based Language Classes" And "Multiple Skills In One Class", Amanda Staten Malaman

Theses and Dissertations

Under the direction of Dr. Lynn Henrichsen, a group of students has developed numerous units for the Basic Training and Resources for Teaching English to Speakers of Other Languages (BTRTESOL) program. This program is currently located on a website and will someday be published in book and DVD format. These units provide general training for novice teachers who teach domestically or abroad. With little or no training, volunteer English language teachers are often left with questions that BTRTESOL strives to answer in its 52 units. As this audience may or may not have university education or heavy commitment, these units …

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The School-Based Family: Coaches And Teachers As Parental Figures For Orphans And Vulnerable Children In Ugandan Schools, Angela Warren Jun 2012

The School-Based Family: Coaches And Teachers As Parental Figures For Orphans And Vulnerable Children In Ugandan Schools, Angela Warren

Theses and Dissertations

The purpose of this study was to qualitatively examine the possible formation of surrogate families within Ugandan schools to provide a context for positive development experiences, especially for orphans who lack positive development opportunities provided by parents. The sample for this study consisted of 66 Ugandan Secondary School students from eight schools in the Mukono district of Uganda. This study found a potentially widespread family formation pattern between students and their teachers/coaches. More than 75% of students self-identified their teacher and/or coach as family. The results provide insight concerning why orphans and vulnerable children are forming surrogate families with staff …

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Greening The Market: The Development And Effect Of Environmental Terms On Consumer Perception Of Products, Jae Parker Heiner Jun 2012

Greening The Market: The Development And Effect Of Environmental Terms On Consumer Perception Of Products, Jae Parker Heiner

Theses and Dissertations

History, discourse analysis, and corpus linguistics show the green movement (humankind's response to issues affecting the environment) to have proliferated both ecological ideologies and the linguistic tools to discuss them, (R. J. Alexander, 2002; Bang, Døør, Steffensen, & Nash, 2007; Carvalho, 2007; Mahlberg, 2007; Wang, 2009) showing the development of green or environmental language in the lexicon. The topic has also left its mark on the market, and green market research has shown effects of messages on perceptions of green brands (Phau & Ong, 2007) and profiles of m (J. A. Roberts, 1996). However , surprisingly little research has been …

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Interracial, Yet Intrafaith: Does A Common Religion Predict Higher Relationship Quality In Interracial Romantic Relationships?, Danielle Fenn Jun 2012

Interracial, Yet Intrafaith: Does A Common Religion Predict Higher Relationship Quality In Interracial Romantic Relationships?, Danielle Fenn

Theses and Dissertations

The purpose of this study was to analyze the association between relationship quality and religious discrepancy of interracial couples who are either married or cohabiting. Two variables of religious discrepancy (religious affiliation discrepancy and religiosity discrepancy) were studied. The sample included three groups of interracial couples: Hispanic-white, Asian-white, and Black-white. The data were analyzed using a structural equation model and regression estimates of the three groups were compared. Results showed a significant relationship in only three of the 12 relationships between the two variables of religious discrepancy and relationship quality. Significant negative relationships were found between religious denomination discrepancy and …

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A Study In Computerized Translation Testing (Ctt) For The Arabic Language, Amanda J. Kuhn Jun 2012

A Study In Computerized Translation Testing (Ctt) For The Arabic Language, Amanda J. Kuhn

Theses and Dissertations

Translation quality assessment remains pertinent in both translation theory and in the industry. Specifically, the process of assessing a target document's quality or a person's translation competence involves a lot of time and money on the part of various governments, organizations and individuals. In response to this issue, this project builds on the ongoing research of Hague et al. (2012), who seek to determine the capabilities of a computerized translation test for the French-to-English and Spanish-to-English language pairs. Specifically, Hague et al. (2012) question whether a good score on a detect-and-correct style computerized translation test that is calculated by a …

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Open (Adoption) For Business: Opposing Movements And Environmental Opportunity Structures In The Adoption Organizational Field, 1972-2000, Krista Marie Frederico Jun 2012

Open (Adoption) For Business: Opposing Movements And Environmental Opportunity Structures In The Adoption Organizational Field, 1972-2000, Krista Marie Frederico

Theses and Dissertations

Recent directions in organizational studies have demonstrated progressive social movements' ability to generate rewarding enterprises or environmental opportunity structures (EOS) in receptive markets. However, more nuanced opposing movements (Meyer and Staggenborg 1996), such as the pro-choice and pro-life movements, receive far less attention, leaving scholars to postulate that there is much yet to know about the impact of movements other than those with strict progressive orientations (Zald, Morrill, and Rao 2005). To better understand how opposing movements contribute to environmental opportunity structures, this thesis examines dramatic growth in the number of adoption agencies advertising services in the Yellow Pages during …

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The Personal Characteristics And Pedgagogical Styles Of Effective Abstinence Education Instructors, Karen D. Hill Jun 2012

The Personal Characteristics And Pedgagogical Styles Of Effective Abstinence Education Instructors, Karen D. Hill

Theses and Dissertations

The purpose of this study was to explore the personal characteristics and pedagogical styles of effective abstinence instructors. Abstinence instructors receive regular training and evaluation and tend to remain in the abstinence education field for multiple years. Abstinence education programs are offered throughout the United States and present a pool of participants in which to sociologically examine the dynamics of the relationship of adolescents and instructors in a youth prevention program. This qualitative study is based on in-depth personal interviews of eight abstinence instructors who shared insights into their own teaching experiences, expressed their thoughts about who they are as …

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Amphibious Entrepreneurs And The Emergence Of Organizational Forms, Walter W. Powell, Kurt Sandholtz Jun 2012

Amphibious Entrepreneurs And The Emergence Of Organizational Forms, Walter W. Powell, Kurt Sandholtz

Faculty Publications

We study the emergence of organizational forms, focusing on two mechanisms—reconfiguration and transposition—that distinguish the founding models of the first 26 biotechnology companies, all created in the industry's first decade, from 1972 to 1981. We analyze rich archival data using hierarchical cluster analysis, revealing four organizational variants of the dedicated biotech firm (DBF). Three were products of reconfiguration, as executives from Big Pharma used past practices to incorporate new science. One DBF variant resulted from 'amphibious' scientists who imported organizing ideas from the academy into their VC-funded start-ups. We argue that such transpositions are fragile, yet charged with generative possibilities. …

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Rembrandt Van Rijn's Jewish Bride: Depicting Female Power In The Dutch Republic Through The Notion Of Nation Building, Nan T. Atwood Jun 2012

Rembrandt Van Rijn's Jewish Bride: Depicting Female Power In The Dutch Republic Through The Notion Of Nation Building, Nan T. Atwood

Theses and Dissertations

Many art historians have debated the identity of the couple in Rembrandt's the Jewish Bride (1667). The painting is most often identified as an Old Testament theme. This is due to the seventeenth-century Dutch practice of using biblical "types" as ideal models for the structuring of the new republic founded on the Israelite ideology of nation building. Three of these biblical female types that have been separately associated with the female figure in the Jewish Bride are, Rebecca, Ruth, and Esther. As these biblical women represented different notions of power through their respective narratives, this thesis argues that Rembrandt deliberately …

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Exposure To Dietary Selenium And Soy Isoflavones In Utero Provides Greater Protection Against Prostate Cancer Risk Factors In Tramp Mice Than Exposure Beginning At 6 Weeks, Heather Schofield Lindsay Jun 2012

Exposure To Dietary Selenium And Soy Isoflavones In Utero Provides Greater Protection Against Prostate Cancer Risk Factors In Tramp Mice Than Exposure Beginning At 6 Weeks, Heather Schofield Lindsay

Theses and Dissertations

Prostate cancer is the second most commonly occurring cancer in men in the United States. Generally, an extended period of time is needed for a mutation to develop into a full scale tumor. Because of this long latency period, lifestyle and environmental factors, such as diet, may play an important role in the development and progression of the disease. Diet is one factor that has been implicated in the risk for developing prostate cancer. We previously showed that diets high in soy isoflavones and selenium (Se) decreased androgen receptor expression and expression of androgen regulated genes in healthy rat prostates. …

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Effect Of Antioxidants And Oxidative Stress On Different Cancer Cell Types, Gaytri Devi Gupta Elera Jun 2012

Effect Of Antioxidants And Oxidative Stress On Different Cancer Cell Types, Gaytri Devi Gupta Elera

Theses and Dissertations

Vaccinium cyanococcus, most commonly known as blueberry, is a fruit native to North America that is known for its unique taste and high antioxidant content. The skin, seed and juice of both organically and conventionally grown blueberry extract were analyzed for antioxidant content using both the Hydrophilic and Lipophilic Oxygen Radical Absorbance Capacity (ORAC) assays. Results from the Hydrophilic ORAC test showed that conventionally grown blue berries had a higher antioxidant capacity across all samples, while the Lipophilic ORAC assay showed that the antioxidant concentration of organically cultivated blueberry juice was highest, but conventionally grown blueberry seed and skin …

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A Preliminary Examination Of The Cost Savings And Learning Impacts Of Using Open Textbooks In Middle And High School Science Classes, John Hilton Iii, David Wiley, Shelley Ellington, Tiffany Hall Jun 2012

A Preliminary Examination Of The Cost Savings And Learning Impacts Of Using Open Textbooks In Middle And High School Science Classes, John Hilton Iii, David Wiley, Shelley Ellington, Tiffany Hall

Faculty Publications

Proponents of open educational resources claim that significant cost savings are possible when open textbooks displace traditional textbooks in the classroom. Over a period of two years, we worked with 20 middle and high school science teachers (collectively teaching approximately 3,900 students) who adopted open textbooks to understand the process and determine the overall cost of such an adoption. The teachers deployed open textbooks in multiple ways. Some of these methods cost more than traditional textbooks; however, we did identify and implement a successful model of open textbook adoption that reduces costs by over 50% compared to the cost of …

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