Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Purdue University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 3211 - 3240 of 8614

Full-Text Articles in Entire DC Network

Understanding Co-Teaching And Related Self-Efficacy Change In Student Teachers Who Co-Teach, Krista Zartman Jan 2015

Understanding Co-Teaching And Related Self-Efficacy Change In Student Teachers Who Co-Teach, Krista Zartman

Open Access Dissertations

This study’s purpose was twofold. First, I sought to understand and document the experience of co-teaching as a student teacher as it is currently being conducted by universities in the State of Indiana. Secondly, I desired to understand how the documented experiences impact a pre-service student teacher’s developing sense of self-efficacy related to teaching. Therefore, this work presents the results of a mixed-methods study addressing the research questions:

Go to article

A Comparison Of First-Semester Organic Chemistry Students’ Experiences And Mastery Of Curved-Arrow Formalism In Face-To-Face And Cyber Peer-Led Team Learning, Sarah Beth Wilson Jan 2015

A Comparison Of First-Semester Organic Chemistry Students’ Experiences And Mastery Of Curved-Arrow Formalism In Face-To-Face And Cyber Peer-Led Team Learning, Sarah Beth Wilson

Open Access Dissertations

The cyber Peer-Led Team Learning (cPLTL) workshops are a synchronous online adaptation of the educational intervention PLTL, in which students, under the guidance of undergraduate peer facilitators, collaboratively solve problems in small groups. The purpose of this parallel convergent mixed methods study was to assess the impact of implementing cPLTL in an organic chemistry course on students’ workshop experiences, performance, and development of curved arrow formalism skills. Statistical analyses revealed comparable attendance rates, distribution of course grades, and achievement on American Chemical Society First-semester Organic Chemistry Exams. However, plotting workshop grades by AB, C, and DFW grade groupings revealed that …

Go to article

Cultivating Multicultural Education In Islamic Schools In The U.S: Teachers' Perspectives About Diversity In Islamic Schools, Kadriye El-Atwani Jan 2015

Cultivating Multicultural Education In Islamic Schools In The U.S: Teachers' Perspectives About Diversity In Islamic Schools, Kadriye El-Atwani

Open Access Dissertations

The purpose of this study was to examine the perspectives of six teachers who have taught in Islamic schools in the U.S. to comprehend the general context of multicultural education in Islamic schools. This study was designed as a descriptive collective case study primarily to investigate how racial, class, national, language and gender diversity were observed in six different Islamic schools’ climates and classrooms. Designing this research as a collective case study fostered the exploration of various social dynamics among Muslim communities in the U.S., and exemplified different characteristics of Muslim communities through the six cases. Key findings and analyses …

Go to article

Human-Centered Environmentally Conscious Product Redesign Methods, William Zev Bernstein Jan 2015

Human-Centered Environmentally Conscious Product Redesign Methods, William Zev Bernstein

Open Access Dissertations

With future environmental regulations imminent in the United States, manufacturing companies are faced with the need to optimize existing product systems for environmental efficiency without compromising their performance, quality and deployment. To meet this need, computer-supported design tools must be extended to allow for identifying, indexing, and delivering lifecycle knowledge to users at various organizational levels and roles, e.g. managers, assemblers, and suppliers. The challenges associated with such an undertaking lie within the complex nature of lifecycle data, which carries with it spatial-temporal dependencies from multiple sources in an unstructured form. Just as lifecycle data resides in ``silos'' based on …

Go to article

Phase Field Modeling Of Grain Growth In Porous Polycrystalline Solids, Karim Ahmed Jan 2015

Phase Field Modeling Of Grain Growth In Porous Polycrystalline Solids, Karim Ahmed

Open Access Dissertations

The concurrent evolution of grain size and porosity in porous polycrystalline solids is a technically important problem. All the physical properties of such materials depend strongly on pore fraction and pore and grain sizes and distributions. Theoretical models for the pore-grain boundary interactions during grain growth usually employ restrictive, unrealistic assumptions on the pore and grain shapes and motions to render the problem tractable. However, these assumptions limit the models to be only of qualitative nature and hence cannot be used for predictions. This has motivated us to develop a novel phase field model to investigate the process of grain …

Go to article

Creation And Validation Of The Critical Thinking About Sustainability Scale, Vivian Gregory Alexander Jan 2015

Creation And Validation Of The Critical Thinking About Sustainability Scale, Vivian Gregory Alexander

Open Access Dissertations

Alexander, Vivian G. Ph.D., Purdue University, December 2015. Creation and Validation of the Critical Thinking about Sustainability Scale. Major Professor: Yukiko Maeda.

Go to article

Tracking Plant Virus Infections Through Multiple Dimensions: A Search For Sources Of Nonpersistent Virus Vectors And Reservoirs At Local And Regional Scales, Gina Marie Angelella Jan 2015

Tracking Plant Virus Infections Through Multiple Dimensions: A Search For Sources Of Nonpersistent Virus Vectors And Reservoirs At Local And Regional Scales, Gina Marie Angelella

Open Access Dissertations

My dissertation explores the ecology of aphid-vectored viruses in Midwestern cucurbits; in particular, it focuses on identifying source populations of vectors and virus reservoirs within fields and interactions of vector aphids with land cover surrounding and within fields. Initially, I identified the most commonly occurring viruses and aphid species associated with virus infections in pumpkin fields located across Indiana. This was done by assaying cucurbit leaf tissue with multiplex-rt-PCR targeting all four aphid-vectored, nonpersistent viruses found in cucurbits (papaya ringspot virus type-W, watermelon mosaic virus type-2, zucchini yellow mosaic virus, cucumber mosaic virus) and concurrently monitoring aphid species alightment in …

Go to article

Multimedia Learning For Increasing Knowledge On Energy Efficiency And Promotion Of Proenvironmental Behavior: A Study Of Undergraduate Students In Costa Rica, Yoselyn Walsh Jan 2015

Multimedia Learning For Increasing Knowledge On Energy Efficiency And Promotion Of Proenvironmental Behavior: A Study Of Undergraduate Students In Costa Rica, Yoselyn Walsh

Open Access Theses

Promotion of energy efficiency practices among household has been employed in many interventions with a varying degree of success, mainly on developed countries. The purpose of the study is to promote and measure knowledge of proenvironmental behavior in undergraduate students in the Costa Rica Institute of Technology. The intervention used for this purpose provided personal and altruistic information about the impact of energy consumption activities in household. People’s perceptions and attitudes about behaviors that contribute and mitigate climate change were also investigated. Participants were students from undergraduate programs who are also inhabitants of the residence hall provided by the institution. …

Go to article

First In The Family: A Comparison Of First-Generation And Non-First-Generation Engineering College Students, Dina Verdin, Allison F. Godwin Jan 2015

First In The Family: A Comparison Of First-Generation And Non-First-Generation Engineering College Students, Dina Verdin, Allison F. Godwin

School of Engineering Education Graduate Student Series

This study investigates first-generation and non-first-generation engineering undergraduates’ math/science identities, subject-related interests, and career plans. First-generation students are an understudied, but growing population. Understanding how these self-beliefs and background factors affect students’ engineering choice can help widen pathways into engineering which continues to be defined as “pale and male.” Additionally, identity has predictive value for practical outcomes like engineering choice in college. The data for this study comes from the nationally representative Sustainability and Gender in Engineering (SaGE) survey completed by 6,772 college students who enrolled in first-year English courses at 2- and 4-year colleges across the U.S. …

Go to article

The Antitumorigenic Function Of Egfr In Metastatic Breast Cancer Is Regulated By Expression Of Mig6, Michael Wendt, Whitney K. Williams, Pete E. Pascuzzi, Nikolas G. Balanis, Barbara J. Schiemann, Cathleen R. Carlin, William P. Schiemann Jan 2015

The Antitumorigenic Function Of Egfr In Metastatic Breast Cancer Is Regulated By Expression Of Mig6, Michael Wendt, Whitney K. Williams, Pete E. Pascuzzi, Nikolas G. Balanis, Barbara J. Schiemann, Cathleen R. Carlin, William P. Schiemann

Borch Department of Medicinal Chemistry and Molecular Pharmacology Faculty Publications

Numerous studies by our lab and others demonstrate that epidermal growth factor receptor (EGFR) plays critical roles in primary breast cancer (BC) initiation, growth and dissemination. However, clinical trials targeting EGFR function in BC have lead to disappointing results. In the current study we sought to identify the mechanisms responsible for this disparity by investigating the function of EGFR across the continuum of the metastatic cascade. We previously established that overexpression of EGFR is sufficient for formation of in situ primary tumors by otherwise nontransformed murine mammary gland cells. Induction of epithelial-mesenchymal transition (EMT) is sufficient to drive the metastasis …

Go to article

Qualitative Study Of First-Generation Latinas: Understanding Motivation For Choosing And Persisting In Engineering, Dina Verdin, Allison F. Godwin, Jennifer Morazes Jan 2015

Qualitative Study Of First-Generation Latinas: Understanding Motivation For Choosing And Persisting In Engineering, Dina Verdin, Allison F. Godwin, Jennifer Morazes

School of Engineering Education Graduate Student Series

Latina undergraduates pursuing an engineering degree continue to be an underrepresented group at four-year universities. Compared to their male counterparts, fewer women enter the field of engineering; however, of those Latino/as who do matriculate, they have the same likelihood of persisting as their White counterparts. Furthermore, a dearth of underrepresented students such as Latino/as and first-generation college students enter or remain in the field of engineering. The need for increased gender and racial/ethnic representation in engineering is a documented need allowing for the production of a wider range of innovative products that take into consideration different perspectives that represent the …

Go to article

Segregating The Effects Of Seed Traits And Common Ancestry Of Hardwood Trees On Eastern Gray Squirrel Foraging Decisions, Mekala Sundaram, Janna R. Willoughby, Nathanael Issac Lichti, Michael A. Steele, Robert K. Swihart Jan 2015

Segregating The Effects Of Seed Traits And Common Ancestry Of Hardwood Trees On Eastern Gray Squirrel Foraging Decisions, Mekala Sundaram, Janna R. Willoughby, Nathanael Issac Lichti, Michael A. Steele, Robert K. Swihart

Department of Forestry & Natural Resources Faculty Publications

The evolution of specific seed traits in scatter-hoarded tree species often has been attributed to granivore foraging behavior. However, the degree to which foraging investments and seed traits correlate with phylogenetic relationships among trees remains unexplored. We presented seeds of 23 different hardwood tree species (families Betulaceae, Fagaceae, Juglandaceae) to eastern gray squirrels (Sciurus carolinensis), and measured the time and distance travelled by squirrels that consumed or cached each seed. We estimated 11 physical and chemical seed traits for each species, and the phylogenetic relationships between the 23 hardwood trees. Variance partitioning revealed that considerable variation in foraging investment was …

Go to article

Steady-State Heat Transport: Ballistic-To-Diffusive With Fourier's Law, Jesse Maassen, Mark S. Lundstrom Jan 2015

Steady-State Heat Transport: Ballistic-To-Diffusive With Fourier's Law, Jesse Maassen, Mark S. Lundstrom

Department of Electrical and Computer Engineering Faculty Publications

It is generally understood that Fourier's law does not describe ballistic phonon transport, which is important when the length of a material is similar to the phonon mean-free-path. Using an approach adapted from electron transport, we demonstrate that Fourier's law and the heat equation do capture ballistic effects, including temperature jumps at ideal contacts, and are thus applicable on all length scales. Local thermal equilibrium is not assumed, because allowing the phonon distribution to be out-of-equilibrium is important for ballistic and quasi-ballistic transport. The key to including the non-equilibrium nature of the phonon population is to apply the proper boundary …

Go to article

Computational Electronics For The 21st Century: Reflections On The Past, Present, And Future, Mark S. Lundstrom Jan 2015

Computational Electronics For The 21st Century: Reflections On The Past, Present, And Future, Mark S. Lundstrom

Department of Electrical and Computer Engineering Faculty Publications

The author’s career has coincided with the development of numerical simulation into an essential component of semiconductor device technology research and development. We now have a sophisticated suite of simulation capabilities along with new challenges for 21st Century electronics. This talk presents a short history of the field and a description of the current state of the art, but it concentrates on lessons learned and thoughts about how computational electronics can continue to contribute effectively to the development of new electronic device technologies. The author will argue that electronics is changing, and that computational electronics can play a key role …

Go to article

Mass Media And The Contagion Of Fear: The Case Of Ebola In America, Sherry M J Towers, Shehzad Afzal, Gilbert Bernal, Nadya T. Bliss, Baltazar Espinoza, Jasmine Jackson, Julia Judson-Garcia, Maryam Khan, Michael Lin, Robert Mamada, Victor M. Moreno, Fereshteh Nazari, Kamaldeen Okumeye, Mary L. Ross, Claudia Rodriguez, Jan Medlock, David S. Ebert, Carlos Castillo-Chavez, Jan 2015

Mass Media And The Contagion Of Fear: The Case Of Ebola In America, Sherry M J Towers, Shehzad Afzal, Gilbert Bernal, Nadya T. Bliss, Baltazar Espinoza, Jasmine Jackson, Julia Judson-Garcia, Maryam Khan, Michael Lin, Robert Mamada, Victor M. Moreno, Fereshteh Nazari, Kamaldeen Okumeye, Mary L. Ross, Claudia Rodriguez, Jan Medlock, David S. Ebert, Carlos Castillo-Chavez,

Department of Electrical and Computer Engineering Faculty Publications

Background: In the weeks following the first imported case of Ebola in the U. S. on September 29, 2014, coverage of the very limited outbreak dominated the news media, in a manner quite disproportionate to the actual threat to national public health; by the end of October, 2014, there were only four laboratory confirmed cases of Ebola in the entire nation. Public interest in these events was high, as reflected in the millions of Ebola-related Internet searches and tweets performed in the month following the first confirmed case. Use of trending Internet searches and tweets has been proposed in the …

Go to article

An Explicit Conditioning Method For Image Reconstruction In Electrical Capacitance Tomography, S. H. Taylor, S V. Garimella Jan 2015

An Explicit Conditioning Method For Image Reconstruction In Electrical Capacitance Tomography, S. H. Taylor, S V. Garimella

CTRC Research Publications

A new electrical capacitance tomography (ECT) image reconstruction method, termed Sensitivity Factor Regularization (SFR), is developed. The SFR method provides an explicit formulation for solving the image reconstruction problem that performs better than other explicit methods, such as linear back-projection and Tikhonov regularization, while providing the same computational efficiency. The computational ease of the SFR method renders it an attractive option for ECT where real-time imaging is required and theoretical statistical evaluation of proposed electrode configurations may readily be performed. A statistical study is conducted using SFR image reconstructions for investigating the impact of electrode density on image quality for …

Go to article

Numerical Investigation Of Pressure Drop And Heat Transfer Through Reconstructed Metal Foams And Comparison Against Experiments, A. Diani, K. K. Bodla, L. Rosetto, S V. Garimella Jan 2015

Numerical Investigation Of Pressure Drop And Heat Transfer Through Reconstructed Metal Foams And Comparison Against Experiments, A. Diani, K. K. Bodla, L. Rosetto, S V. Garimella

CTRC Research Publications

Direct numerical simulation of transport in foam materials can benefit from realistic representations of the porous-medium geometry generated by employing non-destructive 3D imaging techniques. X-ray microtomography employs computer-processed X-rays to produce tomographic images or slices of specific regions of the object under investigation, and is ideally suited for imaging opaque and intricate porous media. In this work, we employ micro-CT for numerical analysis of air flow and convection through four different high-porosity copper foams. All four foam samples exhibit approximately the same relative density (6.4% - 6.6% solid volume fraction), but have different pore densities (5, 10, 20, and 40 …

Go to article

The Origin Of Korotkoff Sounds And The Accuracy Of Auscultatory Blood Pressure Measurements, Charles F. Babbs Jan 2015

The Origin Of Korotkoff Sounds And The Accuracy Of Auscultatory Blood Pressure Measurements, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Publications

This study explores the hypothesis that the sharper, high frequency Korotkoff sounds come from resonant motion of the arterial wall, which begins after the artery transitions from a buckled state to an expanding state. The motion of one mass, two nonlinear springs, and one damper, driven by transmural pressure under the cuff, are used to model and compute the Korotkoff sounds according to principles of classical Newtonian physics. The natural resonance of this spring-mass-damper system provides a concise, yet rigorous, explanation for the origin of Korotkoff sounds. Fundamentally, wall stretching in expansion requires more force than wall bending in buckling. …

Go to article

On The Origin Of Protein Superfamilies And Superfolds, Abram Magner, Wojciech Szpankowski, Daisuke Kihara Jan 2015

On The Origin Of Protein Superfamilies And Superfolds, Abram Magner, Wojciech Szpankowski, Daisuke Kihara

Department of Biological Sciences Faculty Publications

Distributions of protein families and folds in genomes are highly skewed, having a small number of prevalent superfamiles/superfolds and a large number of families/folds of a small size. Why are the distributions of protein families and folds skewed? Why are there only a limited number of protein families? Here, we employ an information theoretic approach to investigate the protein sequence-structure relationship that leads to the skewed distributions. We consider that protein sequences and folds constitute an information theoretic channel and computed the most efficient distribution of sequences that code all protein folds. The identified distributions of sequences and folds are …

Go to article

Intersection Of Art And Science, Petronio Bendito, Tim Korb Jan 2015

Intersection Of Art And Science, Petronio Bendito, Tim Korb

Lawson Building Exhibitions on the Intersection of Art and Science

The Intersection of Art and Science exhibition is an interdisciplinary educational project that examines a wide range of expressive approaches explored by international artists working at the intersection of art, mathematics, computer science, and technology. It is a joint collaboration between the Department of Computer Science and the Patti and Rusty Rueff School of Visual and Performing Arts at Purdue University. Featured artists: Sergio Albiac, Anne Burns, Conan Chadbourne, Hans Dehlinger, Brian Evans, Richard Hassell, Patrick Bingham-Hall, John Arden Hiigli, So Yoon Lym, Gabriel Meyer, and Robert M. Spann. The exhibition was curated by Dr. Petronio Bendito and Dr. Tim …

Go to article

Natural Resources / Graduate Students / Wright & Andrews / Cornell University / 2013, Sarah J. Wright, Camille Andrews Jan 2015

Natural Resources / Graduate Students / Wright & Andrews / Cornell University / 2013, Sarah J. Wright, Camille Andrews

Data Information Literacy Case Study Directory

This case study describes a 6 week for credit Data Information Literacy course taught at Cornell University for students in Natural Resources. Subject covered include: data management, data organization, data analysis and visualization, data sharing, and data quality and documentation. Materials include a book chapter describing the case study, a rubric for developing a data management plan, a class exercise in finding and evaluating data repositories, and the evaluation form used for the course.

Go to article

Civil Engineering/ Graduate Students/ Johnston & Jeffryes/ University Of Minnesota/ 2012, Lisa Johnston, Jon Jeffryes Jan 2015

Civil Engineering/ Graduate Students/ Johnston & Jeffryes/ University Of Minnesota/ 2012, Lisa Johnston, Jon Jeffryes

Data Information Literacy Case Study Directory

From the University of Minnesota, this case study describes the seven modules that comprise their data information literacy program for students in Civil Engineering. The modules include: data management, organization and documentation, data access and ownership, data sharing and re-use, and preservation. Materials include a book chapter describing the case study, the syllabus for the program, a template for developing a data management plan and the evaluation forms that were used.

Go to article

Applying Hierarchical Task Analysis Method To Discovery Layer Evaluation, Marlen Promann, Tao Zhang Jan 2015

Applying Hierarchical Task Analysis Method To Discovery Layer Evaluation, Marlen Promann, Tao Zhang

Libraries Faculty and Staff Scholarship and Research

While usability tests have been helpful in evaluating the success or failure of implementing discovery layers in the library context, the focus of usability tests has remained on the search interface rather than the discovery process for users. The informal site-­‐ and context specific usability tests have offered little to test the rigor of the discovery layers against the user goals, motivations and workflow they have been designed to support. This study proposes hierarchical task analysis (HTA) as an important complementary evaluation method to usability testing of discovery layers. Relevant literature is reviewed for the discovery layers and the HTA …

Go to article

Setting The Stage For Success: Developing An Orientation Program For Academic Library Faculty, Sharon A. Weiner Jan 2015

Setting The Stage For Success: Developing An Orientation Program For Academic Library Faculty, Sharon A. Weiner

Libraries Faculty and Staff Scholarship and Research

No abstract provided.

Go to article

Pay-As-You-Go Feedback In Data Quality Systems, Romila Pradhan, Siarhei Bykau, Sunil Prabhakar Jan 2015

Pay-As-You-Go Feedback In Data Quality Systems, Romila Pradhan, Siarhei Bykau, Sunil Prabhakar

Department of Computer Science Technical Reports

No abstract provided.

Go to article

What Do Experienced Water Managers Think Of Water Resources Of Our Nation And Its Management Infrastructure?, Faisal Hossain, Jeffrey R. Arnold, Edward Beighley, Casey M. Brown, Steven J. Burian, Ji Chen, Anindita Mitra, Dev Dutta S Niyogi, Roger A. Pielke, Vincent C. Tidwell, Dave Wegner Jan 2015

What Do Experienced Water Managers Think Of Water Resources Of Our Nation And Its Management Infrastructure?, Faisal Hossain, Jeffrey R. Arnold, Edward Beighley, Casey M. Brown, Steven J. Burian, Ji Chen, Anindita Mitra, Dev Dutta S Niyogi, Roger A. Pielke, Vincent C. Tidwell, Dave Wegner

Department of Earth, Atmospheric, and Planetary Sciences Faculty Publications

This article represents the second report by an ASCE Task Committee "Infrastructure Impacts of Landscape-driven Weather Change" under the ASCE Watershed Management Technical Committee and the ASCE Hydroclimate Technical Committee. Herein, the 'infrastructure impacts" are referred to as infrastructure-sensitive changes in weather and climate patterns (extremes and non-extremes) that are modulated, among other factors, by changes in landscape, land use and land cover change. In this first report, the article argued for explicitly considering the well-established feedbacks triggered by infrastructure systems to the land-atmosphere system via landscape change. In this report by the ASCE Task Committee (TC), we present the …

Go to article

Wandering The Web--Making Things Of Makerspaces, Anthony Paganelli Jan 2015

Wandering The Web--Making Things Of Makerspaces, Anthony Paganelli

Against the Grain

No abstract provided.

Go to article

Wandering The Web: African American Vietnam Veterans, Audrey Robinson-Nkongola Jan 2015

Wandering The Web: African American Vietnam Veterans, Audrey Robinson-Nkongola

Against the Grain

No abstract provided.

Go to article

Practitioner Inquiry: Articulating A Model For Rad Research In The Writing Center, Georganne Nordstrom Jan 2015

Practitioner Inquiry: Articulating A Model For Rad Research In The Writing Center, Georganne Nordstrom

The Writing Center Journal

No abstract provided.

Go to article

What Do Students Experience As Peer Leaders Of Learning Teams?, Eric C. Johnson, Brett A. Robbins, Michael Loui Jan 2015

What Do Students Experience As Peer Leaders Of Learning Teams?, Eric C. Johnson, Brett A. Robbins, Michael Loui

School of Engineering Education Faculty Publications

In a course for engineering freshmen, peer leaders facilitated optional study sessions, which implemented peer-led team learning workshops. Some leaders were paid teaching assistants, but most were undergraduate volunteers. To understand the experiences of the peer leaders, we asked them to keep weekly reflective journals. By performing a basic qualitative analysis of fourteen journals from two semesters, we developed a description of the experience of leading peer-led team learning workshops over the course of the semester. At the beginning of the semester, the leaders were apprehensive about teaching and concerned with correctly answering students’ questions. As the semester progressed, the …

Go to article

First Prev Next Last