Digital Commons Network^™

Purdue Science K-12 Outreach: Impact For K-12 Schools In Indiana, Bill Walker, Bill Bayley, Isidore Julien, Phil Sands, David Sederberg, Steven Smith

Purdue P-12 Networking Summit & Poster Session

For over 25 years Purdue Science K-12 Outreach has worked to increase interest and achievement in K-12 science and mathematics. Outreach coordinators, representing the departments in the College of Science, establish cooperative relationships with elementary and secondary schools to bring the latest developments in discipline-based science and mathematics education to the classroom. Programs include translating research into practice and using technology to support K-12 student learning. The Science K-12 Outreach program is actively involved with state education organizations and government agencies. Coordinators regularly participate with the Hoosier Association of Science Teachers, the Indiana Computer Educators, and the Indiana Council of …

Purdue Polytechnic Institute And Project Lead The Way (Pltw), Kevin Kaluf

Purdue P-12 Networking Summit & Poster Session

No abstract provided.

Energy3d: Guiding Engineering Design With Science Simulations, Chandan Dasgupta, Alejandra J. Magana, Lisa Kirkham

Purdue P-12 Networking Summit & Poster Session

The Purdue P-12 Networking Summit gives Purdue faculty and staff engaged with P-12 schools a forum to interact with each other, share ideas, and develop collaborations that make programs more effective. Faculty and staff are invited to attend.

Conceptual Model-Based Problem Solving: A Response To Intervention Program In Mathematics Problem Solving (Comps-Rti), Yan Ping Xin, Victor Chen, Signe E. Kastberg

Purdue P-12 Networking Summit & Poster Session

No abstract provided.

Engrteams: Engineering To Transform The Education Of Analysis, Measurement, And Science, Tamara J. Moore, S. Selcen Guzey, Emilie A. Siverling

Purdue P-12 Networking Summit & Poster Session

No abstract provided.

Creating A Stem Community Of Practice To Support Stem Teacher Retention, Jennifer Hicks, Brandon Sorge, Jeff Thomas, Jeff Nowak, Deb Vannatter, Joseph Bellina

Purdue P-12 Networking Summit & Poster Session

No abstract provided.

Stem Integration: Using A Hydroponic Curriculum To Engage Stem Integration, Hui-Hui Wang, Sanjay Rebello, Petrus Langenhoven, Kathryn Orvis

Purdue P-12 Networking Summit & Poster Session

No abstract provided.

Build Strong Bodies And Minds Through Service Learning, David Sederberg

Purdue P-12 Networking Summit & Poster Session

In Physics and Astronomy at Purdue, service learning is an essential component to our outreach programs. While providing authentic deliverables to the “customer,” service learning engages individuals in ways through which they are able to make meaningful contributions, while at the same time developing their own knowledge and expertise in an area of personal interest or commitment. That learning may involve leadership, instructional design, communication of science fundamentals and applications to K-12 and general audiences, research, reflective practice, and the acquisition of skills that last a lifetime. This presentation illustrates ways in which we leverage resources between service learning and …

Indiana Science Initiative Increases Istep+ Passing Rates, Paul Ainslie

Purdue P-12 Networking Summit & Poster Session

No abstract provided.

Texture Modelling Using Convolutional Neural Networks, Leon A. Gatys, Alexander S. Ecker, Matthias Bethge

MODVIS Workshop

We introduce a new model of natural textures based on the feature spaces of convolutional neural networks optimised for object recognition. Samples from the model are of high perceptual quality demonstrating the generative power of neural networks trained in a purely discriminative fashion. Within the model, textures are represented by the correlations between feature maps in several layers of the network. We show that across layers the texture representations increasingly capture the statistical properties of natural images while making object information more and more explicit. Extending this framework to texture transfer, we introduce A Neural Algorithm of Artistic Style that …

Failure Of Surface Color Cues Under Natural Changes In Lighting, David H. Foster, Iván Marín-Franch

MODVIS Workshop

Color allows us to effortlessly discriminate and identify surfaces and objects by their reflected light. Although the reflected spectrum changes with the illumination spectrum, cone photoreceptor signals can be transformed to give useful cues for surface color. But what happens when both the spectrum and the geometry of the illumination change, as with lighting from the sun and sky? Is it possible, as a matter of principle, to obtain reliable cues by processing cone signals alone? This question was addressed here by estimating the information provided by cone signals from time-lapse hyperspectral radiance images of five outdoor scenes under natural …

Identifying Falsifiable Predictions Of The Divisive Normalization Model Of V1 Neurons, Tadamasa Sawada, Alexander A. Petrov

MODVIS Workshop

The divisive normalization model (DNM, Heeger, 1992) accounts successfully for a wide range of phenomena observed in single-cell physiological recordings from neurons in primary visual cortex (V1). The DNM has adjustable parameters to accommodate the diversity of V1 neurons, and is quite flexible. At the same time, in order to be falsifiable, the model must be rigid enough to rule out some possible data patterns. In this study, we discuss whether the DNM predicts any physiological result of the V1 neurons based on mathematical analysis and computational simulations. We identified some falsifiable predictions of the DNM. The main idea is …

Derivatives And Inverse Of A Linear-Nonlinear Multi-Layer Spatial Vision Model, Borja Galan, Marina Martinez-Garcia, Praveen Cyriac, Thomas Batard, Marcelo Bertalmio, Jesus Malo

MODVIS Workshop

Analyzing the mathematical properties of perceptually meaningful linear-nonlinear transforms is interesting because this computation is at the core of many vision models. Here we make such analysis in detail using a specific model [Malo & Simoncelli, SPIE Human Vision Electr. Imag. 2015] which is illustrative because it consists of a cascade of standard linear-nonlinear modules. The interest of the analytic results and the numerical methods involved transcend the particular model because of the ubiquity of the linear-nonlinear structure.

Here we extend [Malo&Simoncelli 15] by considering 4 layers: (1) linear spectral integration and nonlinear brightness response, (2) definition of local contrast …

Focusing On Selection For Fixation, John K. Tsotsos, Calden Wloka, Yulia Kotseruba

MODVIS Workshop

Building on our presentation at MODVIS 2015, we continue in our quest to discover a functional, computational, explanation of the relationship among visual attention, interpretation of visual stimuli, and eye movements, and how these produce visual behavior. Here, we focus on one component, how selection is accomplished for the next fixation. The popularity of saliency map models drives the inference that this is solved; we suggested otherwise at MODVIS 2015. Here, we provide additional empirical and theoretical arguments. We then develop arguments that a cluster of complementary, conspicuity representations drive selection, modulated by task goals and history, leading to a …

Inquiry-Based Learning For Faculty And Institutional Development: A Conceptual And Practical Resource For Educators, Suha R. Tamim

Interdisciplinary Journal of Problem-Based Learning

No abstract provided.

Inquiry And Innovation In The Classroom: Using 20% Time, Genius Hour, And Pbl To Drive Student Success, Aysenur Ozyer, Brent G. Wilson

Interdisciplinary Journal of Problem-Based Learning

No abstract provided.

The Empathy Project: Using A Project-Based Learning Assignment To Increase First-Year College Students’ Comfort With Interdisciplinarity, Micol Hutchison

Interdisciplinary Journal of Problem-Based Learning

Empathy and interdisciplinarity are both concepts that are current and relevant—across professions, in research, and in academia. This paper describes a large, interdisciplinary, project-based assignment, the Empathy Project, which allows students to delve into and increase comfort and skill with interdisciplinary thinking and collaborative learning, while improving the core college skills of written and oral communication, ethical and quantitative reasoning, and critical thinking. As I revised the assignment based on student feedback and results, I found that group conferences and time in class to work collaboratively were beneficial. Additionally, building increased scaffolding into the assignment, including greater student and group …

Challenges Experienced By Korean Medical Students And Tutors During Problem-Based Learning: A Cultural Perspective, Hyunjung Ju, Ikseon Choi, Byoung Doo Rhee, Jong Tae-Lee

Interdisciplinary Journal of Problem-Based Learning

How people learn is influenced by the cultural contexts in which their learning occurs. This qualitative case study explored challenges Korean medical students and tutors experienced during their PBL sessions from a cultural perspective using Hofstede’s cultural dimensions. Twelve preclinical medical students and nine tutors from a large Korean medical school participated in interviews. The interview data were analyzed using the constant comparative method and classified according to Hofstede’s cultural dimensions. Twenty-two themes emerged within the following overarching categories: large power distance (6 themes), high uncertainty avoidance (6), individualism (3), collectivism (4), and masculinity/short-term orientation (3). This article discusses culturally …

Energy Transfer And Localization In Molecular Crystals, Mitchell A. Wood

Open Access Dissertations

With the aim of developing new technologies for the detection and defeat of energetic materials, this collection of work was focused on using simulations to characterize materials at extremes of temperature, pressure and radiation. Each branch of the work here is collected by which material response is potentially used as the detectable signal.

Where the chemical response is of interest, this work will explore the possibility of non-statistical chemical reactions in condensed-phase energetic materials via reactive molecular dynamics (MD) simulations. We characterize the response of three unique high energy density molecular crystals to different means of energy input: electric fields …

Numerical And Analytical Modeling To Determine Performance Trade-Offs In Hydrogel-Based Ph Sensors, Piyush Dak, Muhammad Ashraful Alam

Birck and NCN Publications

Hydrogel based pH sensors are promising candidates for implantable sensors due to their low-cost and biocompatibility. Despite their commercial potential and numerous theoretical/experimental reports, the trade-offs between different performance parameters are not well understood, and explicitly stated. In this work, we develop a numerical and analytical framework to show that there is a fundamental trade-off between the performance parameters i.e. sensitivity/dynamic range vs. response-time/response-asymmetry in hydrogel sensors under constrained swelling conditions. Specifically, we consider the effect of the gel parameters, such as the ionizable group density ( N_f) and its dissociation constant ( K_a), on the …

Simulation Of Conservation Practice Effects On Water Quality Under Current And Future Climate Scenarios, Carlington W. Wallace

Open Access Dissertations

Analysis of the effects of implementing different conservation practices, as well as increased levels of conservation practices under existing and projected future climate, will determine if current conservation practice recommendations will be sufficient to maintain soil and water resources. The Soil and Water Assessment Tool (SWAT) was used to study four watersheds of different sizes (CCW = 680 km2, F34 = 183 km2, AXL = 42 km 2 and ALG = 20 km2) located in Northeastern Indiana. The overarching goal of this study was to evaluate the effect of various agricultural practices on runoff and agricultural chemical losses under current …

Markov-Based Ranking Methods, Baback Vaziri

Open Access Dissertations

Ranking methods are an essential tool to help make decisions. This dissertation document examines different aspects of the theory and application of pairwise comparison ranking methods, specifically those that use Markov chains. First, a new method is developed to solve a traditional recruiting problem, and is shown to improve the predictive power of its ranking. Next, modifications are made to an existing method that theoretically improves the reliability, while maintaining the rank integrity. Last, a framework is developed that defines a fair and comprehensive ranking method, and several popular methods are evaluated in their ability to adhere to the said …

Information Overload In Structured Data, Pinar Yanardag Delul

Open Access Dissertations

Information overload refers to the difficulty of making decisions caused by too much information. In this dissertation, we address information overload problem in two separate structured domains, namely, graphs and text.

Graph kernels have been proposed as an efficient and theoretically sound approach to compute graph similarity. They decompose graphs into certain sub-structures, such as subtrees, or subgraphs. However, existing graph kernels suffer from a few drawbacks. First, the dimension of the feature space associated with the kernel often grows exponentially as the complexity of sub-structures increase. One immediate consequence of this behavior is that small, non-informative, sub-structures occur more …

Homological Properties Of Determinantal Arrangements, Arnold H. Yim

Open Access Dissertations

We study a certain family of hypersurface arrangements known as determinantal arrangements. Determinantal arrangements are a union of varieties defined by minors of a matrix of indeterminates. In particular, we investigate determinantal arrangements using the 2-minors of a 2 × n generic matrix (which can be thought of as natural extensions of braid arrangements), and prove certain statements about their freeness. We also study the topology of these objects. We construct a fibration for the complement of free determinantal arrangements, and use this fibration to prove statements about their homotopy groups. Furthermore, we show that the Poincaré polynomial of the …

Writing Their Way To The University: An Investigation Of Chinese High School Students' Preparation For Writing In English In High Schools, Cram Schools, And Online, Cong Zhang

Open Access Dissertations

In this dissertation, drawing from activity theory, I investigate how Chinese students prepared themselves for undergraduate studies in U.S. universities in terms of English writing from three perspectives: English writing instruction in high schools, private supplementary tutoring (PST) in English writing in cram schools, and experience with writing online and using online resources. On the basis of data from a questionnaire, interviews, classroom observations, and examinations of written materials and a forum, I provide a picture of the writing instruction experience and writing background that Chinese students bring to writing classrooms in U.S. universities. It was found that other than …

Investigation Of Climate Variability And Climate Change Impacts On Corn Yield In The Eastern Corn Belt, Usa, Ruoyu Wang

Open Access Dissertations

The increasing demand for both food and biofuels requires more corn production at global scale. However, current corn yield is not able to meet bio-ethanol demand without jeopardizing food security or intensifying and expanding corn cultivation. An alternative solution is to utilize cellulose and hemi-cellulose from perennial grasses to fulfill the increasing demand for biofuel energy. A watershed level scenario analysis is often applied to figure out a sustainable way to strike the balance between food and fuel demands, and maintain environment integrity. However, a solid modeling application requires a clear understanding of crop responses under various climate stresses. This …

Performance Benchmarks For Scholarly Metrics Associated With Fisheries And Wildlife Faculty, Robert K. Swihart, Mekala Sundaram, Tomas O. Höök, James Andrew Dewoody, Kenneth F. Kellner

Department of Forestry & Natural Resources Faculty Publications

Research productivity and impact are often considered in professional evaluations of academics, and performance metrics based on publications and citations increasingly are used in such evaluations. To promote evidence-based and informed use of these metrics, we collected publication and citation data for 437 tenure-track faculty members at 33 research-extensive universities in the United States belonging to the National Association of University Fisheries and Wildlife Programs. For each faculty member, we computed 8 commonly used performance metrics based on numbers of publications and citations, and recorded covariates including academic age (time since Ph.D.), sex, percentage of appointment devoted to research, and …

Zephyr: A Social Psychology-Based Mobile Application For Long-Distance Romantic Partners, Dhiraj Bodicherla

Open Access Theses

Long-distance romantic relationships have become quite common nowadays. With CMC tools advancing day-by-day, their usage among LDRs is proliferating rapidly. Attachment-related anxiety and avoidance can block the ability to enjoy happy relationships. During such situations, remembering happy past moments can be comforting. In this study a mobile chat application that enables LDR couples to reminisce about happy moments was developed. This study primarily focuses on evaluating the usability of this mobile application using survey-based methods. System Usability Scale was considered to discuss the outcome of the study. The overall results provide useful recommendations for further improvements in the design of …

Revisiting Chiara Lubich’S Paradise ’49 In Light Of The Letter To The Ephesians, Gérard Rossé

Claritas: Journal of Dialogue and Culture

This article is the first in a four-part study. It begins with the idea that genuine Christian mysticism and the thought it produces is never separated from faith. Rather, it produces a faith lived with greater clarity and intensity. This forms the basis for a study comparing the Letter to the Ephesians with some of Chiara Lubich’s notes on her contemplative experience in 1949. Her experience, the author emphasizes, was born from an experience of communion, of church. Chiara lived in a personal way the reality of the church in its profound identity with the Body of Christ. This reality …

Editor's Introduction, Jennifer Wiley

The Journal of Problem Solving

As noted in the last bibliography of Human Problem Solving compiled by Joachim Funke and reported in the Journal of Problem Solving in 2013, problem solving as a concept and as a research issue has been gaining more interest than ever before. Now in 2016, we can see that publications on the topic further increased to around 1,800 per year in both 2013 and 2014. The papers in this special issue come from two areas of problem solving research, mathematical and creative problem solving, which represent a good part of this growth trend. With this special issue, the journal has …