Digital Commons Network^™

Collaborative Product–Service Approach To Aviation Maintenance, Repair, And Overhaul. Part I: Quantitative Model, Cassio Dias Goncalves, Michael Kokkolaras

Journal of Aviation Technology and Engineering

This two-part paper proposes a new collaborative approach to airframe maintenance, repair, and overhaul (MRO). A quantitative model is introduced in Part I to represent the business relationships between original equipment manufacturers (OEMs) and MRO enterprises. In Part II, the presented model is used to assess potential financial benefits obtained by each of these stakeholders as a result of the collaboration.

The quantitative model is built to capture the main dependencies between an independent MRO enterprise operating in South America and its interactions with three major airframe OEMs. Interviews were conducted with MRO and OEM professionals to identify the most …

Implementing Ngss Engineering Disciplinary Core Ideas In Middle School Science Classrooms: Results From The Field, Jessica Gale, Jayma Koval, Mike Ryan, Marion Usselman, Stefanie Wind

Journal of Pre-College Engineering Education Research (J-PEER)

With the inclusion of engineering disciplinary core ideas (DCIs), the Next Generation Science Standards (NGSS) position engineering as a new priority in K–12 science classrooms. This paper reports findings from the implementation of SLIDER, a problem-based learning 8th grade physical science curriculum that integrates engineering and physical science core ideas. As a culminating engineering design challenge, the SLIDER curriculum asks students to apply their understanding of energy, motion, and forces to design an automatic braking system for a robotic truck. The paper describes the curriculum and synthesizes findings from an array of data sources including student design interviews, written design …

Wide And Deep Neural Networks In Remote Sensing: A Review, Okan Ersoy

Department of Electrical and Computer Engineering Technical Reports

Wide and deep neural networks in multispectral and hyperspectral image classification are discussed. Wide versus deep networks have always been a topic of intense interest. Deep networks mean large number of layers in the depth direction. Wide networks can be defined as networks growing in the vertical direction. Then, wide and deep networks are networks which have growth in both vertical and horizontal directions. In this report, several directions in order to achieve such networks are described. We first review a methodology called Parallel, Self-Organizing, Hierarchical Neural Networks (PSHNN’s) which have stages growing in the vertical direction, and each stage …

Transcribing Braille Code: Learning Equations Across Platforms, Deegan Atha, Courtney Balogh

Purdue Journal of Service-Learning and International Engagement

Deegan Atha, a graduating senior in electrical engineering and a future engineer, is interested in human-centered design and developing technology that helps students engage and be successful in STEM.

Courtney Balogh, a junior in mechanical engineering, is interested in human-centered design and the importance it plays in product development. Deegan and Courtney are members of the Purdue EPICS project, Learning Equations Across Platforms (LEAP). They partnered with the Indiana School for the Blind and Visually Impaired (ISBVI) to develop a braille transcription device and web application that converts braille to print in real time.

Scaffolding For Optimal Challenge In K–12 Problem-Based Learning, Nam Ju Kim, Brian R. Belland, Daryl Axelrod

Interdisciplinary Journal of Problem-Based Learning

Establishing optimal challenge enhances intrinsic motivation, interest, and the probability of success in the learning activity. In K–12 problem-based learning (PBL), students may struggle to address associated tasks that are beyond their current ability levels. This paper suggested learner-centered scaffolding systems (LSS) to improve K–12 students’ perception of optimal challenge by addressing their learning issues in PBL. LSS enhances students’ experience in autonomy and competence by providing multiple types of scaffolding in accordance with students’ different needs and difficulties in PBL. Students can control the nature and frequency of scaffolding by themselves according to their needs and ability, and it …

Exploring Authenticity Through An Engineering-Based Context In A Project-Based Learning Mathematics Activity, Bradley Bowen, Bryanne Peterson

Journal of Pre-College Engineering Education Research (J-PEER)

As education works to reconnect student learning to something more than standardized testing, project-based learning (PBL) has become a popular way to increase student engagement while providing more authentic applications of student knowledge. While research regarding PBL is bountiful, little has been done to connect this body of research with student perceptions regarding its classroom application, especially concerning authenticity and student engagement. This research focuses on the topic of ‘‘task authenticity’’ as a means to improve student outcomes. Two groups of seventh-grade students were presented the concept of slope and y-intercept in the context of engineering-based activities. The research …

Search And Review Of The Literature On Engineering Design Challenges In Secondary School Settings, Matthew Lammi, Cameron Denson, Paul Asunda

Journal of Pre-College Engineering Education Research (J-PEER)

Engineering design activities offer the promise of enhanced learning and teaching in pre-college science, technology, engineering, and mathematics (STEM) settings. The wide variation and lack of coherence in research and practice concerning pre-college engineering design challenges necessitates an investigation of the literature. The overarching research question guiding this search and review of literature was, ‘‘How are engineering design challenges conceptualized in pre-college environments?’’ A search and review coupled with iterative thematic analysis was employed to understand and conceptualize the current body of literature on pre-college engineering design challenges. It is anticipated that this review will provide a general picture of …

Stem Roles: How Students’ Ontological Perspectives Facilitate Stem Identities, Dina Verdín, Allison Godwin, Monique Ross

Journal of Pre-College Engineering Education Research (J-PEER)

Educational researchers have explored the importance of performance, recognition, and interest in establishing and maintaining a STEM identity. Research has also demonstrated that the ways students describe themselves and how they participate in STEM communities can provide insight into their role identity salience; however, there has been little work to explore the ontological beliefs of students about STEM people and how this influences their ability to see themselves as possessing a STEM identity. This research explores the ontological beliefs of high school students, with specific attention to the ways in which they describe what constitutes a math person, science person, …

Enhancing Your Intelligence Agency Information Resource Iq: Pt. 4: National Geospatial Intelligence Agency (Ngia), National Intelligence University (Niu), And National Reconnaissance Office (Nro), Bert Chapman

Libraries Faculty and Staff Presentations

Webinar presentation on publicly accessible information resources produced by the U.S. National Geospatial Intelligence Agency (NGIA), National Intelligence University (NIU), and National Reconnaissance Office. Places significant emphasis on missions of these agencies, their historical accomplishments, coverage of their educational activity, and information on the technologies they have used and are currently using to fulfill their institutional objectives.

Magis Brugge: Visualizing Marcus Gerards’ 16th-Century Map Through Its 21st-Century Digitization, Elien Vernackt

Artl@s Bulletin

Marcus Gerards delivered his town plan of Bruges in 1562 and managed to capture the imagination of viewers ever since. The 21^st century digitization project MAGIS Brugge, supported by the Flemish government, has helped to treat this map as a primary source worthy of examination itself, rather than as a decorative illustration for local history. A historical database was built on top of it, with the analytic method called ‘Digital Thematic Deconstruction.’ This enabled scholars to study formally overlooked details, like how it was that Gerards was able to balance the requirements of his patrons against his own …

Gis To Address Questions In Forest Ecology And Management, Nicolas Picard

Purdue GIS Day

Geographic Information Systems (GIS) are powerful tools to deal with spatialized issues. As such, they have become routine tools in forestry to delimit forest resources, support the design of forest inventories, map forest resources, and analyze, model and support decision making to sustainably manage forests. Two examples will be provided to show how forest management can benefit from progress in GIS technology. The first one deals with the optimization of forest roads to harvest trees in tropical rainforests. It required the development of heuristics to solve the multiple target access problem in a reasonable time. The second one deals with …

My Laptop Takes Forever, Now What!, Eric Adams

Purdue GIS Day

ITAP Research Computing's Data Workbench offers researchers access to an interactive computing environment for non-batch big data analysis and simulation. Researchers who outgrow their local computing resources can benefit from the extra computing power that Data Workbench offers without jumping directly into the High-Performance Computing clusters.

In this presentation, we will discuss the details of Data Workbench, file storage options including the Data Depot and how to transfer large files reliably with the Globus research data management service.

D2p: Automatically Creating Distributed Dynamic Programming Codes, Nikhil Hegde, Qifan Chang, Milind Kulkarni

Department of Electrical and Computer Engineering Technical Reports

Dynamic Programming (DP) algorithms are common targets for parallelization, and, as these algorithms are applied to larger inputs, distributed implementations become necessary. However, creating distributed-memory solutions involves the challenges of task creation, program and data partitioning, communication optimization, and task scheduling. In this paper we present D2P, an end-to-end system for automatically transforming a specification of any recursive DP algorithm into distributed-memory implementation of the algorithm. When given a pseudo-code of a recursive DP algorithm, D2P automatically generates the corresponding MPI-based implementation. Our evaluation of the generated distributed implementations shows that they are efficient and scalable. Moreover, D2P-generated implementations are …

Why Teach With Pbl? Motivational Factors Underlying Middle And High School Teachers’ Use Of Problem-Based Learning, Huei-Chen Lee, Margaret R. Blanchard

Interdisciplinary Journal of Problem-Based Learning

This quantitative study examined factors underlying middle and high school teachers’ choices about whether to use problem-based learning (PBL). Survey items measured respondents’ perceived competence, autonomy, and relatedness, and the value and costs they placed on implementing PBL. Teachers who have taught with PBL (n = 126) had significantly more formal PBL professional development, higher levels of perceived competence and value for this pedagogy, perceived more support from peers, and perceived lower costs than did the non–PBL use teachers (n = 30). Findings highlight the importance of formal PBL professional development in increasing teachers’ intention to implement PBL …

Developing Clinical Reasoning Skills In Teacher Candidates Using A Problem-Based Learning Approach, Terry L. Goodin, Nancy G. Caukin, Heather K. Dillard

Interdisciplinary Journal of Problem-Based Learning

In 2013, the Educational Leadership Department at Middle Tennessee State University (MTSU) implemented a redesign of the teacher preparation program to transition from a traditional on-campus model to one delivered both on-campus and in off-campus school sites while using a problem-based learning method. This new program closely follows the medical school model of residency experiences coupled with problem-based learning events. This article describes the problembased learning process used in this program, comparing it with the early versions of medical school problem-based learning that encouraged the development of “clinical reasoning” skills. Similarities and differences are highlighted, along with key components of …

Fatal General Aviation Accidents In Furtherance Of Business (1996–2015): Rates, Risk Factors, And Accident Causes, Scott Burgess, Stewart Boyd, Douglas Boyd

Journal of Aviation Technology and Engineering

Introduction: General aviation missions related to furtherance of business potentially carry higher risk (operations in adverse weather, at night, for longer distances) than those undertaken for recreation. The study herein was undertaken to determine fatal accident rates, proportions, and risk factors/causes.

Method: The National Transportation Safety Board aviation accident database was queried for accidents (1996–2015). Annual fleet times were from the general aviation annual activity survey. Statistical analyses used Poisson distributions, proportion testing, and Cohen’s Kappa tests.

Results: The fatal accident rate for business operations was three- to six-fold lower than the rate for recreational flights with a decline evident …

The Role Of Problem Representation In Producing Near-Optimal Tsp Tours, Pierson Fleischer, Sébastien Hélie, Zygmunt Pizlo

The Journal of Problem Solving

Gestalt psychologists pointed out about 100 years ago that a key to solving difficult insight problems is to change the mental representation of the problem, as is the case, for example, with solving the six matches problem in 2D vs. 3D space. In this study we ask a different question, namely what representation is used when subjects solve search, rather than insight problems. Some search problems, such as the traveling salesman problem (TSP), are defined in the Euclidean plane on the computer monitor or on a piece of paper, and it seems natural to assume that subjects who solve a …

Library Publishing Directory 2019, Library Publishing Coalition

Library Publishing Directory

No abstract provided.

Hypothesis Paper: Mechanism For Primary Blast Induced Traumatic Brain Injury With Minimal Head Motion, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Working Papers

Transit of the human skull by blast waves produces diffuse brain injury. The exact mechanisms are unknown. This paper describes plausible mechanisms in which steep intracranial pressure gradients, demonstrated in prior computational models of blast-skull interaction, produce subsequent deformation and motion of the whole brain within the skull, without obvious movement of the head. Equations of motion are derived to describe the acceleration, velocity, and relative position of both the skull and the brain in response to known extracranial and intracranial pressures both during and several hundred milliseconds after blast wave passage. A finite element model is solved to visualize …

All The Robots Are Coming! The Promise And The Peril Of Ai, Ian Mulvany, Peter Brantley, Ruth Pickering, Elizabeth Caley

Charleston Library Conference

No abstract provided.

Hosting A Library Vendor Week: A Better Way To Manage Site Visits?, Edward F. Lener, Carola Blackwood

Charleston Library Conference

Scheduling meetings between vendors and the appropriate library staff members is often a challenge, and the number of requests for site visits can quickly overwhelm any library calendar. The University Libraries at Virginia Tech recently held its first library vendor week in an attempt to address such concerns. Nearly two dozen vendors took part in the five-day event. This paper provides key lessons we learned during this experience and shares tips and strategies for libraries that may be interested in hosting their own multivendor event. With one perspective provided by the host library, and another from a vendor who took …

O Brave New Print Collection, That Has Such Data Science Books In It!, Heidi Tebbe, Mira Waller

Charleston Library Conference

The field of data science exists at the intersection of several disciplines, including statistics, social science, information science, computer science, and visualization. This can make collection development for data science challenging, but it’s a field that has become increasingly important in industry and academia. Data scientists, and increasingly researchers, academics, and others, work with large amounts of data, complex computation, and data visualization to solve real-world problems. Those working in or studying data science may need to learn new skills and tools to be successful.

North Carolina State University (NCSU) recognizes the importance of this growing field, as shown in …

Are E-Book Packages Overwhelming And Redefining Your Collection?, Rhonda R. Glazier, Matthew J. Jabaily, Lynn E. Gates

Charleston Library Conference

Most academic libraries offer numerous e-books alongside their print titles. Traditionally, print materials have been chosen by subject liaisons with input from departmental faculty, whereas e-books have been acquired en masse through large collection purchases, subscriptions, or PDA/DDA programs that include large numbers of discovery records. At Kraemer Family Library, the print budget is divided into subject areas using a formula that includes the number of students in a discipline, level of program (bachelor, master, or doctorate), number of faculty by discipline, and average cost of materials in a subject area. This budget breakdown is an attempt to balance the …

“Money Doesn’T Grow On Trees”: Using A Data-Driven Review Process To Add New Resources With No Budget Increases, Priya Shenoy, Laura Krossner, Teri Koch

Charleston Library Conference

At Drake University’s Cowles Library, increasing budgetary pressures, combined with improvements in gathering and analyzing usage data, compelled the library in 2014 to reassess its collection development philosophy and approach. This new philosophy—that the value of a resource is directly related to its usage—necessitated a more systematic and analytical process. The library has developed an annual review process that uses data-driven decision making for canceling and acquiring electronic resource subscriptions.

The steps in this process are as follows:

• Reviewing cost-per-use data

• Generating candidate deselection lists (“watchlists”)

• Soliciting faculty feedback via a library liaison process

• Communicating and …

Flexoelectricity-Based Electromechanical Metamaterials, A. Mocci, D. Codony, A. Abdollahi, Irene Arias

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Hidden In Plane Sight: The Extraordinary Vision Of Ernest Irving Freese, Greg Frederickson

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Designed To Fail: Granular Plasticity And Particle Shape, Kieran Murphy, Heinrich Jaeger

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Input-Independent Response-Invariant Wave Propagation In Bistable Lattices With Elastic Interactions, Myungwon Hwang, Andres Arrieta

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Constitutive Modelling Of Cosserat Metamaterials, Haodong Du, Liang Zhang, Bo Peng, Wenbin Yu

IUTAM Symposium Architectured Materials Mechanics

No abstract provided.

Guest Editors' Introduction: Tinkering In Technology-Rich Design Contexts, Mete Akcaoglu, Ugur Kale

Interdisciplinary Journal of Problem-Based Learning

No abstract provided.