Engineering Commons^™

Building A Better Pedestrian And Bicycling Infrastructure, Joyce E. Newland

Purdue Road School

The Federal Highway Administration has a long history of supporting pedestrian and bicycle transportation through funding, policy guidance, program management, and resource development. This Strategic Agenda for Pedestrian and Bicycle Transportation builds on this support and sets the stage for our activities in the coming years.

Compliant Curb Ramp Solutions, Katherine Smutzer

Purdue Road School

Public Rights of Way Accessibility Guidelines (PROWAG) for Curb Ramps. Answers to frequently asked questions for Curb Ramps and Curb Ramp Designs. Examples of curb ramp designs in restricted conditions and other types of curb ramp examples.

Portable Signals: Indot Design Guidance And Specifications, Joseph Bruno

Purdue Road School

Until recently portable traffic signals, which are mounted on towable trailer supports, were not allowed in Indiana. However, portable signals have many advantages over fixed temporary signals, so the Indiana Manual on Uniform Traffic Control Devices was revised to allow them, and specifications for their use are now in place. This presentation provides an overview of portable signals, including INDOT’s current design and specification requirements for these devices.

Mash Implementation For Guardrail, Katherine Smutzer

Purdue Road School

A review of the Manual for Assessing Safety Hardware (MASH) Implementation for w-beam guardrail. What will change and what designers need to know when moving to MASH.

Construction Specifications And Special Provisions, Scott Trammell, Melissa Russell

Purdue Road School

The purpose of this presentation is to help project managers and designers prepare the necessary information required for their contracts with regard to the Standard Specifications and any necessary special provisions. Attendees will be exposed to examples of the right way to incorporate a Unique Special Provision, as well as things to avoid and questions to ask. It is important to know the proper way to write and present a Unique Special Provision.

Testing And Evaluation Of Modern Lighting Technologies, David Boruff

Purdue Road School

This presentation provides an overview of one of the steps INDOT has taken in order to make the change to solid state lighting technology: the adoption of a testing procedure and approved materials list for luminaires.

2017 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work, Indiana Ltap

Indiana Local Technical Assistance Program (LTAP) Directory

Contact information for agency officials and employees responsible for Indiana’s local road infrastructure.

A New Approach For Realistic 3d Reconstruction Of Planar Surfaces From Laser Scanning Data And Imagery Collected Onboard Modern Low-Cost Aerial Mapping Systems, Zahra Lari, Naser El-Sheimy, Ayman Habib

Lyles School of Civil Engineering Faculty Publications

Over the past few years, accurate 3D surface reconstruction using remotely-sensed data has been recognized as a prerequisite for different mapping, modelling, and monitoring applications. To fulfill the needs of these applications, necessary data are generally collected using various digital imaging systems. Among them, laser scanners have been acknowledged as a fast, accurate, and flexible technology for the acquisition of high density 3D spatial data. Despite their quick accessibility, the acquired 3D data using these systems does not provide semantic information about the nature of scanned surfaces. Hence, reliable processing techniques are employed to extract the required information for 3D …

Multi-Resolution Codebook And Adaptive Beamforming Sequence Design For Millimeter Wave Beam Alignment, Song Noh, Michael D. Zoltowski, David J. Love

Department of Electrical and Computer Engineering Technical Reports

Millimeter wave (mmWave) communication is expected to be widely deployed in fifth generation (5G) wireless networks due to the substantial bandwidth available at mmWave frequencies. To overcome the higher path loss observed at mmWave bands, most prior work focused on the design of directional beamforming using analog and/or hybrid beamforming techniques in largescale multiple-input multiple-output (MIMO) systems. Obtaining potential gains from highly directional beamforming in practical systems hinges on sufficient levels of channel estimation accuracy, where the problem of channel estimation becomes more challenging due to the substantial training overhead needed to sound all directions using a high-resolution narrow beam. …

Road Zipper™, Purdue Ect Team

ECT Fact Sheets Archive

Construction work zones are growing in number around the world. The natural aging of existing roadway infrastructure ensures that more and more maintenance and rehabilitation will be required. Work zones, by their very definition, create two major problems that must be addressed in some way: safety and mobility. In the United States, highway work zones are responsible for almost 25% of all non-recurring congestion and 10% of overall congestion. Vehicle accidents are more common in work zones, and traffic congestion through work zones on urban arterials and freeways is often considered to be “unavoidable." To address these issues, ROAD ZIPPER™ …

2017 Wheel Tax And Excise Surtax Report, Indiana Ltap

Indiana Local Technical Assistance Program (LTAP) Publications

This report contains an overview of the details of the wheel tax and excise surtax, a summary of the recent changes to the Indiana Code regarding the taxes, revenue estimates for both counties and municipalities, an estimate of revenue projected out to 2018, as well as some commonly asked questions and their answers.

Thermal Transport At The Nanoscale: A Fourier's Law Vs. Phonon Boltzmann Equation Study, Jan Kaiser, T. Feng, Jesse Maassen, X. Wang, X. Ruan, Mark S. Lundstrom

Other Nanotechnology Publications

Steady-state thermal transport in nanostructures with dimensions comparable to the phonon mean-free-path is examined. Both the case of contacts at different temperatures with no internal heat generation and contacts at the same temperature with internal heat generation are considered. Fourier’s Law results are compared to finite volume method solutions of the phonon Boltzmann equation in the gray approximation. When the boundary conditions are properly specified, results obtained using Fourier’s Law without modifying the bulk thermal conductivity are in essentially exact quantitative agreement with the phonon Boltzmann equation in the ballistic and diffusive limits. The errors between these two limits are …

Simulation Of Dust Grain Charging Under Tokamak Plasma Conditions, Zhuang Liu, Dezhen Wang, Gennady Miloshevsky

School of Nuclear Engineering Faculty Publications

Dust grains in fusion devices may be radioactive, contain toxic substances, and may penetrate into the core plasma resulting in the termination of plasma discharges. Therefore, it is important to study the charging mechanisms of dust grains under tokamak's plasma conditions. In this paper, the charging processes of carbon dust grains in fusion plasmas are investigated using the developed dust simulation (DS) code. The Orbital Motion Limited (OML) theory, which is a common tool when solving dust-charging problems, is used to study the charging of dust grains due to the collection of plasma ions and electrons. The secondary electron emission …

Reading And Engineering: Elementary Students’ Co-Application Of Comprehension Strategies And Engineering Design Processes, Amy Wilson-Lopez, Stacie Gregory, Victor Larsen

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

For decades, researchers have asserted that K–12 teachers should embed reading comprehension instruction within each academic discipline, including ‘‘technical subjects’’ such as engineering. Recently, this assertion has become a source of controversy among researchers and practitioners who believe that time spent on teaching reading comprehension strategies may detract from time spent on more authentic activities such as engineering design. The purpose of this exploratory study was to investigate whether and how elementary students’ applications of comprehension strategies overlapped with their application of engineering design processes. The authors provided comprehension strategy instruction to 57 third- and fifth-grade students as they read …

Real-Time Sensing Of Trust In Human-Machine Interactions, Wan-Lin Hu, Kumar Akash, Neera Jain, Tahira Reid

School of Mechanical Engineering Faculty Publications

Human trust in automation plays an important role in successful interactions between humans and machines. To design intelligent machines that can respond to changes in human trust, real-time sensing of trust level is needed. In this paper, we describe an empirical trust sensor model that maps psychophysiological measurements to human trust level. The use of psychophysiological measurements is motivated by their ability to capture a human's response in real time. An exhaustive feature set is considered, and a rigorous statistical approach is used to determine a reduced set of ten features. Multiple classification methods are considered for mapping the reduced …

Disciplinary Differences In Out-Of-School High School Science Experiences And Influence On Students’ Engineering Choices, Allison Godwin, Gerhard Sonnert, Philip M. Sadler

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

Participation from a variety of students is important to the long-term growth of the engineering field. Much of the research on engineering recruitment or career choice has focused on engineering as a whole, even though engineering disciplines are varied in student participation and focus. This work examines how students’ out-of-school interests and experiences in high school predict the likelihood of choosing a career in a particular engineering discipline. Out-of-school experiences offer more unstructured ways for students to meaningfully engage with science and engineering outside of the confines of the classroom. These experiences offer opportunities to spark particular science interests not …

Multi-Stage Nozzle-Shape Optimization For Pulsed Hydrogen-Air Detonation Combustor, Francesco Ornano, James Braun, Bayindir H. Saracoglu, Guillermo Paniagua

School of Aeronautics and Astronautics Faculty Publications

hermal engines based on pressure gain combustion offer new opportunities to generate thrust with enhanced efficiency and relatively simple machinery. The sudden expansion of detonation products from a single-opening tube yields thrust, although this is suboptimal. In this article, we present the complete design optimization strategy for nozzles exposed to detonation pulses, combining unsteady Reynolds-averaged Navier-Stokes solvers with the accurate modeling of the combustion process. The parameterized shape of the nozzle is optimized using a differential evolution algorithm to maxi­ mize the force at the nozzle exhaust. The design of experiments begins with a first optimization considering steady-flow conditions, subsequently …

Engineering Technology Vs. Engineering Students: Differences In Perception And Understanding, Anne M. Lucietto, Jennifer D. Moss, Eddy Efendy, R. Mark French

IMPACT Publications

Engineering technology students either are studied under the auspices of research focused on engineering students, or are excluded from engineering research in its entirety. Even when they are included in research, our understanding of engineering technology students is either missing or obscured. The lack of available research focused on engineering technology students in particular has prompted an effort to contribute to the greater body of knowledge of engineering technology education. The lack of research, as compared to other STEM fields, presents a challenge to practitioners in engineering technology programs when making discipline-specific decisions regarding these particular students.

The need to …

Local Probability Based Transformations And Diagonal Projection: A New Support Vector Machine-Like Method For Classification Of Feature Vectors, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Working Papers

No abstract provided.

Physics Identity Promotes Alternative Careers For First-Generation College Students In Engineering, Dina Verdín, Allison Godwin

School of Engineering Education Graduate Student Series

This research study explored first-generation college students’ in engineering post-graduation career intentions based on responses to a quantitative survey. In this paper, we answer the following research questions: 1) How do first-generation college students’ measures of physics, mathematics, and engineering identity constructs differ compared to non-first-generation college students? and 2) How does a physics identity influence first-generation college student’s choice of an engineering major and career aspirations? The data came from the Intersectionality of Non- normative Identities in the Cultures of Engineering (InIce) survey. InIce was completed by 2,916 first-year engineering college students enrolled in four institutions across the United …

Meta-Analysis Of Studies On Cpr: A Better Route To New Practice Guidelines, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Working Papers

Quantitative synthesis of research results multiple small clinical trials using the statistical techniques of meta-analysis yields conclusions in excellent agreement with large randomized “mega-trails”. The present paper introduces a simple yet powerful method of meta-analysis for combining results of any published studies of a proposed treatment compared with a suitable control. These may include pre-clinical or clinical models generating either continuous or dichotomous data.

Quantifying And Assessing Trends On The National Science Foundation’S Broader Impact Criterion, Dina Verdín

School of Engineering Education Graduate Student Series

The American Innovation and Competitiveness Act (S.3084) reapproved the National Science Foundation’s (NSF) merit review criteria i.e. Intellectual Merit and Broader Impacts, called for an update of the policy guidelines for NSF staff members and merit review process participants, and emphasized the importance of transparency and accountability. Evaluating Project Summaries based on Intellectual Merit and Broader Impacts has been the standard of maintaining excellence and accountability since 1997. Intellectual merit consists of proposing activities that advance knowledge, while Broader Impacts statements, “describe the potential of the proposed activity to benefit society and contribute to the achievement of specific, desired societal …

Video-Related Pedagogical Strategies In Massive Open Online Courses: A Systematic Literature Review, Nathan Hicks, Wei Zakharov, Kerrie Douglas, Judith Nixon, Heidi Diefes-Dux, Peter Bermel, Krishna Madhavan

Libraries Faculty and Staff Scholarship and Research

For engineers who work with rapidly changing technology in multi-disciplinary teams, massive open online courses (MOOCs) offer the unique ability to deliver free, convenient professional development by providing up-to-date information spanning a wide range of disciplines. However, the MOOC boom has not been without its criticisms; many question the effectiveness of MOOCs. In response, many research studies are being conducted across the world to explore the effectiveness of various pedagogical approaches in MOOCs for different stakeholders. As videos constitute one of the most prominent features of MOOCs, it is important to analyse the empirical evidence of best practices for MOOC …

Testing For Measurement Invariance In Engineering Identity Constructs For First-Generation College Students, Dina Verdín, Allison Godwin

School of Engineering Education Graduate Student Series

This work-in-progress research study examines the response patterns of first-generation college students (FGCS) to the engineering identity measures compared to non-first- generation college students (non-FGCS). This work answers the following research question, “Do FGC and non-FGC engineering students interpret the engineering identity measurement items in a conceptually different manner?” We explore if FGCS respond to engineering identity items similarly to non-FGCS and the fairness of using these instruments for FGCS to make claims about this group. The data for this work are from a survey instrument completed by 2,916 first-year engineering college students from four U.S. institutions. We hypothesize that …

Increased Risk Of Children For Subtle Closed Head Injury From Soccer Heading, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Working Papers

No abstract provided.

Valveless Pumping: The Reflected Pulse Wave Hypothesis, Charles F. Babbs

Weldon School of Biomedical Engineering Faculty Working Papers

No abstract provided.

Case Study On The Two Individual Paradigms Of Education In A Manufacturing Quality Course, Rustin Webster, Matthew Turner

School of Engineering Technology Faculty Publications

This article provides a review of two paradigms of education and the application of each in a manufacturing quality control course for engineering technology (ET) students. The most common paradigm of education used in quality-focused courses is teaching-centered. This traditional method has contributed to students’ perception of quality (e.g., quality control, statistical process control, total quality management), as a dry subject to learn compared to other core and/or elective courses in their plans of study. This case study describes the creation and implementation of a manufacturing quality control curriculum that is learning centered. Based on student feedback, this approach increased …

Social And Latent Identities That Contribute To Diverse Students’ Belongingness In Engineering, Brianna Benedict, Dina Verdín, Allison Godwin, Thaddeus Milton

School of Engineering Education Graduate Student Series

This work-in-progress (WIP) research paper investigates contributing factors for how students describe what it means to be an engineer and what particular characteristics enable students to belong in engineering. We answer the research question, "What are the key contributing factors that influence how diverse students feel that they belong in engineering?" We used a semi-structured protocol to interview 12 diverse engineering students during Fall 2016 about their pathways into engineering, identities, and belongingness in engineering. The participants were selected from a pool of students who completed an attitudinal survey during Fall 2015 as a part of a larger study. They …

An Evaluation Of Flipped Courses In Electrical Engineering Technology Using Course Learning Outcomes And Student Course Assessments, M. Turner, Rustin Webster

School of Engineering Technology Faculty Publications

This paper describes the results of flipping two courses in an electrical engineering technology program with the objective of increasing student achievement and enthusiasm. Both an electromagnetics and electric power course were re-designed to utilize pre-class on-line videos in replace of live “chalk and talk” lectures, with a variety of active learning strategies implemented during class time, including discussion based learning, peer instruction, and group work. To evaluate the efficacy of the approach, assessment metrics tied to course learning outcomes from each class were compared under traditional and flipped conditions, as were student provided end of semester course evaluations. Additionally, …

Stability And Interfacial Viscoelasticity Of Oil-Water Nanoemulsions Stabilized By Soy 2 Lecithin And Tween 20 For The Encapsulation Of Bioactive Carvacrol, Jerome J. Nash, Kendra Erk

School of Materials Engineering Faculty Publications

The rheology of oil-in-water (O/W) droplet interfaces stabilized by food-grade emulsifiers (soy lecithin or Tween 20) under controlled aqueous conditions was investigated to elucidate its contribution in the kinetic stabilization of nanoemulsion-based delivery systems containing carvacrol, a naturally-derived antimicrobial compound. Dilational rheology of surfactant-laden O/W interfaces was measured using axisymmetric drop shape analysis. The kinetic stability of corresponding nanoemulsions (containing mixtures of carvacrol and medium-chain triglyceride (MCT) oil dispersed in water (pH 7)) was characterized using dynamic light scattering. Zwitterionic lecithin molecules adsorbed to the O/W interface for 24 h formed a notably viscoelastic layer, compared to nonionic Tween 20 …