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Articles 1 - 30 of 52
Full-Text Articles in Engineering
Brain Motion, Deformation, And Potential Injury During Soccer Heading, Charles F. Babbs
Brain Motion, Deformation, And Potential Injury During Soccer Heading, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Working Papers
This paper addresses the problem of what is happening physically inside the skull during head-ball contact. Mathematical models based upon Newton’s laws of motion and numerical methods are used to create animations of brain motion and deformation inside the skull.
Initially a 1 cm gap filled with cerebrospinal fluid (CSF) separates the brain from the rigid skull in adults and older children. Whole head acceleration induces a pulse of artificial gravity within the skull. Because brain density differs slightly from that of CSF, the brain accelerates and strikes the inner aspect of the skull, undergoing viscoelastic deformation, ranging from 1 …
Comparing Laser Diffraction And Optical Microscopy For Characterizing Superabsorbent Polymer Particle Morphology, Size, And Swelling Capacity, Cole R. Davis, Stacey L. Kelly, Kendra Erk
Comparing Laser Diffraction And Optical Microscopy For Characterizing Superabsorbent Polymer Particle Morphology, Size, And Swelling Capacity, Cole R. Davis, Stacey L. Kelly, Kendra Erk
School of Materials Engineering Faculty Publications
In this study, we determined the accuracy and practicality of using optical microscopy (OM) and laser diffraction (LD) to characterize hydrogel particle morphology, size, and swelling capacity (Q). Inverse-suspension-polymerized polyacrylamide particles were used as a model system. OM and LD showed that the average particle diameter varied with the mixing speed during synthesis for the dry (10–120 lm) and hydrated (34–240 lm) particles. The LD volume and number mean diameters showed that a few large particles were responsible for the majority of the water absorption. Excess water present in the gravimetric swelling measurements led to larger Qs (8.2 6 0.37 …
Indiana Local Roads - An Asset Management Guide For Cities, Towns And Counties, Applied Pavement Technology, Inc.
Indiana Local Roads - An Asset Management Guide For Cities, Towns And Counties, Applied Pavement Technology, Inc.
Indiana Local Technical Assistance Program (LTAP) Publications
This Guide is designed to serve as a resource to agencies adopting an asset management philosophy. It presents an asset management process that can be used by any local agency in Indiana. It also introduces common terminology and helpful hints to get you started. The Guide promotes a statewide approach to gather and analyze the information you need to develop an asset management plan. You can use this Guide to: learn more about what asset management is, identify the steps involved with implementing asset management, discover ways to use data to better communicate with elected officials, develop an effective asset …
Geopolitics Of Rare Earth Elements, Bert Chapman
Geopolitics Of Rare Earth Elements, Bert Chapman
Libraries Faculty and Staff Presentations
Rare earth elements (REE) contain unique chemical physical properties such as lanthamum, are found in small concentrations, need extensive precise properties to separate, and are critical components of modern technologies such as laser guidance systems, personal electronics such as IPhones, satellites, and military weapons systems as varied as Virginia-class fast attack submarines, DDG-51 Aegis destroyers, the F-35 Joint Strike Fighter, and precision guided munitions. The U.S. has some rare earth resources, but is heavily dependent on access to them from countries as varied as Afghanistan, Bolivia, and China. Losing access to these resources would have significant adverse economic, military, and …
Time Series Uav Image-Based Point Clouds For Landslide Progression Evaluation Applications, Abdulla Al-Rawabdeh, Adel Moussa, Marzieh Foroutan, Naser El-Sheimy, Ayman Habib
Time Series Uav Image-Based Point Clouds For Landslide Progression Evaluation Applications, Abdulla Al-Rawabdeh, Adel Moussa, Marzieh Foroutan, Naser El-Sheimy, Ayman Habib
Lyles School of Civil Engineering Faculty Publications
Landslides are major and constantly changing threats to urban landscapes and infrastructure. It is essential to detect and capture landslide changes regularly. Traditional methods for monitoring landslides are time-consuming, costly, dangerous, and the quality and quantity of the data is sometimes unable to meet the necessary requirements of geotechnical projects. This motivates the development of more automatic and efficient remote sensing approaches for landslide progression evaluation. Automatic change detection involving low-altitude unmanned aerial vehicle image-based point clouds, although proven, is relatively unexplored, and little research has been done in terms of accounting for volumetric changes. In this study, a methodology …
Prediction-Based Adaptive Robust Control For A Class Of Uncertain Time-Delay Systems, Jayaprakash Suraj Nandiganahalli, Cheolhyeon Kwon, Inseok Hwang
Prediction-Based Adaptive Robust Control For A Class Of Uncertain Time-Delay Systems, Jayaprakash Suraj Nandiganahalli, Cheolhyeon Kwon, Inseok Hwang
School of Aeronautics and Astronautics Faculty Publications
This paper presents an integrated control design approach for a class of dynamical systems that satisfy a certain matching condition subject to known input time-delay, unknown parameters, and time-varying disturbances, simultaneously. A novel nonlinear predictor adaptive robust control (PARC) is proposed to track a desired state trajectory. The controller uses predictor-based model compensation to attenuate the effect of input time-delay, gradient type projection with prediction-based learning mechanisms to reduce the parameter uncertainties, and prediction-based nonlinear robust feedback to attenuate the effect of model approximation errors and disturbances, simultaneously. The controller guarantees a prescribed transient performance (with global exponential convergence) and …
Datumate, Purdue Ect Team
Datumate, Purdue Ect Team
ECT Fact Sheets
Datumate is digitally transforming civil engineering processes used in construction, surveying and infrastructure inspection markets with fully automated, highly precise, cost effective and safe tools. It utilizes state-of-the-art image processing and advanced drones and camera technologies dramatically reducing the amount of time surveying crews spend in the field, speeding up construction progress checks and shortening infrastructure inspection duration, while maintaining survey grade accuracy. The intuitive, simple and automated solutions increase productivity by saving field and office time in civil engineering and inspection projects of roads, intersections, stockpile volumes, topography, piping, industrial facilities, bridges, property surveys, building facades, railways, cellular infrastructure …
Molecular Structure And Confining Environment Of Sn Sites In Single-Site Chabazite Zeolites, James W. Harris, Wei-Chih Liao, John R. Di Iorio, Alisa M. Henry, Ta-Chung Ong, Aleix Comas-Vives, Christopher Coperet, Rajamani Gounder
Molecular Structure And Confining Environment Of Sn Sites In Single-Site Chabazite Zeolites, James W. Harris, Wei-Chih Liao, John R. Di Iorio, Alisa M. Henry, Ta-Chung Ong, Aleix Comas-Vives, Christopher Coperet, Rajamani Gounder
School of Chemical Engineering Faculty Publications
Chabazite (CHA) molecular sieves, which are industrial catalysts for the selective reduction of nitrogen oxides and the conversion of methanol into olefins, are also ideal materials in catalysis research because their crystalline frameworks contain one unique tetrahedral-site. The presence of a single lattice site allows for more accurate descriptions of experimental data using theoretical models, and consequently for more precise structure-function relationships of active sites incorporated into framework positions. A direct hydrothermal synthesis route to prepare pure-silica chabazite molecular sieves substituted with framework Sn atoms (Sn-CHA) is developed, which is required to predominantly incorporate Sn within the crystalline lattice. Quantitative …
New Fractals For Computer Generated Art Created By Iteration Of Polynomial Functions Of A Complex Variable, Charles F. Babbs
New Fractals For Computer Generated Art Created By Iteration Of Polynomial Functions Of A Complex Variable, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Working Papers
Novel fractal forms can be created by iteration of higher order polynomials of the complex variable, z, with both positive and negative exponents, followed by optional integer power transformation, k zz . Such functions lead to an expanded universe of fascinating fractal patterns that can be incorporated into computer generated art.
Generalized Fractals For Computer Generated Art: Preliminary Results, Charles F. Babbs
Generalized Fractals For Computer Generated Art: Preliminary Results, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Working Papers
This paper explores new types of fractals created by iteration of the functions xn+1 = f1(xn, yn) and yn+1 = f2(xn, yn) in a general plane, rather than in the complex plane. Iteration of such functions generates orbits with novel fractal patterns. Especially interesting are N-th order polynomials, raised to a positive or negative integer power, p.
Such functions create novel fractal patterns, including budding, spiked, striped, dragon head, and bat-like forms. The present faculty working paper shows how to create a rich variety of complex and fascinating fractals using this generalized approach, which is accessible to students with high …
An Automated Workflow For Quantifying Rna Transcripts In Individual Cells In Large Data-Sets, Matthew C. Pharris, Tzu-Ching Wu, Xinping Chen, Xu Wang, David M. Umulis, Vikki M. Weake, Tamara L. Kinzer-Ursem
An Automated Workflow For Quantifying Rna Transcripts In Individual Cells In Large Data-Sets, Matthew C. Pharris, Tzu-Ching Wu, Xinping Chen, Xu Wang, David M. Umulis, Vikki M. Weake, Tamara L. Kinzer-Ursem
Weldon School of Biomedical Engineering Faculty Publications
Advanced molecular probing techniques such as single molecule fluorescence in situ hybridization (smFISH) or RNAscope can be used to assess the quantity and spatial location of mRNA transcripts within cells. Quantifying mRNA expression in large image sets usually involves automated counting of fluorescent spots. Though conventional spot counting algorithms may suffice, they often lack high-throughput capacity and accuracy in cases of crowded signal or excessive noise. Automatic identification of cells and processing of many images is still a challenge. We have developed a method to perform automatic cell boundary identification while providing quantitative data about mRNA transcript levels across many …
Influence Of Adsorbed And Nonadsorbed Polymer Additives On The Viscosity Of Magnesium Oxide Suspensions, Lisa R. Murray, Jason E Bice, Emily G. Soltys, Christopher Perge, Sebastien Manneville, Kendra Erk
Influence Of Adsorbed And Nonadsorbed Polymer Additives On The Viscosity Of Magnesium Oxide Suspensions, Lisa R. Murray, Jason E Bice, Emily G. Soltys, Christopher Perge, Sebastien Manneville, Kendra Erk
School of Materials Engineering Faculty Publications
Adsorbed polymer additives have been employed to reduce water content and improve cement workability through lowering viscosity, but the influence of over-dosage and the presence of nonadsorbed chains have yet to be fully understood. Model magnesium oxide (MgO) suspensions were used to investigate the potential processing effect of “free” chain concentration on cementitious mixtures. The rheological impact of the free chains was measured through incorporation of nonadsorbing poly(ethylene glycol) (PEG) to suspensions stabilized with an adsorbed comb-polymer superplasticizer. Analyses of the rheological data, that showed viscosity-increases and viscosity-reduction due to free PEG concentrations revealed a transition from depletion flocculation to …
Technology To Manufacture Oriented Pvc (Pvc-O) Pipes, Purdue Ect Team
Technology To Manufacture Oriented Pvc (Pvc-O) Pipes, Purdue Ect Team
ECT Fact Sheets
The development of Molecor´s technology, which is based on the application of a Molecular Orientation process, has delivered a significant turning point in the pipelines sector. With this technological development, the company has begun to manufacture TOM® PVC-O pipes, the most eco-friendly pipes on the market. The Molecor technology enabled eradicating many of the existing disadvantages of thermoplastic pipes.
This technology delivers a clear objective; to provide the water industry with a solution for pipes carrying pressurized water in an environmentally friendly, yet cost efficient manner. This also extends a service life compared to pipeline materials currently in use.
The …
Biomechanics Of Snoring And Sleep Apnea, Charles F. Babbs
Biomechanics Of Snoring And Sleep Apnea, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Working Papers
To understand the mechanisms of snoring and sleep apnea a first-principles biomechanical analysis was done for airflow through branched parallel channels, separated by a freely movable soft palate, and converging to a common channel at the base of the tongue in a “Y-shaped” configuration. Branches of the Y describe slit-like passages on the nasal and oral sides of the soft palate, when the palate is pushed by backward movement of the tongue to form a wedge between the tongue surface and the posterior pharyngeal wall. The common channel of the Y describes the oropharyngeal passage between the base of the …
An Operationalized Model For Defining Computational Thinking, Tony A. Lowe, Sean B. Brophy
An Operationalized Model For Defining Computational Thinking, Tony A. Lowe, Sean B. Brophy
School of Engineering Education Graduate Student Series
The Computational Thinking (CT) conceptual framework is entering its second decade of research yet still lacks a cohesive definition by which the field can coalesce. The lack of clear definition makes assessment tool challenging to formulate, pedagogical efforts difficult to compare, and research difficult to synthesize. This paper looks to operationalize differing definitions of CT enhancing the ability to teach then assess the presence of CT. Expanding upon CT definitions, industry practices and processes, and educational theory, we link existing concepts and propose a new element to model an active definition of CT as a theoretical framework to guide future …
Understanding The Impact Of Strategic Team Formation In Early Programming Education, Tony A. Lowe, Sean B. Brophy
Understanding The Impact Of Strategic Team Formation In Early Programming Education, Tony A. Lowe, Sean B. Brophy
School of Engineering Education Graduate Student Series
This evidence based research looks at the impact of a team-based instruction on learning to program in a first year engineering course designed under the Bauhaus studio model. Each team is formulated with a “more knowledgeable other” [1], or for this paper the “ringer” based on selfreported prior learning. The ringer is intended to support the team through early programming challenges. In addition to the professor and teaching assistants, having a peer mentor can yield higher satisfaction and confidence in learners [2]. Our analysis evaluates learning outcomes as student progress through the term, comparing performance based on the performance and …
A Systematized Literature Review: Defining And Developing Engineering Competencies, Hossein Ebrahiminejad
A Systematized Literature Review: Defining And Developing Engineering Competencies, Hossein Ebrahiminejad
School of Engineering Education Graduate Student Series
Essential competencies have been identified for engineers working in industry. These competencies include (but are not limited to) critical thinking, problem-solving, teamwork, and communication. Engineering education research has shown, however, that engineering undergraduate students often fail to develop these crucial competencies. The industry has also noted that recent graduates exhibit competency gaps. To address these gaps, it is important for higher education institutions to seek to understand the competencies identified as necessary in the industry. Moreover, one could argue educational institutions should develop and assess students’ competencies based on these professional demands. This research systematically reviews literature related to this …
Board # 113 : Eegrc Poster: Characterizing Trade-Off Decisions In Student Designers, Molly Goldstein
Board # 113 : Eegrc Poster: Characterizing Trade-Off Decisions In Student Designers, Molly Goldstein
School of Engineering Education Graduate Student Series
Although design and decision-making are intertwined for practicing engineers, students from elementary school through college and graduate schools are not taught to think through uncertain situations (Howard, 2007) in which information is limited or outcomes are not guaranteed. Trade-offs are a complex element of decision, as the decision-making weighs possible outcomes against their respective costs (Otto &Antonsson, 1991). Although much is understood about how professional designers’ behaviors as compared to novice designers and students (Atmen et al., 2007; Crismond & Adams, 2012; Cross, 2003), there is little research regarding making trade-off decisions from middle school and high school to college. …
Concise Handbook For Temporary Traffic Control - Construction, Maintenance, And Utility Operations, Indiana Ltap, Ohio Department Of Transportation
Concise Handbook For Temporary Traffic Control - Construction, Maintenance, And Utility Operations, Indiana Ltap, Ohio Department Of Transportation
Indiana Local Technical Assistance Program (LTAP) Publications
This handbook gives the basic principles and provides examples for the design, application, installation, and maintenance of the various types of traffic control devices used in temporary traffic control or for incident management. Traffic control in roundabouts has been included in this version. The guidelines presented are in accordance with the standards provided within the Indiana Manual for Uniform Traffic Control Devices (IMUTCD). This handbook is based upon one created by the Ohio Department of Transportation, Guidelines for Traffic Control in Work Zones. Indiana LTAP expresses thanks to ODOT for their permission to reprint this material.
Climate, Weather, Socio-Economic And Electricity Usage Data For The Residential And Commercial Sectors In Fl, U.S, Sayanti Mukherjee, Roshanak Nateghi
Climate, Weather, Socio-Economic And Electricity Usage Data For The Residential And Commercial Sectors In Fl, U.S, Sayanti Mukherjee, Roshanak Nateghi
School of Industrial Engineering Faculty Publications
This paper presents the data that is used in the article entitled “Climate sensitivity of end-use electricity consumption in the built environment: An application to the state of Florida, United States” (Mukhopadhyay and Nateghi, 2017) [1]. The data described in this paper pertains to the state of Florida (during the period of January 1990 to November 2015). It can be classified into four categories of (i) state-level electricity consumption data; (ii) climate data; (iii) weather data; and (iv) socio-economic data. While, electricity consumption data and climate data are obtained at monthly scale directly from the source, the weather data was …
Netpoint®, Purdue Ect Team
Netpoint®, Purdue Ect Team
ECT Fact Sheets
The vast majority of construction scheduling software uses a combination of spreadsheets and Gantt charts for developing and depicting Critical Path Method (CPM) schedules. While this paradigm works for the expert scheduler, it is not conducive to collaboration, and it is prohibitively difficult for non-scheduling experts to understand.
NetPoint® provides a dynamic, visual interface conducive to touch and gestural input. Activities are drawn directly on a time-scale and may be placed on the same row or arranged automatically using codes or the WBS. Such control of the presentation makes it easier to communicate the plan to any type of audience. …
Fluid Isolator, Purdue Ect Team
Fluid Isolator, Purdue Ect Team
ECT Fact Sheets
The reliability of concrete infrastructure is vital to ensuring daily life, as well as commerce, can progress without interruption. From the pavement of interstate highways to the driveways and sidewalks in a local neighborhood, concrete is expensive to install and often even more expensive, and intrusive, when it needs to be replaced. Unfortunately, to maintain functionality in winter climates concrete is heavily exposed to deicing salts. This not only affects the roads, driveways, and sidewalks where salt is applied directly, but many other areas such as parking and residential garages where vehicles (and people) will track salt along with water …
Development, Testing And Implementation Of Traffic Signal Performance Measures At A Local Governmental Agency, Jay Alan Grossman
Development, Testing And Implementation Of Traffic Signal Performance Measures At A Local Governmental Agency, Jay Alan Grossman
Indiana Local Technical Assistance Program (LTAP) Technical Reports
The testing and implementation of traffic signal performance measures at a local government agency revolves around three main performance measures: signal detector anomaly identification, signal split failures reports and red light running identification. Signal detector anomaly identification used the Kolmogorov-Smirnov test to compare current and past detector operation and was shown to be effective in identification of anomalies. Three different types of split failure reports were utilized to determine operational issues on signal systems. Long-term longitudinal, corridor scale, and single intersection split failure reports were implemented on active signal systems and found to be effective in determining and correcting problems. …
Smartvid.Io, Purdue Ect Team
Smartvid.Io, Purdue Ect Team
ECT Fact Sheets
The collection, organization, and retrieval of industrial media is a pervasive challenge that is especially glaring for companies in the AEC industry. Construction projects often generate large volumes of pictures & videos from the field for tracking progress and communicating between engineers, contractors, and subcontractors. It is not uncommon for field personnel to capture hundreds of photos per week on any given jobsite.
Smartvid.io is a cloud-based software solution designed for the specific needs of industrial media. The application’s internal deep-learning engines, collectively nicknamed VINNIE (for ‘Very Intelligent Neural Network for Insight and Evaluation’), use speech and image recognition to …
X650f Power Enhancement, Joseph Reed, Joe Lund, Donald Yu, Jessica Iglesias, Daniel Ewell
X650f Power Enhancement, Joseph Reed, Joe Lund, Donald Yu, Jessica Iglesias, Daniel Ewell
Aviation Technology Undergraduate Student Research
This proposal seeks to define the purpose, goals, and scope of the X650F Power Enhancement project. Five members of Purdue’s Aeronautical Engineering Technology program are leading this project as part of their senior capstone research course. The purpose of said project is to look into the many possibilities of enhancing the Unmanned Aerial Vehicle (UAV) power supply. This can open doors to several opportunities that can benefit both the Unmanned Aerial Systems (UAS) program here at Purdue University, as well as the all of the students expected to go into the industry. The ideas looked into include, but are not …
X650f Power Solution, Joseph Reed, Joe Lund, Donald Yu, Jessica Iglesias, Daniel Ewell
X650f Power Solution, Joseph Reed, Joe Lund, Donald Yu, Jessica Iglesias, Daniel Ewell
Aviation Technology Undergraduate Student Research
This poster presents the problem of how that students coming out of the UAV minor and major are not getting enough flight time in the starting courses such as AT 209 and AT 219. Due to this, they are not as prepared as they should be for the higher level courses such as AT 309 and AT 319. Our end goal is to somehow increase the level of flight time in the earlier courses so that they can be prepared and ready for the next level courses.
Hillman Composite Beam (Hcb®), Purdue Ect Team
Hillman Composite Beam (Hcb®), Purdue Ect Team
ECT Fact Sheets
The Hillman-Composite Beam (HCB®), is an innovative structural member for use in highway and railroad bridges as well as marine facilities. The HCB is essentially a lightweight reinforced concrete beam strengthened and protected by a corrosion-resistant and resilient Fiberglass Reinforced Polymer (FRP) shell.
The beam is comprised of three main components, a concrete arch (compression reinforcement), an FRP bottom flange encapsulating steel strands tying the ends of the arch together (tension reinforcement) and the FRP shell. Galvanized Rebar “shear connectors” are used to make the beam composite with the concrete deck in the same manner as pre-stressed concrete beams.
The …
A Pilot “Big Data” Education Module Curriculum For Engineering Graduate Education: Development And Implementation, Megan R. Sapp Nelson, Line C. Pouchard
A Pilot “Big Data” Education Module Curriculum For Engineering Graduate Education: Development And Implementation, Megan R. Sapp Nelson, Line C. Pouchard
Libraries Faculty and Staff Scholarship and Research
Projects in engineering higher education increasingly produce data in the volume, variety, velocity, and need for veracity such that the output of the research is considered “Big Data”. While engineering faculty members do conceive of and direct the research producing this data, there may be gaps in faculty members’ knowledge in training graduate and undergraduate research assistants in the practical management of Big Data. The project described in this research paper details the development of a Big Data education module for graduate researchers in Electrical and Computer Engineering. The project has the following objectives: to document and describe current data …
Industrial-Grade Monitoring Solution: Hoistcam, Purdue Ect Team
Industrial-Grade Monitoring Solution: Hoistcam, Purdue Ect Team
ECT Fact Sheets
Safety and productivity are top priorities for contractors and industrial operations. Improving either makes a company more profitable and competitive. Technology advancements that can do both are important for every company to consider. HoistCamTM industrial-grade video monitoring solutions can improve employees’ productivity and workplace safety in the construction industries. HoistCam also improves efficiency of operations and reduces job site accidents resulting in substantial cost savings to a contractor.
HoistCam™ is an integrated, wireless video system. The use of HoistCam eliminates blind lifts, blind spots and can share the live video with anyone, anywhere with solid security and easy control. …
Performance Assessment Of Natural Pozzolan Roller Compacted Concrete Pavements, Seyedali Ghahari, A Mohammadi, A A. Ramezanianpour
Performance Assessment Of Natural Pozzolan Roller Compacted Concrete Pavements, Seyedali Ghahari, A Mohammadi, A A. Ramezanianpour
Lyles School of Civil Engineering Faculty Publications
Concrete pavement is cost effective and beneficial because of its sustainability and durability. The maintenance and renovation periods for such pavement compared to other pavements are relatively long; however, a significant issue with pavements, especially roller compacted concrete pavements (RCCP), is salt scaling which occurs due to saline solutions such as deicer salts. In the present work, the performance of RCC containing a natural pozzolan called Trass, as a supple- mentary cementitious material, and an air-entraining agent for salt scaling was investigated. Mechanical and durability tests were performed on specimens containing a water to binder ratio of 0.32, with and …