Engineering Commons^™

Clustering Of Rapidly Settling, Low-Inertia Particle Pairs In Isotropic Turbulence. Part 1. Drift And Diffusion Flux Closures, Sarma L. Rani, Vijay K. Gupta, Donald L. Koch

PRC-Affiliated Research

In this two-part study, we present the development and analysis of a stochastic theory for characterizing the relative positions of monodisperse, low-inertia particle pairs that are settling rapidly in homogeneous isotropic turbulence. In the limits of small Stokes number and Froude number such that , closures are developed for the drift and diffusion fluxes in the probability density function (p.d.f.) equation for the pair relative positions. The theory focuses on the relative motion of particle pairs in the dissipation regime of turbulence, i.e. for pair separations smaller than the Kolmogorov length scale. In this regime, the theory approximates the fluid …

Clustering Of Rapidly Settling, Low-Inertia Particle Pairs In Isotropic Turbulence. Part 2. Comparison Of Theory And Dns, Sarma L. Rani, Rohit Dhariwal, Donald L. Koch

PRC-Affiliated Research

Part 1 (Rani et al. J. Fluid Mech. , vol. 871, 2019, pp. 450–476) of this study presented a stochastic theory for the clustering of monodisperse, rapidly settling, low-Stokes-number particle pairs in homogeneous isotropic turbulence. The theory involved the development of closure approximations for the drift and diffusion fluxes in the probability density function (p.d.f.) equation for the pair relative positions $\boldsymbol{r}$ . In this part 2 paper, the theory is quantitatively analysed by comparing its predictions of particle clustering with data from direct numerical simulations (DNS) of isotropic turbulence containing particles settling under gravity. The simulations were performed at …

Microwave Reflectometry For Physical Inspections, Mohammad Tayeb Ahmad Ghasr, R. Zoughi, Satyajeet Shinde, Sasi Jothibasu

Electrical and Computer Engineering Faculty Research & Creative Works

Utilizing microwave reflections to compare a reference device with counterfeit and/or aging devices under test. The reflection from the device under test varies based on certain properties, which results in each device having a unique and intrinsic electromagnetic signature. Comparisons of the electromagnetic signature of the device under test to the electromagnetic signature of a reference device enable evaluating the acceptability of the device under test.

Keeping Your Library Relevant For Your Users- Engine Parts Petting Zoo, Gabriele Hysong

Midwest Business Librarian Summit (MBLS)

As corporate libraries are downsized or even closed how do information professionals keep their libraries relevant?

Fire Safety Of Rectangular Hollow Section (Rhs) Truss Members With Local Imperfections, Luke Bailey

The Plymouth Student Scientist

This project investigates the effect of local imperfections on RHS truss members at elevated temperatures. The specific model used represents a realistic example of a RHS practical application and shows that local imperfections can have a detrimental effect on overall compressive resistance. Modelling showed that above 400C, a member with a local imperfection will experience global buckling and failure significantly quicker than a member without. In consequence, this paper concludes that all slender RHS members that are defined as a key element should be given suitable fire protection.

The Design And Implementation Of Aida: Ancient Inscription Database And Analytics System, M. Parvez Rashid

School of Computing: Dissertations, Theses, and Student Research

AIDA, the Ancient Inscription Database and Analytic system can be used to translate and analyze ancient Minoan language. The AIDA system currently stores three types of ancient Minoan inscriptions: Linear A, Cretan Hieroglyph and Phaistos Disk inscriptions. In addition, AIDA provides candidate syllabic values and translations of Minoan words and inscriptions into English. The AIDA system allows the users to change these candidate phonetic assignments to the Linear A, Cretan Hieroglyph and Phaistos symbols. Hence the AIDA system provides for various scholars not only a convenient online resource to browse Minoan inscriptions but also provides an analysis tool to explore …

Mid To Late Season Weed Detection In Soybean Production Fields Using Unmanned Aerial Vehicle And Machine Learning, Arun Narenthiran Veeranampalayam Sivakumar

Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research

Mid-late season weeds are those that escape the early season herbicide applications and those that emerge late in the season. They might not affect the crop yield, but if uncontrolled, will produce a large number of seeds causing problems in the subsequent years. In this study, high-resolution aerial imagery of mid-season weeds in soybean fields was captured using an unmanned aerial vehicle (UAV) and the performance of two different automated weed detection approaches – patch-based classification and object detection was studied for site-specific weed management. For the patch-based classification approach, several conventional machine learning models on Haralick texture features were …

Bulbous Pier: An Alternative To Bridge Pier Extension As A Countermeasure Against Bridge Deck Splashing, Moses Karakouzian, Amilcar Chavez, Donald Hayes, Mohammad Nazari-Sharabian

Civil and Environmental Engineering and Construction Faculty Research

Bridge deck splashing causes deterioration to a bridge’s structure and renders the bridge unsafe for motorists and pedestrians. The traditional countermeasure for bridge deck splashing has been pier extension. Pier extensions move the pier wave and the associated splash away from the bridge deck, but retrofitting existing bridges with pier extensions is costly. This research evaluates the use of a bulbous added to the pier as an alternative to pier extension. A bulb placed on the upstream side of a bridge pier affects the splashing. The energy in the passing water is redirected from the impact by streamlining the flow. …

Data Sheet For Cone Penetration Test In Soil-Bentonite Cutoff Wall, Jeffrey C. Evans

NSF Soil-Bentonite Slurry Trench Cutoff Wall Datasets

This data sheet shows the measurements taken using a cone penetration test in a soil-bentonite slurry trench cutoff wall. The testing was done following ASTM D 3441.

Fine Sediment Modeling During Storm-Based Events In The River Bandon, Ireland, Juan T. Garcia, Joseph R. Harrington

Publications

The River Bandon located in County Cork (Ireland) has been time-continuously monitored by turbidity probes, as well as automatic and manual suspended sediment sampling. The current work evaluates three different models used to estimate the fine sediment concentration during storm-based events over a period of one year. The modeled suspended sediment concentration is compared with that measured at an event scale. Uncertainty indices are calculated and compared with those presented in the bibliography. An empirically-based model was used as a reference, as this model has been previously applied to evaluate sediment behavior over the same time period in the River …

Functional Porous Polydimethlysiloxane As Piezoresistive And Piezoelectric Materials, Taissa Rose Michel

Theses and Dissertations

In this paper, polydimethylsiloxane (PDMS), carbon nanotubes (CNTs), and zinc oxide (ZnO) were combined to create functionalized piezoresistive and piezoelectric sensors for pressure sensing and energy harvesting. Samples were foamed to show that the increased deformability of the foam sensors makes them suitable for a range of applications including dexterous robotics, tactile sensing, energy harvesting, and biosensing. Uniform dispersion of CNTs was achieved with chloroform as the solvent. Samples were foamed using chemical blowing and scaffolding but granulated sugar at 70% porosity resulted in foamed samples with the most consistent mechanical properties. Samples underwent tensile and compressive testing for their …

Thermal Interface Material, Matthew Collins Weisenberger, John Davis Craddock

Center for Applied Energy Research Faculty Patents

A flexible sheet of aligned carbon nanotubes includes an array of aligned nanotubes in a free standing film form not adhered to the synthesis substrate, with a matrix infiltrated interstitially into the nanotube array with access to the nanotube tips from both the top and bottom. That is, the infiltrant is purposely limited from over-filling or coating one or both exterior top and/or bottom surfaces of the array, blocking access to the tips. A typical matrix is a polymer material.

Design Of Personnel Big Data Management System Based On Blockchain, Houbing Song, Jian Chen, Zhihan Lv

Publications

With the continuous development of information technology, enterprises, universities and governments are constantly stepping up the construction of electronic personnel information management system. The information of hundreds of thousands or even millions of people’s information are collected and stored into the system. So much information provides the cornerstone for the development of big data, if such data is tampered with or leaked, it will cause irreparable serious damage. However, in recent years, electronic archives have exposed a series of problems such as information leakage, information tampering, and information loss, which has made the reform of personnel information management more and …

Thermostable Lyoprotectant-Enhanced Cell-Free Protein Synthesis For On-Demand Endotoxin-Free Therapeutic Production, Kristen M. Wilding, Emily Long Zhao, Conner C. Earl, Bradley Charles Bundy

Faculty Publications

Cell-free protein synthesis has emerged as a promising platform for the production of therapeutic proteins due to its inherently open reaction environment, flexible reaction conditions and rapid protein synthesis capabilities. In recent years, lyophilized cell-free systems have widened the application space of cell-free technology by improving reagent stability outside of cold-chain storage. Current embodiments of the system, however, demonstrate poor stability at elevated temperatures. Lyoprotectants have long been recognized for the ability to preserve the activity of biological molecules during drying processes, but the application of this technology to lyophilized cell-free systems has been limited and has failed to address …

Fiber Optic Bolometer, Ming Han, Matthew L. Reinke

Department of Electrical and Computer Engineering: Faculty Publications

The present disclosure is directed to a fiber optic bolometer device . In an implementation , a fiber optic bolometer device includes an optical fiber and a silicon layer that comprises a Fabry - Perot interferometer . The silicon layer includes a first surface and a second surface . The fiber optic bolometer device includes a reflective dielectric film disposed over the first surface of the silicon layer where the reflective dielec tric film is adjacent to an end face of the optical fiber . The fiber optic bolometer device also includes an absorptive coating disposed over the second surface …

Heat Set Creases In Polyethylene Terephthalate (Pet)Sheets To Enable Origami-Based Applications, Larry L. Howell, Nathan C. Brown, Brandon S. Sargent, Brian D. Jensen, Spencer P. Magleby, William G. Pitt

ScholarsArchive Data

This data set includes the raw data from the tests described in the research paper “Heat Set Creases in Polyethylene Terephthalate (PET) Sheets to Enable Origami-Based Applications” by Brandon Sargent, Nathan Brown, Brian D. Jensen, Spencer P. Magleby, William G. Pitt, and Larry L. Howell.

Approximate Pattern Matching Using Hierarchical Graph Construction And Sparse Distributed Representation, Aakanksha Mathuria, Dan Hammerstrom

Electrical and Computer Engineering Faculty Publications and Presentations

With recent developments in deep networks, there have been significant advances in visual object detection and recognition. However, some of these networks are still easily fooled/hacked and have shown “bag of features” failures. Some of this is due to the fact that even deep networks make only marginal use of the complex structure that exists in real-world images, even after training on huge numbers of images. Biology appears to take advantage of such a structure, but how? In our research, we are studying approaches for robust pattern matching using still, 2D Blocks World images based on graphical representations of the …

System Integration Of C-Arm Robotic Prototype Using Motion Capture Guidance For Accurate Repositioning, Alireza Yazdanshenas

Mechanical Engineering Theses

One of the important surgical tools in spinal surgery is the C-Arm X-ray System. The C-Arm is a large “C” shaped and manually maneuvered arm that provides surgeons and X-ray technicians the ability to take quick quality X-rays during surgery. Because of its five degrees of freedom, the C-Arm can be manually maneuvered around the patient to provide many angles and perspectives, ensuring surgical success.

This system works fine for most surgical procedures but falls short when the C-Arm must be moved out of the way for complicated surgical procedures.

The aim of this thesis is to develop an accurate …

3d Plasmonic Design Approach For Efficient Transmissive Huygens Metasurfaces, Bryan M. Adomanis, D. Bruce Burckel, Michael A. Marciniak

Faculty Publications

In this paper we present a design concept for 3D plasmonic scatterers as high- efficiency transmissive metasurface (MS) building blocks. A genetic algorithm (GA) routine partitions the faces of the walls inside an open cavity into a M x N grid of voxels which can be either covered with metal or left bare, and optimizes the distribution of metal coverage needed to generate electric and magnetic modes of equal strength with a targeted phase delay (Φt) at the design wavelength. Even though the electric and magnetic modes can be more complicated than typical low order modes, with their spectral overlap …

Design, Development, And Field Testing A Visnir Integrated Multi-Sensing Soil Penetrometer, Nuwan K. Wijewardane

Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research

The research community in soil science and agriculture lacks a cost-effective and rapid technology for in situ, high resolution vertical soil sensing. Visible and near infra-red (VisNIR) technology has the potential to be used for such sensor development due to its ability to derive multiple soil properties rapidly using a single spectrum. Such efforts must, however, overcome a few challenges: (i) a dry ground soil spectral library that can be used to predict the target soil properties accurately, (ii) a robust design which can acquire high quality VisNIR spectra of soil, (iii) an effective method that can link field intact …

Multidirectional Pin-On-Disk Testing Device To Evaluate The Cross-Shear Effect On The Wear Of Biocompatible Materials, Vicente Cortes, Carlos A. Rodriguez Betancourth, Javier A. Ortega, Hasina Huq

Mechanical Engineering Faculty Publications

One of the main causes of hip prostheses failure is the premature wear of their components. Multi-directional motion or “cross-shear” motion has been identified as one of the most significant factors affecting the wear rate of UHMWPE in total hip joint replacement prostheses. To better evaluate the effect of this cross-shear motion on the tribological behavior of different biomaterials, a new wear testing device has been designed and developed. This new instrument is capable to reproduce the “cross-shear” effect with bidirectional motion on bearing materials and to determine coefficient of friction (COF) between surfaces during testing. To validate the functionality …

Integrating Field Monitoring And Numerical Modeling To 3 Evaluate Performance Of A Levee Under 4 Climatic And Tidal Variations, Xavier A. Rivera-Hernandez, Ghada Ellithy, Farshid Vahedifard

Publications

Several short-duration and extreme hydraulic loadings impose time-dependent variably saturated seepage conditions on earthen 7 slopes and embankments. Difficulty assigning appropriate input parameters and lack of full-scale validation are among the main factors 8 introducing uncertainty and lack of confidence when performing numerical transient seepage analysis. This case study demonstrates how 9 to effectively use field-monitoring data to improve the numerical analysis of a levee under climatic and tidal variations. The case study 10 includes a silty sand setback levee located near Seattle. An array of tensiometers and soil moisture sensors installed within the levee’s embank11 ment and foundation, along …

Numerical Solution Of The Equation Of Seismic Vibration Of Complex Nodes Of Underground Structures In Earthquakes, U. Khalbutayev

Problems of Architecture and Construction

In this article, we study the numerical solution of the equations of motion of seismic-dynamic problems of complex knots of underground structures containing the Duhamel integral using the trapezoid and Simpson methods. To obtain numerical results, single seismic pulses and tabulated accelerogram values of the devastating Gazli earthquake are used. Investigation of the voltage and displacement, side pipes relative to the ground in the vicinity of complex nodes. Important conclusions have been made regarding the seismic resistance of complex assemblies and side pipes during earthquakes.

Strength Of Reinforced Concrete Beams Hardenedwith High-Strength Polymers, N Asatov, U. Jurayev, B. Sagatov

Problems of Architecture and Construction

The article reflects the methodology, results and features of the studies conducted to assess the strength of rectangular reinforced concrete beams in transverse bending. The technique of using high-strength polymer composites to reinforce reinforced concrete elements is shown. The characteristics of the tested samples, testing methods, the effect of the main factors affecting the strength of the beams are also discussed.

Study Of Old Padjakent Sugd Zoroastrism Temples As An Object Of Researches, D. Kamalova, Kh. Khaldarova

Problems of Architecture and Construction

The article summarizes the experience of the archaeological findings of the ancient Penjikent. In Sogd, a special type of buildings was developed, influenced by the architectural traditions of Bactria-Tokharistan, which, in turn, are closely linked to the cultural heritage of Greece and the ancient Near East. This allows us to consider the history of Sogdian temples an integral part of the history of world architecture.

Reactions Of Underground Pipelines Under The Action Of Damped Harmonic And Impulsive Influences, D. Bekmirzayev, N. Nishonov, R. Kishanova, Sh. Turdikulov

Problems of Architecture and Construction

The article investigates underground pipelines under the action of damped harmonic and impulsive effects. The stress-strain state of underground pipelines and the propagation of seismic waves in underground pipelines are given.

Water Softening With Reverse Osmosis And Ultrafiltrations, O. Jurayev, D. Sobirova

Problems of Architecture and Construction

The study covered the analysis of the elimination of hardness to natural water and its adverse effects on humans and equipment. Especially the northern areas of the Samarkand, Bukhara and Navai regions of the Republic of Uzbekistan, the problems of groundwater hardness, their softening, the use of reverse osmosis and ultrafiltration, which are the newest physic-chemical methods, and the use of dynamic membranes to improve the performance of these problems.

Features Of National Standards For Calculation Of Seismic Resistance Of Buildings And Structures, A. Klebleyev, E. Klebleyev

Problems of Architecture and Construction

The article depicts the basic calculation formulas for determining the horizontal component of the seismic impact of domestic and foreign standards in the construction of seismic areas. Accumulated in the process of deformation of compressed rock massifs, the potential energy in places where the internal forces exceed the frictional forces passes into the kinetic force, which leads to an earthquake.

The Role Of Technical Customer-Engineering Company In The Implementation Of Construction Projects, A. Lapidus, D. Topchiy

Problems of Architecture and Construction

The conceptual functions of a technical customer are considered, the companies analogous to which outside the Russian Federation are engineering companies. The two most common schemes of technical customer participation in the construction of the facility are presented, ensuring the successful implementation of the project.

Automated Calculation Of Steel Truss With Overhead Cranes, Sh. Turakulova, G. Freedman

Problems of Architecture and Construction

The article discusses an example of calculating a steel construction farm with a span of 30 m using the LIRA 9.6 software package. The sequence of actions for entering the initial data, calculating the farm and analyzing the results of the calculation is displayed.