Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

156,792 Full-Text Articles 183,907 Authors 56,080,941 Downloads 322 Institutions

All Articles in Engineering

Faceted Search

156,792 full-text articles. Page 2 of 4633.

Poultry Farm Security Gate: Autonomous Vehicle Recognition System, Kaitlyn M. Nelms, Mary A. Morris 2020 University of Tennessee, Knoxville

Poultry Farm Security Gate: Autonomous Vehicle Recognition System, Kaitlyn M. Nelms, Mary A. Morris

Biosystems Engineering and Soil Science Publications and Other Works

This project addresses the lack of security on access roads to broiler poultry farms in Tennessee by creating a system that autonomously recognizes vehicles as they approach the farm property. Many of these farms lack gates with proper security, making them vulnerable to vandalism and risking their biosecurity. Allowing all feed trucks entry to the farms is a vital requirement of the design in order to avoid interrupting operations on the farm. To address this issue, this project utilizes a combination of automated license plate reading software and light detection and ranging sensors (LiDAR) to autonomously recognize a vehicle and ...


A Statistical Impulse Response Model Based On Empirical Characterization Of Wireless Underground Channel, Abdul Salam, Mehmet C. Vuran, Suat Irmak 2020 Purdue University

A Statistical Impulse Response Model Based On Empirical Characterization Of Wireless Underground Channel, Abdul Salam, Mehmet C. Vuran, Suat Irmak

Faculty Publications

Wireless underground sensor networks (WUSNs) are becoming ubiquitous in many areas. The design of robust systems requires extensive understanding of the underground (UG) channel characteristics. In this paper, an UG channel impulse response is modeled and validated via extensive experiments in indoor and field testbed settings. The three distinct types of soils are selected with sand and clay contents ranging from $13\%$ to $86\%$ and $3\%$ to $32\%$, respectively. The impacts of changes in soil texture and soil moisture are investigated with more than $1,200$ measurements in a novel UG testbed that allows flexibility in soil moisture control. Moreover ...


3-D Printed Hybrid Propulsion Solutions For Smallsat Lunar Landing And Sample Return, Stephen A. Whitmore 2020 Utah State University

3-D Printed Hybrid Propulsion Solutions For Smallsat Lunar Landing And Sample Return, Stephen A. Whitmore

Funded Research Records

No abstract provided.


Enhancing Facility Management For Existing Facilities With Building Information Modeling, Ryan Loeh 2020 Rowan University

Enhancing Facility Management For Existing Facilities With Building Information Modeling, Ryan Loeh

Theses and Dissertations

Building information modeling (BIM) refers to the process of creating a comprehensive three-dimensional (3D) model that allows for a seamless transition from design and construction to operation & maintenance during a building's lifecycle. While a majority of past research for building information modelling was focused on design and construction, research has shifted to operation, maintenance and renovation. This study investigates the feasibility of integrating BIM (Autodesk Revit) and facility management (BUILDER SMS). BUILDER SMS is currently used at the sponsor's facilities to encourage proactive maintenance and provide updated condition assessments. While both datasets have their own benefits, this study ...


A Microfluidic Platform For High-Throughput Screening Of Aquaporin Performance, Adriana Del Pino Herrera, Jordan Hoydick, Rachel Rauh, Elyssa El-hajj, Madison Burchfield 2020 Duquesne University

A Microfluidic Platform For High-Throughput Screening Of Aquaporin Performance, Adriana Del Pino Herrera, Jordan Hoydick, Rachel Rauh, Elyssa El-Hajj, Madison Burchfield

Undergraduate Research and Scholarship Symposium

Aquaporins are a family of small integral membrane proteins that transport water across cell membranes in response to osmotic gradients. They facilitate fluid secretion and absorption across epithelial surfaces in kidney tubules, exocrine glands, and gastrointestinal tract. Here, we describe a novel microfluidic method to evaluate and screen for aquaporin-based transmembrane permeability in mammalian cells. A microfluidic device was designed and fabricated for the encapsulation of single mammalian and yeast cells in micron-sized droplets. For this purpose, Chinese Hamster Ovarian (CHO) cells were used. CHO cells express AQP1 (aquaporin-1) homologous to human kidney aquaporins. The cells were cultivated and exposed ...


Aps March Meeting 2020: Undergraduate-Friendly Research In Soft Matter And Beyond, Vianney Gimenez-Pinto 2020 Lincoln University

Aps March Meeting 2020: Undergraduate-Friendly Research In Soft Matter And Beyond, Vianney Gimenez-Pinto

Title III Professional Development Reports

The in-person APS March Meeting 2020 taking place in Denver during March 02-06, 2020 was canceled in the last minute out of Covid-19 concerns for the well-being of the scientific community as well as the population of the city of Denver and the state of Colorado. Nevertheless, well-planned logistics by the physics community and the APS leadership, allowed attendants to share their findings, presenting their research works to their peers, and continuing the work towards the advancement of science. Given the historical and on-going under-representation of students of color in science and technology at all academic levels, there is a ...


Waiting-Time Paradox In 1922, Naoki Masuda, Takayuki Hiraoka 2020 University at Buffalo

Waiting-Time Paradox In 1922, Naoki Masuda, Takayuki Hiraoka

Northeast Journal of Complex Systems (NEJCS)

We present an English translation and discussion of an essay that a Japanese physicist, Torahiko Terada, wrote in 1922. In the essay, he described the waiting-time paradox, also called the bus paradox, which is a known mathematical phenomenon in queuing theory, stochastic processes, and modern temporal network analysis. He also observed and analyzed data on Tokyo City trams to verify the relevance of the waiting-time paradox to busy passengers in Tokyo at the time. This essay seems to be one of the earliest documentations of the waiting-time paradox in a sufficiently scientific manner.


Engineering Dopant Position In Structure-Controlled Ceo2-Zro2 Catalysts, Behnam Safavinia 2020 Louisiana State University

Engineering Dopant Position In Structure-Controlled Ceo2-Zro2 Catalysts, Behnam Safavinia

LSU Master's Theses

CeO2-ZrO2 (CZO) nanoparticles (NPs) have application in many catalytic reactions, such as methane reformation, due to their oxygen cycling ability. Ni doping has been shown to improve the catalytic activity and acts as an active site for the decomposition of methane. In this work, Ni:CZO NPs were synthesized via a two-step co-precipitation/molten salt synthesis to compare Ni distribution, oxygen vacancy concentration, and catalytic activity relative to a reference state-of-the-art catalyst. To better understand the effects of Ni position and dispersion, and oxygen vacancy formation in these materials, the Ni concentration, reaction time, and deposition methods ...


Non-Equilibrium Growth Of Metal Clusters On A Layered Material: Cu On Mos2, Dapeng Jing, Ann Lii-Rosales, King C. Lai, Qiang Li, Jaeyoun Kim, Michael C. Tringides, James W. Evans, Patricia A. Thiel 2020 Iowa State University and Ames Laboratory

Non-Equilibrium Growth Of Metal Clusters On A Layered Material: Cu On Mos2, Dapeng Jing, Ann Lii-Rosales, King C. Lai, Qiang Li, Jaeyoun Kim, Michael C. Tringides, James W. Evans, Patricia A. Thiel

Chemistry Publications

We use a variety of experimental techniques to characterize Cu clusters on bulk MoS2 formed via physical vapor deposition of Cu in ultrahigh vacuum, at temperatures ranging from 300 K to 900 K. We find that large facetted clusters grow at elevated temperatures, using high Cu exposures. The cluster size distribution is bimodal, and under some conditions, large clusters are surrounded by a denuded zone. We propose that defect-mediated nucleation, and coarsening during deposition, are both operative in this system. At 780 K, a surprising type of facetted cluster emerges, and at 900 K this type predominates: pyramidal clusters with ...


Chitosan-Adjuvanted Salmonella Subunit Nanoparticle Vaccine For Poultry Delivered Through Drinking Water And Feed, Sankar Renu, Yi Han, Santosh Dhakal, Yashavanth S. Lakshmanappa, Ninoshkaly Feliciano-Ruiz, Sujata Senapati, Balaji Narasimhan, Ramesh Selvaraj, Gourapura J. Renukaradhya 2020 Ohio Agricultural Research and Development Center and The Ohio State University

Chitosan-Adjuvanted Salmonella Subunit Nanoparticle Vaccine For Poultry Delivered Through Drinking Water And Feed, Sankar Renu, Yi Han, Santosh Dhakal, Yashavanth S. Lakshmanappa, Ninoshkaly Feliciano-Ruiz, Sujata Senapati, Balaji Narasimhan, Ramesh Selvaraj, Gourapura J. Renukaradhya

Chemical and Biological Engineering Publications

Poor induction of mucosal immunity in the intestines by current Salmonella vaccines is a challenge to the poultry industry. We prepared and tested an oral deliverable Salmonella subunit vaccine containing immunogenic outer membrane proteins (OMPs) and flagellin (F) protein loaded and F-protein surface coated chitosan nanoparticles (CS NPs) (OMPs-F-CS NPs). The OMPs-F-CS NPs had mean particle size distribution of 514 nm, high positive charge and spherical in shape. In vitro and in vivo studies revealed the F-protein surface coated CS NPs were specifically targeted to chicken immune cells. The OMPs-F-CS NPs treatment of chicken immune cells upregulated TLRs, and Th1 ...


Ternary Polar Intermetallics Within The Pt/Sn/R Systems (R = La− Sm): Stannides Or Platinides?, Melissa L. Rhodehouse, Volodymyr Smetana, Chris Celania, Anja-Verena Mudring, Gerd H. Meyer 2020 Iowa State University and Ames Laboratory

Ternary Polar Intermetallics Within The Pt/Sn/R Systems (R = La− Sm): Stannides Or Platinides?, Melissa L. Rhodehouse, Volodymyr Smetana, Chris Celania, Anja-Verena Mudring, Gerd H. Meyer

Ames Laboratory Accepted Manuscripts

Starting generally with a 4:6:3 molar ratio of Pt, Sn, and R (where R = La–Sm), with or without the application of a NaCl flux, seven ternary compounds were obtained as single crystals. The platinides Pt4Sn6R3 (R = La–Nd) crystallize with the Pt4Ge6Pr3 type of structure (oP52, Pnma, a = 27.6–27.8 Å, b = 4.59–4.64 Å, c = 9.33–9.40 Å). With R = Pr, Pt4Sn6Pr3–x (oP52, Pnma, a = 7.2863(3) Å, b = 4.4909(2) Å, c = 35.114(1) Å) is also obtained, which might be considered a ...


Tympanal Asymmetry In A Parasitoid Fly: Small Asymmetries Produce Big Gains, Max Mikel-Stites, Anne E. Staples 2020 Virginia Polytechnic Institute and State University

Tympanal Asymmetry In A Parasitoid Fly: Small Asymmetries Produce Big Gains, Max Mikel-Stites, Anne E. Staples

Biology and Medicine Through Mathematics Conference

No abstract provided.


Development And Application Of Elliptic Blending Lag K-Omega Sst Standard And Wall-Distance-Free Turbulence Model, Wenjie Shang 2020 Washington University in St. Louis

Development And Application Of Elliptic Blending Lag K-Omega Sst Standard And Wall-Distance-Free Turbulence Model, Wenjie Shang

Engineering and Applied Science Theses & Dissertations

In recent decades, Computational Fluid Dynamics (CFD) has become the most widely used technology to understand the fundamental complex fluid dynamics of turbulent flows as well as for modeling of turbulent flows in industrial applications. In industrial applications, the widely used methodology is to solve Reynolds-Average Navier-Stokes Equations (RANS) equations in conjunction with a turbulence model since it strikes a balance between accuracy and computational cost compared to other high fidelity approaches namely the Large Eddy Simulation (LES) and Direct Numerical Simulation (DNS), There are a large number of turbulence models proposed in past five decades, majority of them are ...


Numerical Investigation Of Wind Turbine Airfoils Under Clean And Dusty Air Conditions, SIYUAN CHEN 2020 Washington University in St. Louis

Numerical Investigation Of Wind Turbine Airfoils Under Clean And Dusty Air Conditions, Siyuan Chen

Engineering and Applied Science Theses & Dissertations

The focus of research in this thesis is on numerical simulation of airflow around wind turbine airfoils (S809, S814 and S1210) under both clean and dusty air conditions by using Computational Fluid Dynamics (CFD). The physical geometries of the airfoils and the meshing processes are completed in the ANSYS Mesh package ICEM. The simulations and post-processing are done by ANSYS FLUENT. For cases of clean air condition, Spalart–Allmaras (SA), realizable k-ε and Wray-Agarwal (WA) turbulence models are employed in the calculations. The results are compared with the experimental data for validation. For dusty air condition, simulation of the two-phase ...


Cfd Evaluation Of Blood Flow In An Improved Blalock-Taussig Shunt Using Patient Specific Geometries, Zhenghao Lin 2020 Washington University in St. Louis

Cfd Evaluation Of Blood Flow In An Improved Blalock-Taussig Shunt Using Patient Specific Geometries, Zhenghao Lin

Engineering and Applied Science Theses & Dissertations

Blalock-Taussig (BT) Shunt is a palliative surgical procedure used during a Norwood surgery on a newborn baby suffering from cyanotic heart defects. The BT Shunt can increase blood flow in patients’ pulmonary artery which can ease the “Blue Baby Syndrome.” Currently used BT Shunts do not produce a balanced flow distribution to the pulmonary arteries (PAs) which can cause high wall shear stress (WSS) and blood flow separation resulting in blood clots. A modified BT Shunt was designed to partially solve this problem. In our previous work [1], the modified BT Shunt was shown by numerical simulations to have the ...


The Impact Of A Smartlab Implementation On Rural Schools In North Dakota, Tonya M. Greywind 2020 Minnesota State University Moorhead

The Impact Of A Smartlab Implementation On Rural Schools In North Dakota, Tonya M. Greywind

Dissertations, Theses, and Projects

This mixed methods quasi-experimental phenomenological study investigated the impact that a SmartLab® implementation had on four rural schools in the state of North Dakota. This study featured semi structured interview questions for facilitators, semi-structured focus group questions for students, and a digital literacy pre and post assessment (DLA) that was administered to students. This study looked at student learning in terms of twenty-first century skills, teacher and student perspectives in terms of student learning as well as teacher perspectives on the impact of the SmartLab® on their own teaching methods.

Two facilitators from two of the four schools were interviewed ...


Prada: Portable Reusable Accurate Diagnostics With Nanostar Antennas For Multiplexed Biomarker Screening, Xiaona Wen, Yu-Chuan Ou, Holly F. Zarick, Xin Zhang, Anthony B. Hmelo, Quinton J. Victor, Eden P. Paul, Joseph M. Slocik, Rajesh R. Naik, Leon M. Bellan, Eugene C. Lin, Rizia Bardhan 2020 Vanderbilt University

Prada: Portable Reusable Accurate Diagnostics With Nanostar Antennas For Multiplexed Biomarker Screening, Xiaona Wen, Yu-Chuan Ou, Holly F. Zarick, Xin Zhang, Anthony B. Hmelo, Quinton J. Victor, Eden P. Paul, Joseph M. Slocik, Rajesh R. Naik, Leon M. Bellan, Eugene C. Lin, Rizia Bardhan

Chemical and Biological Engineering Publications

Precise monitoring of specific biomarkers in biological fluids with accurate biodiagnostic sensors is critical for early diagnosis of diseases and subsequent treatment planning. In this work, we demonstrated an innovative biodiagnostic sensor, portable reusable accurate diagnostics with nanostar antennas (PRADA), for multiplexed biomarker detection in small volumes (~50 μl) enabled in a microfluidic platform. Here, PRADA simultaneously detected two biomarkers of myocardial infarction, cardiac troponin I (cTnI), which is well accepted for cardiac disorders, and neuropeptide Y (NPY), which controls cardiac sympathetic drive. In PRADA immunoassay, magnetic beads captured the biomarkers in human serum samples, and gold nanostars (GNSs) “antennas ...


Polystyrene-Block-Polydimethylsiloxane As A Potential Silica Substitute For Polysiloxane Reinforcement, Liyang Shen, Tung-Ping Wang, Fang-Yi Lin, Sabrina Torres, Thomas Robison, Sri Harsha Kalluru, Nacú B. Hernández, Eric W. Cochran 2020 Iowa State University

Polystyrene-Block-Polydimethylsiloxane As A Potential Silica Substitute For Polysiloxane Reinforcement, Liyang Shen, Tung-Ping Wang, Fang-Yi Lin, Sabrina Torres, Thomas Robison, Sri Harsha Kalluru, Nacú B. Hernández, Eric W. Cochran

Chemical and Biological Engineering Publications

Here we report microphase-separated poly(styrene-block-dimethylsiloxane) (PS-b-PDMS) as a reinforcing filler in PDMS thermosets that overcomes the long-standing problem of aging in the processing of silica-reinforced silicone. Surprisingly, PS-b-PDMS reinforced composites display comparable mechanical performance to silica-modified analogs, even though the modulus of PS is much smaller than that of silica and there is no evidence of percolation with respect to the rigid PS domains. We have found that a few unique characteristics contribute to the reinforcing performance of PS-b-PDMS. The strong self-assembly behavior promotes batch-to-batch repeatability by having well-dispersed fillers. The ...


Exploring Attacks And Defenses In Additive Manufacturing Processes: Implications In Cyber-Physical Security, Nicholas Deily 2020 Washington University in St. Louis

Exploring Attacks And Defenses In Additive Manufacturing Processes: Implications In Cyber-Physical Security, Nicholas Deily

Engineering and Applied Science Theses & Dissertations

Many industries are rapidly adopting additive manufacturing (AM) because of the added versatility this technology offers over traditional manufacturing techniques. But with AM, there comes a unique set of security challenges that must be addressed. In particular, the issue of part verification is critically important given the growing reliance of safety-critical systems on 3D printed parts.

In this thesis, the current state of part verification technologies will be examined in the con- text of AM-specific geometric-modification attacks, and an automated tool for 3D printed part verification will be presented. This work will cover: 1) the impacts of malicious attacks on ...


Predicate Informed Syntax-Guidance For Semantic Role Labeling, Sijia Wang 2020 Washington University in St. Louis

Predicate Informed Syntax-Guidance For Semantic Role Labeling, Sijia Wang

Engineering and Applied Science Theses & Dissertations

In this thesis, we consider neural network approaches to the semantic role labeling task in seman-tic parsing. Recent state-of-the-art results for semantic role labeling are achieved by combiningLSTM neural networks and pre-trained features. This work offers a simple BERT-based modelwhich shows that, contrary to the popular belief that more complexity means better performance,removing LSTM improves the state of the art for span-based semantic role labeling. This modelhas improved F1 scores on both the test set of CoNLL-2012, and the Brown test set of CoNLL-2005 by at least 3 percentage points.In addition to this refinement of existing architectures, we ...


Digital Commons powered by bepress