Engineering Commons^™

Automatically Inferring Image Bases Of Arm32 Binaries, Daniel T. Chong

Browse all Theses and Dissertations

Reverse engineering tools rely on the critical image base value for tasks such as correctly mapping code into virtual memory for an emulator or accurately determining branch destinations for a disassembler. However, binaries are often stripped and therefore, do not explicitly state this value. Currently available solutions for calculating this essential value generally require user input in the form of parameter configurations or manual binary analysis, thus these methods are limited by the experience and knowledge of the user. In this thesis, we propose a user-independent solution for determining the image base of ARM32 binaries and describe our implementation. Our …

Graduate School Academic Catalog 2022-2023, Graduate School Of Engineering And Management, Air Force Institute Of Technology

AFIT Documents

The Graduate Catalog represents the offerings, programs, and requirements in effect at the time of publication.

Nanomechanical Resonators: Toward Atomic Scale, Bo Xu, Pengcheng Zhang, Jiankai Zhu, Zuheng Liu, Alexander Eichler, Xu-Qian Zheng, Jaesung Lee, Aneesh Dash, Swapnil More, Song Wu, Yanan Yanan, Hao Jia, Akshay Naik, Adrian Bachtold, Rui Yang, Philip X.-L. Feng, Zenghui Wang

Department of Electrical and Computer Engineering: Faculty Publications

The quest for realizing and manipulating ever smaller man-made movable structures and dynamical machines has spurred tremendous endeavors, led to important discoveries, and inspired researchers to venture to new grounds. Scientific feats and technological milestones of miniaturization of mechanical structures have been widely accomplished by advances in machining and sculpturing ever shrinking features out of bulk materials such as silicon. With the flourishing multidisciplinary field of low-dimensional nanomaterials, including one-dimensional (1D) nanowires/nanotubes, and two-dimensional (2D) atomic layers such as graphene/phosphorene, growing interests and sustained efforts have been devoted to creating mechanical devices toward the ultimate limit of miniaturization— genuinely down …

Tunable Blood Shunt For Neonates With Complex Congenital Heart Defects, Ellen Garver, Christopher B. Rodell, Kristen Shema, Krianthan Govender, Samantha E. Cassel, Bryan Ferrick, Gabriella Kupsho, Ethan Kung, Kara L. Spiller, Randy Stevens, Amy L. Throckmorton

Publications

Despite advancements in procedures and patient care, mortality rates for neonatal recipients of the Norwood procedure, a palliation for single ventricle congenital malformations, remain high due to the use of a fixed-diameter blood shunt. In this study, a new geometrically tunable blood shunt was investigated to address limitations of the current treatment paradigm (e.g., Modified Blalock-Taussig Shunt) by allowing for controlled modulation of blood flow through the shunt to accommodate physiological changes due to the patient’s growth. First, mathematical and computational cardiovascular models were established to investigate the hemodynamic requirements of growing neonatal patients with shunts and to inform design …

The Extended Effect Of Top-Dressed Recovered Struvite Fertiliser On Residual Irish Grassland Soil Phosphorus Levels Compared To Commercial Phosphorus Fertiliser, Ciarán O’Donnell, Denise Barnett, Joe Harrington, Niamh Power

Publications

Phosphorus (P) is an essential growth-limiting nutrient that cannot be synthetically produced. Mineral P fertilisers are typically applied to crops to sustain modern farming practice and food production. These fertilisers are generally derived from finite phosphate ore, for which there is much concern over long-term sustainability. To address these concerns, various technologies have been developed to recover P from municipal wastewater treatment plants. One product recovered from these processes is struvite, which is a precipitate formed of magnesium, ammonium, and phosphate. To analyse the fertilisation value of the recovered struvite, field trials were conducted on perennial ryegrass (Lolium perenne) over …

Investigating The Performance Of Green Roof For Effective Runoff Reduction Corresponding To Different Weather Patterns: A Case Study In Dublin, Ireland, Arunima Sarkar Basu, Bidroha Basu, Francesco Pilla, Srikanta Sannigrahi

Publications

This article aims to analyse the performance of green roof in runoff reduction. A case study has been conducted through a deployed green roof at the custom house quay building in Dublin, Ireland. Modular green roofs have been deployed which have IoT scales associated to it for measuring the effective reduction in runoff. Hydro-meteorological variables such as rainfall, temperature, relative humidity and wind speed values were corresponded to the amount of runoff reduction by means of a regression-based relationship. Comparison of the observed runoff reduction from a modular green roof and that estimated based on the developed regression relationship yielded …

Optimization-Based Uav Fleet Routing And Safety Assurance – Models, Algorithms, And Prototyping, Zhenyu Zhou

Wayne State University Dissertations

Unmanned aerial vehicles (UAVs), especially multi-rotor drones, have been increasingly used in various scenarios in the last decade. With the reduced hardware costs, improved battery life, and enhanced processor performance, we can eventually allow all kinds of drones to automatically travel through the low-altitude airspace. The large-scale application of drones will extend the basic transportation facilities from the ground to the air and form 3D transportation networks for the future. Compared to current ground-vehicle and aircraft traffic systems, multi-UAV systems are far from well-developed. Most current multi-UAV systems are human-operated or pre-programmed to perform specific tasks. The current application of …

Automotive Product Assortment Planning With Consideration Of Distribution Channel Dynamics, Madagedara Maduka Rushanjalee Balasooriya

Wayne State University Dissertations

Automotive original equipment manufacturers (OEMs) are putting a lot of effort into maintaining an efficient order catalog to offer better products to their customers in maketo-stock (MTS) markets. While product “assortment planning" research grows to more effectively identify the best assortments for OEMs, the existing configurable assortment planning literature ignores a significant dimension: the impact of distribution channels, especially dealer franchise networks. Dealers face unique challenges in trying to best satisfy the choice preferences of their local consumers by balancing their limited product configuration inventory with profitability. In many predominantly MTS automotive markets such as the U.S., the reality is …

Assessment Of Variations In Runoff Due To Landcover Changes Using The Swat Model In An Urban River In Dublin, Ireland, Arunima Sarkar Basu, Laurence William Gill, Francesco Pilla, Bidroha Basu

Publications

Investigating the impact of land cover change in hydrological modelling is essential for water resources management. This paper investigates the importance of landcover change in the development of a physically-based hydrological model called SWAT. The study area considered is the Dodder River basin located in southern Dublin, Ireland. Runoff at the basin outlet was simulated using SWAT for 1993–2019 using five landcover maps obtained for 1990, 2000, 2006, 2012 and 2018. Results indicate that, in general, the SWAT model-simulated runoff for a chosen time-period are closer to the real-world observations when the landcover data used for simulation was collated as …

On-Site Analyses As A Decision Support Tool For Dredging And Sustainable Sediment Management, Bruno Lemière, Valérie Laperche, Arjan Wijdeveld, Marco Wensveen, Richard Lord, Alasdair Hamilton, Laurence Haouche, Mathieu Henry, Joe Harrington, Branislav Batel, Pascal Lehette

Publications

Beneficial use of dredged sediments, either in harbours or waterways, is based on their potential as alternative resources. Such sediments can be considered as bulk materials for industrial needs, which is predicated on their current waste status or meeting end-of-waste constraints. They also can be an integral part of beneficial use projects using sediments as a bulk component, including civil engineering and landscaping. This is particularly important for beneficial use projects focusing on climate change effects mitigation, such as flood protection works, coastline defence or littoral urban areas redevelopment. When dredged sediment is used as a bulk material, its acceptability …

The Role Of Ball Backspin Alignment And Variability In Basketball Shooting Accuracy, Nathan Slegers, Dave Love

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Interaction between the shooting hand and ball at the moment a basketball is released generates a three dimensional backspin of the ball. This study is the first to investigate how characteristics of the backspin alignment and variability contribute to lateral shooting accuracy. Spin axis (SA) direction and backspin magnitude were measured on 25 shot attempts for 26 collegiate basketball players (male: n = 16, female: n = 10). The mean SA alignment, as viewed from the shooting hand side, was found to be tipped down and towards the target (p < 0.001). Standard deviations (SD) in the SA alignment were strong predictors of lateral accuracy (vertical SD: r = 0.80, p < 0.001, forward-backward SD: r = 0.51, p = 0.01), with variation in the vertical alignment being the best predictor. No significant correlation between mean SA misalignment and lateral accuracy was observed. However, intra-individual relationships between SA misalignment and lateral error revealed that individuals tended to have 0.17 degrees more misalignment for each cm of lateral error (p < 0.001, 95% CI: 0.24–0.09). These indicate that while an individual’s mean alignment may not predict lateral accuracy, improving one’s SA alignment and reducing alignment variability may increase lateral accuracy.

Multiscale Simulation And Machine Learning-Assisted Performance Prediction For Cementitious Composites, Gideon A. Lyngdoh

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Concrete is the most widely used construction material in the world for building infrastructures, bridges, and tunnels. However, cement production contributes to 5-7% of the global CO2 emissions, and thus, there is a significant need for innovative sustainable alternatives without compromising on the mechanical properties. Most of the approaches to address these concerns so far rely on the trial and error-based experimental response. Hence, robust multiscale simulation-based design approaches are needed to be developed for fundamental understanding as well as the comprehensive design of these new sustainable innovative materials. However, performing the simulations with millions of degrees of freedom could …

What Are The Desired Properties Of Recycling-Derived Fertilisers From An End-User Perspective?, Aoife Egan, Amrita Saju, Ivona Sigurnjak, Erik Meers, Niamh Power

Publications

The circular economy aims to promote the use of recycled products and to close the nutrient cycle loop by avoiding nutrient leakage and detrimental environmental effects, while also reducing the dependency on fossil fuels. The production of nitrogen is energy-intensive, requiring natural gas, whereas, finite resources like phosphorus and potassium are mined. Recent developments in nutrient recovery technologies have resulted in different types of recycling-derived fertilisers (RDFs) with the potential to substitute commonly used synthetic mineral fertilisers. This study aims to understand perceptions and preferences regarding the properties and parameters that end-users find important in RDFs. A better understanding of …

A Downscaled Economic Model Validated And Applied To Sediment Management Projects In Ireland And Scotland, Joe Harrington, R O'Sullivan, A Hamilton, Requested Lord, K Torrance, A Wijdeveld, T Debuigne, E Masson, B Batel

Publications

Purpose

This paper presents a regionally downscaled economic model developed to assess the impacts of the management of dredged sediments on Gross Domestic Product (GDP) and jobs created; the model is validated and applied using real project data from sediment management projects in Ireland and Scotland. The model provides significant insight into and allows impact analysis for the economic aspect of sediment management projects with the potential to facilitate and inform stakeholders across the sediment management sector.

Methods

The economic model facilitates regional analysis of the impacts of sediment management projects on GDP and job creation for direct, indirect and …

Assessment Of Climate Change Impact On The Annual Maximum Flood In An Urban River In Dublin, Ireland, Arunima Sarkar Basu, Laurence William Gill, Francesco Pilla, Bidroha Basu

Publications

Hydrological modelling to address the problem of flood risk corresponding to climate change can play an important role in water resources management. This paper describes the potential impact of climate change on an urban river catchment using a physically based hydrological model called Soil Water Assessment Tool (SWAT). The study area considered is the Dodder River basin located in the southern part of Dublin, the capital city of Ireland. Climate projections from three regional climate models and two representative concentration pathways (RPC 4.5 and RCP 8.5) were used to evaluate the impact of flooding corresponding to different climate change scenarios. …

Dielectrophoretic Trapping Of Carbon Nanotubes For Temperature Sensing, Kaylee Burdette

Theses, Dissertations and Capstones

Conventional sensors are rapidly approaching efficiency limitations at their current size. In designing more efficient sensors, low dimensional materials such as carbon nanotubes (CNTs), quantum dots, and DNA origami can be used to enable higher degrees of sensitivity. Because of the high atomic surface to core ratio, these materials can be used to detect slight changes in chemical composition, strain, and temperature. CNTs offer unique advantages in different types of sensors due to their electromechanical properties. In temperature sensing, the high responsiveness to temperature and durability can be used to produce an accurate, reliable sensor in even extreme temperatures. This …

Some Insights On Flow Over Sharp-Crested Weirs Using Computational Fluid Dynamics: Implications For Enhanced Flow Measurement, Joseph M. Sinclair, S. Karan Venayagamoorthy, Timothy K. Gates

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study reexamines flow over a sharp-crested weir using computational fluid dynamics (CFD) to identify the optimal operating range under which the weir functions with accuracy as a free-flowing measurement device. A numerical parametric study was conducted for two separate channel and weir geometries under a range of flow rates resulting in different h/P values, where h is the elevation head over the weir crest, and P is the weir height. Analysis of velocity and pressure profiles over the weir revealed three distinct flow regimes: a high acceleration regime, an ideal operating regime, and a weir-inundated regime that may lead …

Stretchable Sensor Comprising Perovskite And Mechanoluminescence Materials For Structural Health Monitoring, Md Abu Sayeed Shohag

Engineering and Technology

No abstract provided.

Improving Or Operations Using Machine Learning Techniques, Tannaz Khaleghi

Wayne State University Dissertations

Recently, health care related studies are being widely conducted by researchers using unique and efficient techniques to increase system profitability, quality of care, and patient satisfaction. Surgery department is considered as the hospital's engine, and cost of surgical services has a huge impact on the overall profitability of the hospital. This thesis proposes novel approaches to improve the efficiency of surgical services by using machine learning concepts.

In the first part, this research investigates the prediction of the surgery durations and Current Procedural Terminology (CPT) Codes. Accurate prediction of the surgery duration will improve the utilization of indispensable surgical resources …

There From The Beginning: The Women Of Los Alamos National Laboratory Supporting National And International Nuclear Security, Olga Martin, Laura Mcclellan, Octavio Ramos, Heather Quinn

International Journal of Nuclear Security

From the beginning of the Manhattan Project in the early 1940s, the women of what would become Los Alamos National Laboratory (LANL) worked in technical positions alongside their male counterparts, played a key role as computers, and worked in administrative jobs as secretaries, phone operators, bookkeepers, and on behalf of the U.S. Army in the Women’s Army Corps.

Throughout the history of the Laboratory, women experts at LANL helped establish and lead important national and international security programs, with careers in science, technology, engineering, and mathematics. Over time, the women of Los Alamos have come together under various Employee Resource …

Rc Baja Drivetrain And Steering, Jacob Swift

All Undergraduate Projects

The goal of this project is to construct a small remote-control vehicle that is capable of fluid, controlled and precise movement. In order to allow the smooth movement of an RC Car through an obstacle course, the back wheels of the car must be able to receive power and the front wheels must be able to turn. This chassis and suspension that supported these assemblies was designed by project partner Sean Gordon. Design requirements were as follows:

• Drivetrain and Steering systems must weigh a combined

• Drivetrain must produce a maximum output speed >=20mph

• Turning angle of no less than 45 …

Rc Baja: Drivetrain And Steering, Mathew Morgan

All Undergraduate Projects

The RC Baja competition is a contest where undergraduate mechanical engineering students design, build, and compete against one another. The objective of this competition is to create the most efficient RC car possible. A gear train analysis was done and showed an 8:1 gear ratio would be the most efficient ratio due to the chosen motor having a higher torque output. Also, a stress analysis was done and showed that 2011 T3 aluminum passed the stress and weight criteria. These analyses ensured the RC Baja car was efficient. Most of the parts for the drivetrain and steering subassemblies were machined …

Jcati Crusher Drive Train, Matthew Denchel

All Undergraduate Projects

This project is sponsored by JCATI (Joint Center for Aerospace Technology Innovation) to research and manufacture a machine to recycle strips of carbon fiber from retired aircraft wings. The drive train powering the crushing wheels was not delivering enough power into the crushing wheels to completely delaminate the strips of carbon fiber. Another issue experienced was the spur gears transferring power between crushing shafts failed.

This issue was first approached by analyzing the gear reduction ratio powering the crushing wheels. Then the next analysis was performed to find the amount of torque required to delaminate the carbon fiber. The minimum …

Jcati Carbon Fiber Recycler: Oven Enclosure, Margarita Romero

All Undergraduate Projects

Central Washington University partners with Boeing and is funded by the Joint Center of Aerospace Technology Innovation (JCATI) to develop a mechanism that takes carbon fiber wing trimmings from Boeing that are resin coated and recycles carbon fiber. This is done by crushing the wing trimmings and then putting it into a 500°C oven to melt off the resin. This project focuses on the enclosure for the oven and making sure precautions are met such as having the outside surface be less than 45c through heat transfer analysis, argon fills enclosure in 13 minutes through fluid dynamics analysis, and 99% …

R/C Baja Truck Suspension, Chassis And Steering, Ryan Lafrombois

All Undergraduate Projects

The ASME RC Baja Challenge is an annual competition that the Central Washington University Mechanical Engineering and Technology (MET) department takes part in. Senior level engineers divided the work between the drivetrain and the chassis/suspension while designing and manufacturing to meet a set of requirements. Next, a device was to be developed to be able to withstand the extreme forces to be successful in the competition at the end of the year. The process would require that the students use their acquired knowledge and skills to design, manufacture, and analyze a capable device. Designing involved the completion of 12 analyses …

Jcati Carbon Fiber Recycler: Oven Heating System, Sean Tomkins

All Undergraduate Projects

What happens to carbon fiber from airline wing tips when their service life ends, and they get replaced? Throwing them away would be wasteful, the Joint Center for Aerospace Technology Innovation (JCATI) project can extract the carbon fiber from airline wing tips to be recycled. The JCATI project is a continuation from the work done by previous senior class engineering students and has a new set of issues to be addressed each year. This year there was a need for a new oven system for the JCATI carbon fiber recycler with this project’s focus being on designing the oven’s heating …

Rc Baja Engineering Report, Matthew Hart

All Undergraduate Projects

The ASME RC Baja is a competition that tests engineering students’ ability design, build, and test an RC car. The vehicle then competes against other engineering student’s RC cars. The objective is to manufacture the most efficient and cost-effective RC Baja car.

During the first quarter of senior project, the student’ engineering skill was applied to designing an RC car that will be able to compete in a competition at the end of spring quarter. The student was tasked with using all the information from the classes the student had taken previously at Central Washington University and design and build …

New Trail Crossing At Mink Brook Nature Preserve, Dylan Chan, Glendora Murphy, Madison Cook, Michelle Wang, Sacha Pritzker, Abigail Wilson

ENGS 89/90 Reports

The trail crossing connecting the two sides of Mink Brook Nature Preserve in Hanover, NH has reached the end of its useful life and must be replaced. The crossing is located on land subject to strict conservation requirements and is sacred to the local Abenaki Tribe. Therefore, the replacement structure must have limited use of metal and nonnative materials, be removable if necessary, and have minimal environmental impact in order to be respectful of the significance and history of the site. The process of designing the new crossing focused on incorporating Abenaki and Hanover community member values, such as maintaining …

Design And Integration Of Smart Surgical Drill For Use In Novel Spine Surgery, Abigail Brazil, Lucas Anderson, Michael Cullen, Mikaela O'Brien, Sajani Sivakumar, Sherrina Hwang

ENGS 89/90 Reports

Spinal fusion surgeries require substantial resources, result in long recovery times, and can cause unintended damage to the patient. PEER Technologies is working to revolutionize the spinal fusion space with the development of a new procedure, termed C-LIF. PEER’s C-LIF procedure is minimally invasive, minimizing patient tissue damage and decreasing recovery time, but lacks the sensory information present in open surgery. Our team investigated how different sensing modalities could be used to account for this lost information. We began by identifying relevant sensing modalities, interviewing spinal surgeons, and performing ex-vivo testing in excised pig spines. We then developed a benchtop …

Developing A Standardized Approach To Improve Solar Hybrid Minigrids In Nigeria, Ethan Adner, Warren Coleman, Daniel Gyampo, Ashaunte Hill

ENGS 89/90 Reports

A large number of communities in rural areas without access to electricity from the grid rely on inefficient sources of power such as diesel generators, which present setbacks attributed to high pollution and have a high levelized cost of energy (LCOE) currently between US$ 0.35–0.70/kWh. Solar hybrid minigrids present a possible solution to this energy problem, however most current iterations fail to compete with diesel in terms of the LCOE, due to the actual grid operation not matching the theorized grid operation, mainly because of oversizing and improper dispatch of the system. We tackle this problem by presenting a report …