Engineering Commons^™

Cache-Enabled In Cooperative Cognitive Radio Networks For Transmission Performance, Jiachen Yang, Houbing Song, Chaofan Ma, Jiabao Man, Huifang Xu, Gan Zheng

Publications

The proliferation of mobile devices that support the acceleration of data services (especially smartphones) has resulted in a dramatic increase in mobile traffic. Mobile data also increased exponentially, already exceeding the throughput of the backhaul. To improve spectrum utilization and increase mobile network traffic, in combination with content caching, we study the cooperation between primary and secondary networks via content caching. We consider that the secondary base station assists the primary user by pre-caching some popular primary contents. Thus, the secondary base station can obtain more licensed bandwidth to serve its own user. We mainly focus on the time delay …

Predicting Pilot Misperception Of Runway Excursion Risk Through Machine Learning Algorithms Of Recorded Flight Data, Edwin Vincent Odisho Ii

Doctoral Dissertations and Master's Theses

The research used predictive models to determine pilot misperception of runway excursion risk associated with unstable approaches. The Federal Aviation Administration defined runway excursion as a veer-off or overrun of the runway surface. The Federal Aviation Administration also defined a stable approach as an aircraft meeting the following criteria: (a) on target approach airspeed, (b) correct attitude, (c) landing configuration, (d) nominal descent angle/rate, and (e) on a straight flight path to the runway touchdown zone. Continuing an unstable approach to landing was defined as Unstable Approach Risk Misperception in this research. A review of the literature revealed that an …

Reverse Osmosis; Addressing Freshwater Shortage With Sustainable Desalination, Jessica Savage

Sustainability Conference

Water security is an imperative part of high-functioning societies. Currently, large populations of the globe live in water-impoverished or water-stressed areas. With climate change and growing global populations, projections show more people being impacted by issues of water shortage.

One solution to water security is the implementation of desalination, specifically with reverse osmosis systems. This presentation walks through the history, capabilities, future work, and explanations on how reverse osmosis systems work. With continued research on improving desalination, communities in both developed and developing nations around the world can work towards total water security.

Recovering From Industrial Overshoot: Thermal Removal Of Atmospheric Co2, Ted Von Hippel, Sandra Boetcher, Matthew Traum, Farshid Azadian Ph.D., William Mackunis

Sustainability Conference

Humanity will soon overshoot a safe level of atmospheric CO2, if it hasn't done so already. Countries, industries, and the global economy need to dramatically and quickly alter their behavior and technology to avoid this dangerous overshoot, yet this appears unlikely. Direct Air Capture of CO2 represents an insurance policy for society - a way of removing excess atmospheric CO2. I will present an approach to this problem based on thermal physics that cools cubic kilometers of air to extract CO2 as it sublimates. I propose a combination of an efficient heat exchanger, radiative cooling, and refrigeration, all at industrial …

Adaptable Clean Energy Laboratory, Joao Marcelo Rocha Belmonte, Marc D. Compere

Sustainability Conference

The Adaptable Clean Energy (ACE) Lab is a real-world, long term, test platform that will guide the courses of the Energy Systems track. The lab will provide realistic electrical and HVAC loads that mimic a solar powered office. The lab is a 20’ high cube shipping container modified with a door, windows, lights computers, air conditioner and appliances. The lab is Net-Zero and powered entirely from the sun. Two insulation test sections expose the exterior walls for research access to real external heat loads in a real building

Residential Thermal Storage And Cooling, Joao Marcelo Rocha Belmonte, Jacob Anderson, Andrew Clarke, Daphne Forester, Bianca Hardtke, Josh Hartman, Marc D. Compere

Sustainability Conference

No abstract provided.

Solar Powered Parking Lot Lights, Jordyn Taylor

Sustainability Conference

Solar energy is a renewable resource growing exponentially around the country over the past few decades. Solar energy works through the use of photo-voltaic cells, which work to convert energy from sunlight into electricity. This is done within solar panels, which are then connected to batteries for energy storage to use as needed. As production has increased over past decades, the cost for solar panel hardware and installment has thus fallen to meet consumer need. While most common implementations include solar panels attached to one’s home or solar panel ‘fields’ for charging entire towns, there has been a steady rise …

Solar District Cup Competition, Qi Jiang, Kristen A. Holman, Benjamin F. Aulenbab, Adi Alharbi, Chenge Liu

Sustainability Conference

The Solar District Cup is a two-semester design competition sponsored by the U.S. Dept. of Energy in which teams from across the nation compete to design the most efficient and cost effective solar plus storage system for a unique district case. The Embry Riddle team was tasked with designing such a system for New Mexico State University in Las Cruses, NM.

Developing A Taxonomy For Success In Commercial Pilot Behaviors, Kristine Kiernan, David S. Cross, Mark Scharf Ph.D.

Publications

Human error has been well studied in aviation. However, less is known about the ways in which human performance maintains and contributes to aviation safety. The lack of data on positive human performance prevents consideration of the full range of human behaviors when making safety and risk management decisions. The concept of resilient performance provides a framework to understand and classify positive human behaviors. Through interviews with commercial airline pilots, this study examined routine airline operations to evaluate the concept of resilient performance and to develop a taxonomy for success. The four enablers of resilient performance, anticipation, learning, responding, and …

Close Formation Flight Missions Using Vision-Based Position Detection System, Ashok Sarath Chandra Reddy Irigireddy

Doctoral Dissertations and Master's Theses

In this thesis, a formation flight architecture is described along with the implementation and evaluation of a state-of-the-art vision-based algorithm for solving the problem of estimating and tracking a leader vehicle within a close-formation configuration. A vision-based algorithm that uses Darknet architecture and a formation flight control law to track and follow a leader with desired clearance in forward, lateral directions are developed and implemented. The architecture is run on a flight computer that handles the process in real-time while integrating navigation sensors and a stereo camera. Numerical simulations along with indoor and outdoor actual flight tests demonstrate the capabilities …

Public Acceptance Of Ai Technology In Self-Flying Aircraft, Sarah M. Talley

Journal of Aviation/Aerospace Education & Research

The research article includes a literature dissection on the topics of public acceptance of automated vehicles, including self-driving cars and unmanned aerial vehicles. Information reviewed will be applied to the potential future application of self-flying aircraft. The use of the Technology Acceptance Model is reviewed for application of public acceptance studies. Contributing factors commonly observed include perceived ease of use, perceived usefulness, perceived risk and environmental benefits. Additionally, trust in automated technology for decision-making is reviewed. Research is based on existing studies of public acceptance in similar technologies and is applied to the likely public acceptance of self-flying aircraft.

Active Fault-Tolerance Of The Unmanned Aerial Vehicle Automatic Control Systems, Vuong Anh Trung, Nguyen Van Thinh, Nguyen Duc Thanh, Nguyen Quang Vinh, Tran Thuan Hoang

International Journal of Aviation, Aeronautics, and Aerospace

This paper presents an introductory overview of principles of the three-layer hierarchy of active fault-tolerance, providing, determination of the fault type with as many details as enough to get recoverable fault reason and failure toleration by flexible redundancy using; the conception of active fault-tolerant control in abnormal modes is described. Developed models and methods of a systematic approach to fault tolerance in the direction of the effective use of the signal, parametric and structural redundancies and selection of parrying tools. Performed experimental researches of the unmanned aerial vehicle (UAV) automatic control systems (ACS).

Occupational Radiation Exposures In Aviation: Air Traffic Safety Systems Considerations, Adeyinka Olumuyiwa Osunwusi

International Journal of Aviation, Aeronautics, and Aerospace

Radiation from both natural and artificial sources is an inescapable and undeniable reality of human existence. Aside from exposure to radiation from a wide variety of natural sources including background ionizing radiation and electromagnetic fields from the earth, the increasing multiplicity of scientific and technological advancements and the growing complexities of the urbanization process are combining to elevate the susceptibility of mankind to non-ionizing radiation from electromagnetic fields. Debates regarding the health outcomes of occupational radiation exposures in aviation have been intense in recent times with a focus that appears predominantly riveted on in-flight radiation exposures. Whereas the vast majority …

Fatigue Identification And Management In Flight Training Among Collegiate Aviation Pilots, Flavio Mendonca Ph.D., Julius Keller Ph.D., Michael Robertson Ph.D., Matt Romero

Publications

Objective: The purpose of this study was fivefold: to investigate the symptoms that would prompt collegiate aviation pilots perceive they are fatigued; to investigate the time of the day they are most fatigued; to investigate their academic and personal schedules; to investigate the methods collegiate aviation pilots utilize to ensure they are fit to fly; and to investigate whether they have received any academic and/or flight fatigue identification and management training.

Background: Fatigue is a pervasive safety hazard in aviation affecting several aspects of flight crew members’ ability to perform their job. Fatigue in aviation and its consequences has been …

Standardization Roadmap For Unmanned Aircraft Systems, Version 2.0, Kristine Kiernan, Robert Joslin, John Robbins

Publications

This Standardization Roadmap for Unmanned Aircraft Systems, Version 2.0 (“roadmap”) is an update to version 1.0 of this document published in December 2018. It identifies existing standards and standards in development, assesses gaps, and makes recommendations for priority areas where there is a perceived need for additional standardization and/or pre-standardization R&D.

The roadmap has examined 78 issue areas, identified a total of 71 open gaps and corresponding recommendations across the topical areas of airworthiness; flight operations (both general concerns and application-specific ones including critical infrastructure inspections, commercial services, and public safety operations); and personnel training, qualifications, and certification. Of that …

Physiological Effects During Aerobatic Flights On Science Astronaut Candidates, Pedro Llanos, Diego M. Garcia

Publications

Spaceflight is considered the last frontier in terms of science, technology, and engineering. But it is also the next frontier in terms of human physiology and performance. After more than 200,000 years humans have evolved under earth’s gravity and atmospheric conditions, spaceflight poses environmental stresses for which human physiology is not adapted. Hypoxia, accelerations, and radiation are among such stressors, our research involves suborbital flights aiming to develop effective countermeasures in order to assure sustainable human space presence. The physiologic baseline of spaceflight participants is subject to great variability driven by age, gender, fitness, and metabolic reserve. The objective of …

Physiological Effects On Scientist Astronaut Candidates: Hypobaric Training Assessment, Pedro Llanos, Diego Garcia

Publications

This paper is addressed to expanding our understanding of the effects of hypoxia training on our bodies to better model its dynamics and leverage some of its implications and effects on human health. Hypoxia training is a recommended practice for military and civilian pilots that allow them to recognize their early hypoxia signs and symptoms, and Scientist Astronaut Candidates (SACs) who underwent hypobaric hypoxia (HH) exposure as part of a training activity for prospective suborbital flight applications. This observational-analytical study describes physiologic responses and symptoms experienced by a SAC group before, during and after HH exposure and proposes a model …

Language Education For Ab Initio Flight Training: A Plan Going Forward, Jennifer Roberts, Alan Orr

Publications

English language proficiency for the aviation industry is a critical issue given the industry’s growth in regions of the world where English is not a first or a national language. This chapter discusses language training for ab initio flight students who will comprise much of the next generation of aviation professionals (NGAP). It describes aviation English as a form of English for Specific Purposes (ESP), and the language skills required for flight school contexts where English is the Medium of Instruction (EMI). The chapter advocates for the assessment of incoming ab initio flight school students using a tool adapted from …

Coverage Guided Differential Adversarial Testing Of Deep Learning Systems, Jianmin Guo, Houbing Song, Yue Zhao, Yu Jiang

Publications

Deep learning is increasingly applied to safety-critical application domains such as autonomous cars and medical devices. It is of significant importance to ensure their reliability and robustness. In this paper, we propose DLFuzz, the coverage guided differential adversarial testing framework to guide deep learing systems exposing incorrect behaviors. DLFuzz keeps minutely mutating the input to maximize the neuron coverage and the prediction difference between the original input and the mutated input, without manual labeling effort or cross-referencing oracles from other systems with the same functionality. We also design multiple novel strategies for neuron selection to improve the neuron coverage. The …

Implementing The Repairer Human Factors Safety Reporting System Through Mrm (Mxhf) To Meet Sms Compliance In Aviation Maintenance, Mark D. Miller, Bettina Mrusek

Publications

Reiterating the importance of having a human factor related safety reporting system for aviation maintenance to reduce human error and utilizing it to gain SMS compliance, the REPAIRER method of identifying and reporting human factors hazards in aviation maintenance is reintroduced. How and why the REPAIRER method system is of such importance in the implementation of aviation maintenance safety programs can be linked to the success and evolution of maintenance resource management and human factors programs which have been effective in reducing human error in aviation maintenance. These programs are rooted in effective communication methods, as well as the identification …

Assessing Cognitive Processing And Human Factors Challenges In Nextgen Air Traffic Control Tower Team Operations, Mark D. Miller, Sam Holley, Bettina Mrusek, Linda Weiland

Publications

Previous research of Terminal Radar Control Facilities and Standard Terminal Automation Replacement Systems interactions by the authors examined how combined NextGen digitized technology affects air traffic controller functions. Applying their updated SHELL model, human factors implications on the Tower Team before and after implementing NextGen technology were examined, focusing on cognitive loading and automated functions affecting each team member. A survey examined where cognitive difficulties occur when controllers are responsible for multiple screen views, remote airfields or helipads, and digitized cameras and blind spots. Scanning challenges were identified where local traffic, ground operations, and data converge onto one screen, and …

Repairer Reporting System User Analysis For Sms Compliance In Aviation Maintenance, Mark D. Miller, Bettina Mrusek

Publications

To resolve the issue of human error in maintenance the REPAIRER reporting system is revisited as it has great potential by combining a human factors analysis with a risk management safety reporting mechanism. It is also timely as a human factors centered safety reporting method like the REPAIRER could now be feasibly implemented through the new mandatory FAA (Federal Aviation Administration) FAR 121 requirement to use SMS (Safety Management System) pillars and through the new FAA MxHF human factors training. With the current FAA support in place and the ever growing need to add human factors to combat human error …

Airport Operations Delays And Possible Mitigation Through Electric Taxi Systems: A Qualitative Case Study, David Cross, Kristine Kiernan, Mark Scharf Ph.D.

Publications

Airline daily departures, not including private aircraft, increased from 25,143 in 2000 to 36,722 in 2017. More passengers necessitate more aircraft and more flights. With more aircraft at terminals, ground delays, based on current airport design, will continue to increase. Systems that allow for reduced aircraft time on the ground will improve airline economics and airport operations, in addition, will reduce airline delays both for departure and arrival at the gate. The purpose of this qualitative research study was to explore the efficacy, from ramp controllers’ perspectives, of equipping airliners with an electric taxi system. Prototype electric taxi systems have …

Assessing If Motivation Impacts General Aviation Pilots’ Persistence In Varying Weather Conditions, Sabrina Woods

Doctoral Dissertations and Master's Theses

Continued flight under visual flight rules into instrument meteorological conditions is the predominant cause for fatal accidents by percentage, for general aviation aircraft operations. It is possible that a pilot’s motivation or reason for flying will override other safer, more logical courses of action when a hazard presents itself. The decision appears to stem from a willingness to persist in a course of action despite factors that indicate an alternate and safer course is warranted. This research addresses what is currently presumed about the decision to continue flying under visual flight rules into instrument conditions and marries those ideas with …

Methodology For Quantifying Resiliency Of Transportation Systems, Hannah Rose Russell

Doctoral Dissertations and Master's Theses

The National Science Foundation’s definition of resiliency is “the ability to prepare and plan for, absorb, recover from, or more successfully adapt to actual or potential adverse events” (National Science Foundation, 2016). While this definition is informative and useful, it lacks a quantitative reference. There is a need for a method of quantifying resilience to better plan and prepare for system wide disruptions. The research effort described herein provides a quantifiable measures of system resiliency, consistent with NSF’s definition. Fundamentally, a system disruption can be partitioned into five distinctive states: the stable pre-event state, the absorption state, the disrupted state, …

Redefining Creep: A Comprehensive Analysis Of Aviation Accident Survivability, Michael Knott

Doctoral Dissertations and Master's Theses

Given the sheer amount of flights that occur on a daily basis around the world, aviation accidents are going to occur. The principles ensuring that an accident is as safe as possible are considered aircraft survivability or crashworthiness which is analyzed using the acronym CREEP; Container, Restraint, Environment, Energy Absorption, and Post-Crash Factors. CREEP is used by investigators to analyze survivability after a crash, but has significant short falls. By only focusing on a crash, CREEP misses several survivability concepts applicable to aviation such as aircraft equipped with ejection seats, inflight environmental factors, and high …

Needs Based Assessment Of Agricultural Pilots In The Upper Midwest, Andrew Leonard, Cody Christensen, Jessie Hendricks

International Journal of Aviation, Aeronautics, and Aerospace

The agricultural aviation industry plays an increasingly important role in being able to meet the demands of food production on global level. With a limited ability to increase the amount of land used for food production, farmers will have to find a way to increase yields on current land. Unfortunately, the agricultural aviation industry is at risk of having a shortage of pilots able to operate its aircraft. With the current generation of agricultural pilots reaching retirement, operators are scrambling to find qualified pilots to fill their seats. The majority of operators indicated that when looking for a new pilot …

Managing Safety Risks In Airline Maintenance Outsourcing, Rajee Olaganathan Dr., Mark Miller Dr., Bettina M. Mrusek Dr.

International Journal of Aviation, Aeronautics, and Aerospace

The U.S aviation industry faced severe financial losses after the 9/11 incident. The financial loss that occurred between 2000 and 2009 in the U.S. alone was $54 billion dollars. One of the operational strategies adopted by air carriers to overcome this hurdle was to outsource aircraft maintenance. Initially, this was accomplished in both home and off-shore locations. Unionized labor relations in the US ultimately forced these organizations to outsource to non-unionized labor sources in foreign countries. However, due to the upsurge in accidents and incidents that resulting from maintenance failures, the concept of outsourcing maintenance became a subject of debate …

A Conceptual Framework For Valuating Airline Frequent Flyer Program Miles, Yi Gao

International Journal of Aviation, Aeronautics, and Aerospace

Frequent flyer programs of airlines have gradually evolved into a multi-billion dollar business over the years. Valuing frequent flyer program miles accurately and fairly has its practical implications both for airlines and members of frequent flyer programs. As a ground-breaking academic study dedicated to airline loyalty programs, this study aims to build a conceptual framework to guide the valuation of miles. Through comparing required miles for different award types with their equivalent cash prices, this study has successfully addressed the purchasing power of AAdvantage miles of American Airlines when they are used for award redemption. Not only can this study …

Towards A Hybrid Comfortable Passenger Cabin Interior For The Flying V Aircraft, Peter Vink, Thomas Rotte, Shabila Anjani, Chiara Percuoco, Roelof Vos

International Journal of Aviation, Aeronautics, and Aerospace

The Flying-V is a V-shaped airplane in development, which uses less fuel due its form. Passengers are in the oval cabin in the wing, which asks for an alternative design to the interior. At the same time there is a demand for more comfortable interiors.

80 students were asked to develop interior design ideas for this Flying V concept. A jury of experts selected four aircraft interior concepts and these were developed and a 1:1 scale mockup was made, with a hybrid interior. It included a chaise longue seats, the group space, beds and ‘staggered’ seats for the middle of …