Engineering Commons^™

Agenda, Hr Adaptation Forum

January 23, 2015: Storm Surge Modeling Tools for Planning and Response

No abstract provided.

Integrating The Curriculum Using A Small-Scale Hybrid Power Train, Mariaeugenia Salas Acosta

Theses and Dissertations

The project, a bench-scale hybrid electric powertrain system, is designed, analyzed and fabricated by students in six modules, starting in their sophomore year and culminating in their final semester as seniors. This complex project has been selected in order to integrate the core mechanical engineering courses: Mechanical Design, Thermodynamics, System Dynamics and Control, and Fluid Mechanics. A bench-scale hybrid-electric vehicle powertrain has sufficient complexity to involve all Mechanical Engineering disciplines and the simplicity to be built by students over the course of five semesters. The work is designed to test two hypotheses: 1) A long-term design project that integrates knowledge …

Theoretical Investigation Of Stabilities And Optical Properties Of Si12C12 Clusters, Xiaofeng F. Duan, Larry W. Burggraf

Faculty Publications

By sorting through hundreds of globally stable Si₁₂C₁₂ isomers using a potential surface search and using simulated annealing, we have identified low-energy structures. Unlike isomers knit together by Si–C bonds, the lowest energy isomers have segregated carbon and silicon regions that maximize stronger C–C bonding. Positing that charge separation between the carbon and silicon regions would produce interesting optical absorption in these cluster molecules, we used time-dependent density functional theory to compare the calculated optical properties of four isomers representing structural classes having different types of silicon and carbon segregation regions. Absorptions involving charge transfer between segregated …

Evapotranspiration From Natural Vegetation In The Central Valley Of California: Monthly Grass Reference-Based Vegetation Coefficients And The Dual Crop Coefficient Approach, Daniel J. Howes, Phyllis Fox, Paul H. Hutton

BioResource and Agricultural Engineering

Restoration activities in the Central Valley of California and elsewhere require accurate evapotranspiration information, which can then be used for a wide variety of surface and subsurface hydrologic evaluations. However, directly measuring evapotranspiration can be difficult or impossible depending on the evaluation’s time frame. Transferability of measured evapotranspiration in time and space is also necessary but typically requires a weather-based reference. For nonagricultural vegetation, there is at present time no standard reference, which makes the evaluation of a variety of vegetation types from different sources difficult and time-consuming. This paper examines several methods used to estimate evapotranspiration from native vegetation, …

Two-Dimensional Temperature Analysis Of Nuclear Fireballs Using Digitized Film, Robert C. Slaughter, Tyler R. Peery, John W. Mcclory

Faculty Publications

Researchers at Lawrence Livermore National Laboratory have begun digitizing technical films spanning the atmospheric nuclear testing operations conducted by the United States from 1945 through 1962. Each atmospheric nuclear test was filmed by Edgerton, Germeshausen, and Grier, Inc., using between 20 to 40 cameras per test. These technical film test data represent a primary source for advancing the knowledge of nuclear weapon output as well as the understanding of nonnuclear high-temperature gases. This manuscript outlines the procedures followed in order to perform two-dimensional temperature calculations for early time nuclear fireballs using digitized film. The digitized optical densities of the film …

Grafalgo - A Library Of Graph Algorithms And Supporting Data Structures, Jonathan Turner

All Computer Science and Engineering Research

This report provides an overview of Grafalgo, an open-source library of graph algorithms and the data structures used to implement them. The programs in this library were originally written to support a graduate class in advanced data structures and algorithms at Washington University. Because the code's primary purpose was pedagogical, it was written to be as straightforward as possible, while still being highly efficient. Grafalgo is implemented in C++ and incorporates some features of C++11. The library is available on an open-source basis and may be downloaded from https://code.google.com/p/grafalgo/. Source code documentation is at www.arl.wustl.edu/~jst/doc/grafalgo. While not designed as production …

Energy Use & Generation, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs on "Energy Use & Generation" from January 19, 2015.

Suborbital Spaceflight: A Student Team’S Plan To Send A Rocket To Space, Bryce Chanes, William Carpenter, Julio Benavides, Matthew Haslam, Brenda Haven

Aviation / Aeronautics / Aerospace International Research Conference

The Eagle Space Flight Team was created with the goal of becoming the first undergraduate team to design, build, and launch a rocket capable of suborbital spaceflight. In order to achieve this goal, the team will have to design a rocket capable of atmospheric flight at speeds over Mach 5 and launch it on one of the largest amateur rocket motors ever made. Over the next three years, the team will progress towards accomplishing this feat through a series of incremental test flights. Before the space flight, the team will build three sub-scale rockets designed to reach altitudes of 30,000’, …

Autonomous Satellite Recovery Vehicle, William Lewis, Devonte Grantham, Francisco Pastrana, Shane Williams, Joshua Moffett, Jessy Law, Kyle Ouellette, Janet Marnane

Aviation / Aeronautics / Aerospace International Research Conference

In collaboration with ERFSEDS, we would like to send a small satellite attached to a quad-copter as the payload for ERFSEDS rocket which will reach an altitude of 10,000 feet. The quad-copters objective will be to collect atmospheric data as it descends. Our plan is to 3-D print a new chassis for the quad-copters electronic components and arms that will allow the quad-copter to fold its arms inwards to meet the required space constraints. After launching the rocket, the satellite will be deployed at the target altitude and begin collecting data once jettisoned from the rocket. Once reaching 2,000 feet …

Atmospheric Weather Balloon For Near Space Research, Francisco F. Pastrana, Devonte Grantham, Shane M. Williams, Jessy Law, Jennifer Nason, Janet Marrnane

Aviation / Aeronautics / Aerospace International Research Conference

Atmospheric Weather Balloon for Near Space Research

The Society for S.P.A.C.E. has been working on the development of a weather balloon that will reach a height of 80 to 100 thousand feet and will collect data from the atmosphere. The weather balloon is attached to a Styrofoam box that contains an Arduino board controlling a set of sensors that will measure: temperature, humidity, atmospheric pressure, wind speed and direction.

The data will be collected and transmitted through an Xbee antenna that will provide us with remote monitoring capabilities. The data and images gathered will aid understanding of the characteristics and …

Nasa Human Exploration Rover Challenge, Gabriella E. Fortes, Zach Henney, Mo Sabliny, Johnnie Perry, Jessica Chow, Jessica Turcios, Aaron Taylor, Brenda Haven

Aviation / Aeronautics / Aerospace International Research Conference

NASA's Human Exploration Rover Challenge, held annually in at the Marshall Space Flight Center in Huntsville, Alabama, is an engineering design challenge that asks teams of student engineers to design a human-powered vehicle capable of traversing a simulated lunar surface. The rover must be able to be transported in a 5x5x5 foot cube, echoing the design constraint faced by the engineers who built the Lunar Roving Vehicles used by the astronauts of the later Apollo missions.

Microcontrollers In The Aviation Classroom, Padraig Houlahan

Aviation / Aeronautics / Aerospace International Research Conference

Modern commercial aircraft are increasingly dependent on digital technologies that detect sensor data and pilot control movements, interpret them, and then issue appropriate control signals to remote motors that move control surfaces. Because such technologies are innately complex, it would appear there is an unacceptably large academic burden on introducing them into the undergraduate pilot's curriculum .

However, in recent years there has been an explosion of interest in using micro-controllers in academic teaching (high-school and undergraduate levels) and in hobby applications, resulting in a large, online, freely available knowledgebase of techniques and solutions. Here, I demonstrate how easy it …

Unlocking The Mysteries Of Flight: From The Top Down, Juan Merkt

Aviation / Aeronautics / Aerospace International Research Conference

Traditionally, principles of flight are taught from the bottom-up. That is, we start by examining underlying causes (properties of air) and later move up to top consequences (aircraft performance). This traditional approach is analogous to that used by airplane designers and is most obvious in theory of flight textbooks for pilots. The problem with a bottom-up approach is that it introduces basic concepts as isolated “parts” without providing a “big picture” context. This can lead to poor understanding among student pilots. I suggest an opposite approach. Rather than starting with the underlying causes of flight, we can unravel basic principles …

The Value Of Professional Security Industry Certifications, Daniel Benny Ph.D

Aviation / Aeronautics / Aerospace International Research Conference

In the security and aviation community there are many professional security certifications that can be achieved in all disciplines of security. Those pertinent to aviation will be explored.

Low Fidelity Flight Simulation In Collegiate Aviation, Vladimir N. Risukhin

Aviation / Aeronautics / Aerospace International Research Conference

Aviation college pilot training programs, lessons and exercises contain portions that do not require training in sophisticated and highly expensive full flight simulators and flight training devices (FTD) with high fidelity of simulation, or in real aircraft flights. Relatively inexpensive personal-computer-based flight simulation facilities named low fidelity simulators (LFS) can boost development of aircraft pilots’ cognitive and behavioral skills. The paper attempts to reveal how the LFS can support aviation college flight training and research activities. In the Western Michigan University College of Aviation, peer mentoring technique proven to be helpful in higher education institutions has been applied to flight …

Assessing The Commercial Aviation Impact Of The Year 2000 Open Skies Agreements Between The United States And African Countries With Longstanding Flights, Tyler B. Spence, Micah Walala, Richard O. Fanjoy

Aviation / Aeronautics / Aerospace International Research Conference

The U.S. started a comprehensive campaign towards Open Skies agreement in 1992. The major benefits of Open sky agreement are reported to include increase of passenger and cargo volume between partners. This study analyzes passenger traffic and cargo volume between six African countries that have had commercial aviation with the U.S. since 1990 to 2014, and with direct flights between them. Two of the countries have had no Open Skies agreement with the U.S., while four have had Open Skies agreement beginning in 2000. A multi linear modeling process was applied on the two categories to determine whether there is …

Thinking Rather Than Panicking About The Current Drone Threat, Tom Foley, Tyrone Groh

Aviation / Aeronautics / Aerospace International Research Conference

Originally titled "UAS Threats in Sport Venues," the authors opted to expand their focus to better to all threats from UASs, and to encourage better preparation for and responses to such threats. Foley and Groh discuss different strategies.

Aviation Security Impacts Of Meteorological And Climatic Disruption, Melanie Wetzel

Aviation / Aeronautics / Aerospace International Research Conference

Commercial and military flight operations are frequently imperiled or disrupted by meteorological conditions. Severe weather events and climate-related factors create aviation security impacts on airport siting and reliability, human safety, economic stability, military defense strategy, aircraft routing and computer systems vulnerability. Climate trends have been associated with increased frequency of storm surge incursions at coastal airports, intense snowfall accumulations, runway closures due to rainstorm runoff, extended periods of fog/stratus restrictions and severe-weather related risk from lightning, hail and icing. The economic and safety impacts of these events are being incorporated into long-term planning by the U.S. Department of Defense (DoD), …

Airport Sms Software Analysis, Steven Goetz, Matt Romero, Yamini Gowda, Alyssa Manning

Aviation / Aeronautics / Aerospace International Research Conference

Historically, high risk industries such as aviation have attempted to respond to accidents by fixing what they find after the investigation is complete and therefore represents a reactive approach to an accident event. For many years, the industry has tried to become more proactive to these events by seeking out problems and correcting them before an accident occurs. A Safety Management System is a detailed and regimented process by which any high risk industry can try to become proactive in accident prevention. There are many tools that can be utilized to help develop this framework and accomplish this preventative goal. …

Developing A Robust Balance For Wingsuit Aerodynamic Research, Timothy A. Sestak

Aviation / Aeronautics / Aerospace International Research Conference

Research on wingsuit aerodynamics requires specialized wind tunnel equipment. There is the potential for the relatively large ram-air inflated fabric airfoils being examined to flap and oscillate uncontrolled in the wind tunnel airflow. This chaotic combination of motion and forces could damage the fragile precision balances currently used. Due to the relatively recent development of wingsuit flight as an active sport, there is very little background literature on wingsuit aerodynamics, wingsuit testing, and the equipment and sensors required. A new balance design, able to accurately measure and record basic lift and drag forces while also being able to withstand the …

Aerospace Renaissance – Ripe For Research To Impact The Industry, Constantine M. Koursaris, Brig. Gen. Robert E. Mansfield Jr. (Ret.)

Aviation / Aeronautics / Aerospace International Research Conference

The Center for Aviation and Aerospace Leadership (CAAL) was founded in 2008 to capture, create, and share relevant information on leadership in the aviation and aerospace industry.

The AIR is developed and published in collaboration with the Aerospace Industries Association and includes:

• Information on the status of aerospace manufacturing in the United States and state of the economy

• An in-depth review of sales across the various sectors of the industry, employment trends, key international trade statistics, financial information on the industry & major aerospace firms, trends to watch, and a forecast for the future based on a review …

The Implementation Of Safety Management Systems In Maintenance Operations, Daniel H. Siao

Aviation / Aeronautics / Aerospace International Research Conference

Literature for Safety Management Systems (SMS) that apply to flight operations is abundant, but there is a limited supply of SMS-related literature for maintenance operations. The FAA emphatically states on its website that safety is the “foundation of everything we do,” and this is reflected in the FAA Flight Plan, where the general tenor of this document is increasing safety. However, while there is ample mention of flight safety, there is no mention of maintenance-related safety in the FAA Flight Plan.

Even though the benefits of SMS are well established, it is difficult for maintenance facilities—especially small repair stations—to justify …

Unmanned Aerial Systems In The Fire Service: Concepts And Issues, John C. Griffith, Ronald T. Wakeham

Aviation / Aeronautics / Aerospace International Research Conference

The presentation will summarize current thinking on the application of Unmanned Aerial Systems (UASs) in the Fire Service. Potential use of UASs to save lives, provide safety and save property has generated preliminary research in three major areas of the fire service to include aviation, structure and wildland scenarios. Roadblocks to the effective use of this technology will also be discussed to include possible command and control issues and governmental actions to limit the use of UASs due to aviation safety concerns. The presenters will recommend areas of future research and steps to implement this technology in the fire service. …

Solving An Age-Old Debate: What Really Controls Altitude And Airspeed?, Juan Merkt

Aviation / Aeronautics / Aerospace International Research Conference

Mismanagement of altitude and/or airspeed is linked to the top three causes of fatal aviation accidents: loss of control inflight (LOCI), controlled flight into terrain (CFIT), and runway excursions during approach and landing (RE). Clearly, the ability to control altitude and airspeed is a critical skill that all pilots must learn. Yet, differing opinions of how the throttle and elevator work to control altitude and speed can lead to confusion in the cockpit. Energy management is an effective approach to learn how the controls work. Unfortunately energy principles have not found their way into primary flight training. To help bridge …

Third Party Airport Crash Risk Model For Non-Towered Airports, Christian Salmon

Aviation / Aeronautics / Aerospace International Research Conference

This research leverages the objective accident data record towards an individual and societal 3^rd party “external” airport risk model for aircraft operations that crash while operating at non-towered airports.

Small aircraft, specifically Part 91, operating at non-towered airports have a crash rate estimated at 10-fold that of commercial operations. Given the nature of the typically non-towered airport, situated in close physical proximity with residential structures, this exposes residents to substantive risk of injury and death due to aircraft crashing.

A 3^rd party risk model that maps risk of injury, death and percent structural damage will enable informed decisions …

Human Factors Considerations In Autonomous Lethal Unmanned Aerial Systems, Kristine Kiernan

Aviation / Aeronautics / Aerospace International Research Conference

The United States military is committed to the development of complete autonomy in unmanned vehicles, including armed unmanned aerial systems (UAS). The design and deployment of autonomous lethal UAS raises ethical issues that have implications for human factors. System design, procedures, and training will be impacted by the advent of autonomous lethal UAS. This paper will define relevant vocabulary, review the literature on robot ethics as it applies to the military setting, discuss various perspectives in the research community, address levels of UAS autonomy, and discuss implications for operator training, responsibility, and human-machine interaction. Familiarity with these ethical issues and …

Insights Into Uas Accidents And Incidents, Robert Joslin

Aviation / Aeronautics / Aerospace International Research Conference

The proliferation and extension of unmanned aircraft systems from military to civil and public use applications has rapidly outpaced the safety analysis that is normally associated with the introduction of a new and novel aircraft. Insights into the types of anomalous events associated with accidents and incidents involving civil and public use unmanned aircraft systems operating in the National Airspace System were derived from an information synthesis of archival publically available reports from the FAA Preliminary Reports of Unmanned Aircraft System Accidents and Incidents database, as recorded in the Aviation Safety Information and Analysis Sharing system. The vast majority of …

Use Of Virtual Environments For Simulation Of Accident Investigation, Scott Burgess, Katherine Moran

Aviation / Aeronautics / Aerospace International Research Conference

Aircraft accident investigation requires extensive theoretical and methodological knowledge as well as hands-on application. While there are a handful of training centers that offer crash site reconstructions as training aids, these facilities offer limited static tools that can only be accessed by a minimal number of trainees who have flexible work schedules and access to available budgetary resources for travel, lodging and tuition to attend what is generally not-for-credit hands-on training. The use of a virtual interactive aircraft crash training environment can deliver a virtual crash laboratory to an infinite number of trainees, worldwide, provided computer technology is present. The …

Evaluation Of Vibration Profiles For Uld Dollies At Air-Cargo Sorting Hubs, Jay Singh, Paul Singh, Koushik Saha

Journal of Applied Packaging Research

This study measured and analyzed the vibration characteristics of an important component of the air package shipping environment which has not been previously studied or included in the pre-shipment testing of packages. This is the movement of packages between aircraft after they are flown in to an airport-hub and being taken into a facility to conduct a sort, or after being sorted as they are transferred back on to aircraft. These transfers at airport-hubs between trucks, building sortation facilities and aircraft are done using material handling equipment called “dollies” or carts. These carts often are connected with each other into …

Unmanned Insecurity: The Safety And Privacy Issues Of Unmanned Aircraft Information Assurance, Donna A. Dulo Ph.D.

Aviation / Aeronautics / Aerospace International Research Conference

Information assurance and computer security are foundational paradigms in ground based information systems. However, in the aerial realm of unmanned systems, information security often takes the proverbial back seat to high visibility issues such as safety and privacy. Yet, a secure unmanned aircraft is a basic tenant of safety and privacy in the operational arena. Information assurance and security that are enveloped into an unmanned aircraft protect the systems data, communications, as well as internal operations and permeates not only the aircraft’s systems, but also the system’s interactions with satellites, ground stations, and other aerial entities that share data and …