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Articles 1 - 12 of 12

Full-Text Articles in Social and Behavioral Sciences

Comparison Of Three Angle Of Attack (Aoa) Indicators: A Usability Study, Camilo Jimenez Nov 2013

Comparison Of Three Angle Of Attack (Aoa) Indicators: A Usability Study, Camilo Jimenez

Dissertations and Theses

Angle of Attack (AOA) is an important aeronautical concept used to understand the performance status of an aircraft during different flight stages. The Federal Aviation Administration (FAA) has indicated the importance of developing and encouraging the use of affordable AOA based systems to increase inflight safety. Embry-Riddle Aeronautical University's flight department decided to install AOA indicators in its fleet of Cessna 172S, to increase safety and to help student pilots better understand this important concept. This paper presents a review of AOA, visual display design principles, and usability. This experimental study examined three different AOA indicators provided by the ...


Evidence Supporting Treatment Practice Based Delineation Of Stormwater Runoff Zones, Jacob J. Gorski Oct 2013

Evidence Supporting Treatment Practice Based Delineation Of Stormwater Runoff Zones, Jacob J. Gorski

Dissertations and Theses

Particles mobilized by stormwater negatively affect receiving surface waters. Stormwater best management practices (BMPs) can reduce solids along with associated pollutants in runoff but engineers and environmental managers have been long vexed by the problem of choosing the optimal BMP for a given situation. A common BMP process for solids removal is sedimentation. This thesis addresses the question of whether the effectiveness (and thus choice) of a sedimentation device can be estimated (and thus optimized) from the particle size properties of runoff, which, in turn, could be associated with specific runoff zones or land uses. Presented here is a series ...


Trust-But-Verify: Guaranteeing The Integrity Of User-Generated Content In Online Applications, Akshay Dua Sep 2013

Trust-But-Verify: Guaranteeing The Integrity Of User-Generated Content In Online Applications, Akshay Dua

Dissertations and Theses

Online applications that are open to participation lack reliable methods to establish the integrity of user-generated information. Users may unknowingly own compromised devices, or intentionally publish forged information. In these scenarios, applications need some way to determine the "correctness" of autonomously generated information. Towards that end, this thesis presents a "trust-but-verify" approach that enables open online applications to independently verify the information generated by each participant. In addition to enabling independent verification, our framework allows an application to verify less information from more trustworthy users and verify more information from less trustworthy ones. Thus, an application can trade-off performance for ...


The Effects Of Ethical Leadership And Organizational Safety Culture On Safety Outcomes, David Ronald Freiwald Sep 2013

The Effects Of Ethical Leadership And Organizational Safety Culture On Safety Outcomes, David Ronald Freiwald

Dissertations and Theses

This dissertation investigated the relationship among ethical leadership, an ethical workplace climate, safety culture, safety behaviors, and measured safety outcomes of workers in the high reliability organizations of aviation and healthcare. The primary objective was to develop a model linking these factors and assess their fit within the model. A secondary objective was to examine differences between the two populations. In this study, a 101-item instrument was used to collect and analyze employee responses on ten factors comprising the model. Structural equation modeling – path analysis was used for testing and evaluating relations using a combination of statistical analysis and qualitative ...


Improving Vehicle Trip Generation Estimations For Urban Contexts: A Method Using Household Travel Surveys To Adjust Ite Trip Generation Rates, Kristina Marie Currans Jul 2013

Improving Vehicle Trip Generation Estimations For Urban Contexts: A Method Using Household Travel Surveys To Adjust Ite Trip Generation Rates, Kristina Marie Currans

Dissertations and Theses

The purpose of this research is to develop and test a widely available, ready-to-use method for adjusting the Institute of Transportation Engineers (ITE) Trip Generation Handbook vehicle trip generation estimates for urban context using regional household travel survey data. The ITE Handbook has become the predominant method for estimating vehicle trips generated by different land uses or establishment, providing a method for data collection and vehicle trip estimation based on the size of the development (e.g. gross square footage, number of employees, number of dwelling units). These estimates are used in traffic impact analysis to assess the amount of ...


The Effects Of Sensor Performance As Modeled By Signal Detection Theory On The Performance Of Reinforcement Learning In A Target Acquisition Task, Nate Quirion Jul 2013

The Effects Of Sensor Performance As Modeled By Signal Detection Theory On The Performance Of Reinforcement Learning In A Target Acquisition Task, Nate Quirion

Dissertations and Theses

Unmanned Aerial Systems (UASs) today are fulfilling more roles than ever before. There is a general push to have these systems feature more advanced autonomous capabilities in the near future. To achieve autonomous behavior requires some unique approaches to control and decision making. More advanced versions of these approaches are able to adapt their own behavior and examine their past experiences to increase their future mission performance. To achieve adaptive behavior and decision making capabilities this study used Reinforcement Learning algorithms. In this research the effects of sensor performance, as modeled through Signal Detection Theory (SDT), on the ability of ...


Understanding Travel Modes To Non-Work Destinations: Analysis Of An Establishment Survey In Portland, Oregon, Christopher D. Muhs Jun 2013

Understanding Travel Modes To Non-Work Destinations: Analysis Of An Establishment Survey In Portland, Oregon, Christopher D. Muhs

Dissertations and Theses

During the past three decades, research in travel behavior has generally proceeded from broad-level, aggregate analysis of mode share--the proportions of walking, bicycling, transit, and vehicle travel occurring in traffic analysis zones, census tracts, neighborhood, or other geographical units--to fine-grained, disaggregate analysis of mode choices and other trip-making attributes at the individual level. One potential issue is whether there are differences in the types of conclusions drawn from results of analyses performed at these different levels, as these results directly inform transportation planning and policy.

This thesis aims in part to confirm whether the types of conclusions drawn from different ...


A Naturalistic Study Of Long-Term Working Memory Capacity For Meaningful Visual And Auditory Stimuli, Joseph M. Jaworski Apr 2013

A Naturalistic Study Of Long-Term Working Memory Capacity For Meaningful Visual And Auditory Stimuli, Joseph M. Jaworski

Dissertations and Theses

The purpose of this study was to explore long-term working memory in experts in an information-rich, dynamic domain. Of particular interest were strategies experts use to enhance long-term working memory capacity when working with verbal versus aural information. Three air traffic control instructors participated in four complex air traffic control scenarios, two radar scenarios in which information was presented visually and two non-radar scenarios in which information presentation was purely aural. Participants recalled traffic situation information at two points during and at the end of each scenario. Recall data for each scenario type were assessed in terms of evidence about ...


Spatial Cognition Differences Between Men And Women In Spatial Cue Environments During Flight Simulation, Heidi Crystal Kim Apr 2013

Spatial Cognition Differences Between Men And Women In Spatial Cue Environments During Flight Simulation, Heidi Crystal Kim

Dissertations and Theses

Ground reference maneuvers are an important component of pilot training. In order to perform these maneuvers, pilots rely on cues from the environment to determine where their aircraft is in relation to objects on the ground. This process requires a high degree of spatial cognition, which refers to the cognitive processes used to orient oneself in space. Two factors that can influence spatial cognition in the context of aviation ground reference maneuvers are the availability of spatial cues and the biological sex of the pilot. Research suggests spatial cues aid in the identification of potentially dangerous objects. In the context ...


Comparison Of Voice And Text Atc Communications In The Cockpit For Esl Pilots, Shannon Marie Cummings Apr 2013

Comparison Of Voice And Text Atc Communications In The Cockpit For Esl Pilots, Shannon Marie Cummings

Dissertations and Theses

Throughout the course of any flight, pilots and air traffic control (ATC) are in constant radio communication regarding the position and route of the aircraft. Effective pilot-ATC communication helps to increase safety by increasing the situation awareness of both the pilot and controller. In the current pilot-ATC communication system, auditory messages are sent back and forth between the pilot and controller. The nature of these auditory messages makes them highly susceptible to memory and information processing limitations. This effect is magnified when dealing with pilots who have learned English as a second language (ESL) as people have more difficulty processing ...


Analyzing Communication Performance: A Comparison Of Native-English Speakers And Non-Native English Speakers, Tami Marie Gibbs Mar 2013

Analyzing Communication Performance: A Comparison Of Native-English Speakers And Non-Native English Speakers, Tami Marie Gibbs

Dissertations and Theses

The purpose of this thesis was to research how well native and non-native English speakers proficiently communicated using learned Air Traffic Control (ATC) phraseology, and how well they communicated using plain phraseology. The participants in this study were Embry-Riddle Aeronautical University (ERAU) flight students at the Daytona Beach campus. This study used a sample of students from English-speaking countries and a sample of students from non-English speaking countries. A quantified study of the types of communication errors was conducted by listening to a pre-defined amount of voice communications between the Daytona Beach International Airport tower facility and ERAU flight student ...


Pre-Exposure Training As A Means To Reduce Vection Induced Symptoms Of Motion Sickness, Nicholas James Stapleton Mar 2013

Pre-Exposure Training As A Means To Reduce Vection Induced Symptoms Of Motion Sickness, Nicholas James Stapleton

Dissertations and Theses

The focus of this study was designed to empirically examine the effect of inducing mild motion sickness as an ameliorative to a more severe motion sickness exposure. Twenty-seven participants were selected for this study based upon their susceptibility to motion sickness, that is, only people who were determined to be motion susceptible were tested. All participants were exposed to a motion sickness-inducing environment. Eighteen participants were trained to adapt to motion sickness by exposure to a milder motion sickness-inducing environment, ending either 6 hours or 24 hours prior to the more severe motion test environment.

Participants during the pre-exposure experimental ...