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A Diffraction Model for Prediction of Radar Signal Attention by a Rocket Exhaust Plume
Title
A Diffraction Model for Prediction of Radar Signal Attention by a Rocket Exhaust Plume.
Creator
Sphar, Douglas Harrison, Mathews, B.E., Engineering
Abstract / Description
Florida Technological University College of Engineering Thesis; This report documents the development of a method of estimating the signal attenuation induced by a rocket exhaust plume. The method is applicable to the early system design phase of high energy solid propellant rockets that produce highly ionized exhaust plumes. The method is based on the premise that when a plume is highly ionized, observed signal levels can be explained by assuming the signal propagates around the plume. A...
Show moreFlorida Technological University College of Engineering Thesis; This report documents the development of a method of estimating the signal attenuation induced by a rocket exhaust plume. The method is applicable to the early system design phase of high energy solid propellant rockets that produce highly ionized exhaust plumes. The method is based on the premise that when a plume is highly ionized, observed signal levels can be explained by assuming the signal propagates around the plume. A simple diffraction at a straight edge model is developed and compared to measured data. The report also provides an overview of exhaust plume electromagnetics and surveys prediction techniques.
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Date Issued
1972
Identifier
CFR0003481, ucf:53035
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFR0003481
NETWORK PERFORMANCE MANAGEMENT USING APPLICATION-CENTRIC KEY PERFORMANCE INDICATORS
Title
NETWORK PERFORMANCE MANAGEMENT USING APPLICATION-CENTRIC KEY PERFORMANCE INDICATORS.
Creator
McGill, Susan, Shumaker, Randall, University of Central Florida
Abstract / Description
The Internet and intranets are viewed as capable of supplying "Anything, Anywhere, Anytime" and e-commerce, e-government, e-community, and military C4I are now deploying many and varied applications to serve their needs. Network management is currently centralized in operations centers. To assure customer satisfaction with the network performance they typically plan, configure and monitor the network devices to insure an excess of bandwidth, that is overprovision. If this proves uneconomical...
Show moreThe Internet and intranets are viewed as capable of supplying "Anything, Anywhere, Anytime" and e-commerce, e-government, e-community, and military C4I are now deploying many and varied applications to serve their needs. Network management is currently centralized in operations centers. To assure customer satisfaction with the network performance they typically plan, configure and monitor the network devices to insure an excess of bandwidth, that is overprovision. If this proves uneconomical or if complex and poorly understood interactions of equipment, protocols and application traffic degrade performance creating customer dissatisfaction, another more application-centric, way of managing the network will be needed. This research investigates a new qualitative class of network performance measures derived from the current quantitative metrics known as quality of service (QOS) parameters. The proposed class of qualitative indicators focuses on utilizing current network performance measures (QOS values) to derive abstract quality of experience (QOE) indicators by application class. These measures may provide a more user or application-centric means of assessing network performance even when some individual QOS parameters approach or exceed specified levels. The mathematics of functional analysis suggests treating QOS performance values as a vector, and, by mapping the degradation of the application performance to a characteristic lp-norm curve, a qualitative QOE value (good/poor) can be calculated for each application class. A similar procedure could calculate a QOE node value (satisfactory/unsatisfactory) to represent the service level of the switch or router for the current mix of application traffic. To demonstrate the utility of this approach a discrete event simulation (DES) test-bed, in the OPNET telecommunications simulation environment, was created modeling the topology and traffic of three semi-autonomous networks connected by a backbone. Scenarios, designed to degrade performance by under-provisioning links or nodes, are run to evaluate QOE for an access network. The application classes and traffic load are held constant. Future research would include refinement of the mathematics, many additional simulations and scenarios varying other independent variables. Finally collaboration with researchers in areas as diverse as human computer interaction (HCI), software engineering, teletraffic engineering, and network management will enhance the concepts modeled.
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Date Issued
2007
Identifier
CFE0001818, ucf:47371
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0001818
The influence of perceived organizational support, perceived coworker support (&) debriefing on work-related compassion satisfaction, burnout, and secondary traumatic stress in Florida public safety personnel
Title
The influence of perceived organizational support, perceived coworker support (&) debriefing on work-related compassion satisfaction, burnout, and secondary traumatic stress in Florida public safety personnel.
Creator
Miller, Anastasia, Unruh, Lynn, Zhang, Ning, Wharton, Tracy, Liu, Albert Xinliang, University of Central Florida
Abstract / Description
The purpose of this study was to examine the relationships between perceived organizational support, perceived coworker support, and debriefing on the one hand, and compassion satisfaction, burnout, and secondary traumatic stress on the other hand in Florida law enforcement, fire, emergency medical services, and dispatch public safety workers. In order to explore the relationships between these constructs, the research questions examined the relationships of the work environment of Florida...
Show moreThe purpose of this study was to examine the relationships between perceived organizational support, perceived coworker support, and debriefing on the one hand, and compassion satisfaction, burnout, and secondary traumatic stress on the other hand in Florida law enforcement, fire, emergency medical services, and dispatch public safety workers. In order to explore the relationships between these constructs, the research questions examined the relationships of the work environment of Florida public safety by administering surveys gauging perceived organizational support, perceived coworker support, psychological resilience, and debriefing activities that the personnel participate in. The Professional Quality of Life: Compassion Satisfaction and Compassion Fatigue Version 5 was also sent out to establish the self-reported levels of compassion satisfaction, burnout, and secondary traumatic stress. The study found that there were differences in the levels of compassion satisfaction, burnout, and secondary traumatic stress between the public safety fields. It also found that there was a positive relationship between the presence of perceived organizational support, perceived coworker support, psychological resilience, and debriefing activities on at least one of the constructs of compassion satisfaction, burnout, or secondary traumatic stress within the different public safety fields. This study furthers the literature by being the first study to compare the four different public safety fields in the state of Florida and with regards to those constructs.
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Date Issued
2016
Identifier
CFE0006357, ucf:51533
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0006357