Evaluating Launch Vehicle / Reentry Vehicle (Lv/Rv) Separation Concepts, 2015 The MITRE Corporation
Evaluating Launch Vehicle / Reentry Vehicle (Lv/Rv) Separation Concepts, Zheng Tao, Ganghuai Wang, Tudor Masek, Thomas J. St. Clair
Space Traffic Management Conference
Launch Vehicle/Reentry Vehicle (LV/RV) operations are expected to increase across the National Airspace System (NAS) as their reliability and availability improve. LV/RV designs and the industry landscape have vastly changed since the 1960’s, and the Federal Aviation Administration’s (FAA) methods for handling these operations need to evolve to support the expected growth. Currently, large amounts of airspace are segregated for every LV/RV operation. This increases costs for NAS users and may limit LV/RV opportunities. The FAA’s NextGen office recently proposed two more efficient separation concepts for LV/RV operations called Space Transition ...
A Method Of Mapping Sinkhole Susceptibility Using A Geographic Information System: A Case Study For Interstates In The Karst Counties Of Virginia, 2015 University of Virginia - Main Campus
A Method Of Mapping Sinkhole Susceptibility Using A Geographic Information System: A Case Study For Interstates In The Karst Counties Of Virginia, Alexandra L. Todd, Lindsay Ivey-Burden
Sinkhole Conference 2015
Karst terrain is landscape underlain by limestone that has been chemically dissolved by acidic groundwater, producing subsurface voids that pose risks for sinkholes if the overlaying soils can no longer support their own weight and collapse. The western counties of Virginia are heavy in karst due to their natural, geographic boundary of the western Ridge Province and the eastern Blue Ridge Mountain Range. As a result, the Commonwealth of Virginia Hazard Mitigation Plan recommends that the Virginia Department of Transportation (VDOT) develop a method to determine the roadways and regions most susceptible to experiencing sinkholes, in an effort to reduce ...
From Human Reliability To Resilience & System Performance - Adapting To A Changing World, 2015 World Maritime University
From Human Reliability To Resilience & System Performance - Adapting To A Changing World, Gesa Praetorius
Presentation given at the IALA Human Factors in VTS workshop, 11 October 2015, Gothenburg, Sweden.
A Machine Learning Approach To Post-Market Surveillance Of Medical Devices, 2015 Yale University
A Machine Learning Approach To Post-Market Surveillance Of Medical Devices, Jonathan Bates, Shu-Xia Li, Craig Parzynski, Ronald Coifman, Harlan Krumholz, Joseph Ross
Yale Day of Data
Post-market surveillance is a collection of processes and activities used by product manufacturers and regulators, such as the U.S. Food and Drug Administration (FDA) to monitor the safety and effectiveness of medical devices once they are available for use “on the market”. These activities are designed to generate information to identify poorly performing devices and other safety problems, accurately characterize real-world device performance and clinical outcomes, and facilitate the development of new devices, or new uses for existing devices. Typically, a device is monitored by comparing adverse events in the exposed population to a matched unexposed population. This research ...
Requirements For A Computer Code System For The Development And Maintenance Of Target Sets, 2015 University of Tennessee - Knoxville
Requirements For A Computer Code System For The Development And Maintenance Of Target Sets, Christopher Chwasz
In the field of commercial nuclear reactor security, the concept of target sets has matured since its invention in the late 1980s and early 1990s to the codification of target set regulations by the United States Nuclear Regulatory Commission in 2009 and publishing of official guidance in 2010. Target sets have evolved into a complex and useful tool to develop and test a protective strategy. By their definition, target sets are the “minimum combination of equipment or operator actions which, if all are prevented from performing their intended safety function or prevented from being accomplished, would likely result in significant ...
Developing An Optimal Model For Infant Home Visitation, 2015 University of Tennessee - Knoxville
Developing An Optimal Model For Infant Home Visitation, Isaac Atuahene
The United States, Great Britain, Denmark, Canada and many other countries have accepted home visitation (HV) as a promising strategy for interventions for infants after births and for their mothers. Prior HV studies have focused on theoretical foundations, evaluations of programs, cost/benefit analysis and cost estimation by using hospital/payer/insurance data to prove its effectiveness and high cost. As governments and private organizations continue to fund HVs, it is an opportune time to develop and formulate operations research (OR) models of HV coverage, quality and cost so they might be used in program implementation as done for adult ...
Applying Fram To Enhance Formal Safety Assessment In The Maritime Domain, 2015 World Maritime University
Applying Fram To Enhance Formal Safety Assessment In The Maritime Domain, Gesa Praetorius
Presentation given at the Functional Resonance Analysis Method (FRAM) workshop in Olten, Switzerland, 12 June 2015.
Topsis As A Method To Populate Risk Matrix Axes, 2015 Western New England UniversityWestern New England University
Topsis As A Method To Populate Risk Matrix Axes, Christian Salmon, Mohammadsadegh Mobin, Afshan Roshani
This research utilizes TOPSIS (a Multi-Criteria ranking methodology) to populate the axes of a risk matrix when modeling risk exposure onboard commercial fishing vessels with the intent to identify mitigating interventions in low risk settings for possible transfer to high risk settings. The specific hazard of interest is the release of refrigerants into confined spaces onboard commercial fishing vessels. The metrics of risk are: 1) expectation that refrigerants are released onboard vessels, and 2) consequence of releases that have occurred. To model expectation: data were collected on the United States’ commercial fisheries, including location and number of participating vessels. These ...
An Assessment Of The Performances Of Several Univariate Tests Of Normality, 2015 Florida International University
An Assessment Of The Performances Of Several Univariate Tests Of Normality, James Olusegun Adefisoye
FIU Electronic Theses and Dissertations
The importance of checking the normality assumption in most statistical procedures especially parametric tests cannot be over emphasized as the validity of the inferences drawn from such procedures usually depend on the validity of this assumption. Numerous methods have been proposed by different authors over the years, some popular and frequently used, others, not so much. This study addresses the performance of eighteen of the available tests for different sample sizes, significance levels, and for a number of symmetric and asymmetric distributions by conducting a Monte-Carlo simulation. The results showed that considerable power is not achieved for symmetric distributions when ...
Risk Management In Motorway Ppp Projects: Empirical-Based Guidelines, 2015 Polytechnic of Bari
Risk Management In Motorway Ppp Projects: Empirical-Based Guidelines, Nunzia Carbonara, Nicola Costantino, Louis Gunnigan, Roberta Pellegrino
This paper deals with the topic of risk management in Public–Private Partnership (PPP). The analysis of the related literature reveals that risks must be analyzed and managed on a context-speciﬁc approach, and that there is a lack of a comprehensive study on the appropriate risk mitigation strategies for each risk embedded in PPP projects. Focusing on the transport sector, based on the results of a Delphi survey, the paper provides guidelines for both public and private parties in deﬁning a list of signiﬁcant risks in PPP motorway projects, and identifying for them both the effective allocation and the suitable ...
Third Party Airport Crash Risk Model For Non-Towered Airports, 2015 Western New England University
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 3rd 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 3rd party risk model that maps risk of injury, death and percent structural damage will enable informed decisions ...
Strengthening The Rail Mode Of Transport By Condition Based Preventive Maintenance, 2015 German Aerospace Center
Strengthening The Rail Mode Of Transport By Condition Based Preventive Maintenance, René Schenkendorf, Jörn Groos, Lars Johannes
No abstract provided.
Applying Probabilistic Methods To The Nato Military Load Classification System For Bridges, 2014 The University of Western Ontario
Applying Probabilistic Methods To The Nato Military Load Classification System For Bridges, Andrew J. Macdonald
Electronic Thesis and Dissertation Repository
Military vehicles frequently use civilian bridges. The loading effects of military vehicles, both wheeled and tracked, are specific and different than those of civilian vehicles in normal traffic. Calibration to determine appropriate load factors for military loading of civilian bridges has not been fully performed and the corresponding levels of safety have not been quantified. This lack of calibration prevents the implementation of limit state design methods for military bridges and the evaluation bridges for military loading. This thesis quantifies probabilistically the single lane traffic load effects on interior girders of simply supported slab-on-girder bridges for three military vehicles in ...
Security Analysis On Network Systems Based On Some Stochastic Models, 2014 University of New Orleans
Security Analysis On Network Systems Based On Some Stochastic Models, Xiaohu Li
University of New Orleans Theses and Dissertations
Due to great effort from mathematicians, physicists and computer scientists, network science has attained rapid development during the past decades. However, because of the complexity, most researches in this area are conducted only based upon experiments and simulations, it is critical to do research based on theoretical results so as to gain more insight on how the structure of a network affects the security. This dissertation introduces some stochastic and statistical models on certain networks and uses a k-out-of-n tolerant structure to characterize both logically and physically the behavior of nodes. Based upon these models, we draw several illuminating results ...
Plutonium Worlds. Fast Breeders, Systems Analysis And Computer Simulation In The Age Of Hypotheticality, 2014 Leuphana University Lüneburg
Plutonium Worlds. Fast Breeders, Systems Analysis And Computer Simulation In The Age Of Hypotheticality, Sebastian Vehlken
This article examines the media history of one of the hallmark civil nuclear energy programs in Western Germany – the development of Liquid Metal Fast Breeder Reactor (LMFBR) technology. Promoted as a kind of perpetuum mobile of the Atomic Age, the "German Manhattan Project" not only imported big science thinking. In its context, nuclear technology was also put forth as an avantgarde of scientific inquiry, dealing with the most complex and 'critical' technological endeavors. In the face of the risks of nuclear technology, German physicist Wolf Häfele thus announced a novel epistemology of
"hypotheticality". In a context where traditional experimental engineering ...
Experimental And Numerical Investigation Of The Mechanism Of Blast Wave Transmission Through A Surrogate Head, 2014 University of Nebraska-Lincoln
Experimental And Numerical Investigation Of The Mechanism Of Blast Wave Transmission Through A Surrogate Head, Yi Hua, Praveen Akula, Linxia Gu, Jeff Berg, Carl A. Nelson
Mechanical & Materials Engineering Faculty Publications
This work is to develop an experiment-validated numerical model to elucidate the wave transmission mechanisms through a surrogate head under blast loading. Repeated shock tube tests were conducted on a surrogate head, i.e., water-filled polycarbonate shell. Surface strain on the skull simulant and pressure inside the brain simulant were recorded at multiple locations. A numerical model was developed to capture the shock wave propagation within the shock tube and the fluid-structure interaction between the shock wave and the surrogate head. The obtained numerical results were compared with the experimental measurements. The experiment-validated numerical model was then used to further ...
Cooperative Construction In Schools In California, 2014 California Polytechnic State University - San Luis Obispo
Cooperative Construction In Schools In California, John Mauck Donley
Master's Theses and Project Reports
Cooperative Construction in Schools in California
John M. Donley
The construction industry has lost efficiency since 1964, while becoming increasingly more litigious. Schools in California can ill afford the time to allow the construction industry time to fully evolve. It may take years or decades to fully improve the efficiency of, and reduce the conflict within the construction industry.
At the same time, the construction industry has developed new processes to improve efficiency and reduce conflict. These processes are beginning to be broadly embraced by the industry. They all contain cooperative elements. Taken together they represent a new organizing principle ...
Traffic Risk In The Australian Toll Road Sector, 2014 Bond University
Traffic Risk In The Australian Toll Road Sector, John Black
Public Infrastructure Bulletin
The article seeks to provide an answer to question about the role of the state in infrastructure planning and delivery and why have Australian state governments been keen to embrace the PPP model of procurement for roads, bridges and tunnels. A contemporary issue is the accuracy of the traffic forecasts on toll roads procured by governments with the PPP model. The “traffic forecasters” in Australia are identified and the broad order of magnitude are the accuracies of their forecasts on projected traffic for toll facilities compared with the actual opening traffic are analysed. Performance is poor (on average, traffic is ...
Risk A Lot Or Risk Averse? Studies From The Southbank Ppp, 2014 Bond University
Risk A Lot Or Risk Averse? Studies From The Southbank Ppp, Norman Jagger
Public Infrastructure Bulletin
In the late 1990s the Queensland Government announced its first Public Private Partnership (PPP) contract. No Queensland public sector agency had PPP experience and the search for a suitable project that would test the new Queensland PPP policy evoked disparate expectations within government and within the private sector. The subsequent debate was long, arduous and highly charged on issues of ideology, government business and risk.
The Government accepted the business case for the redevelopment of the Southbank Education and Training Precinct (SETP) and nominated Southbank Institute of TAFE (SBIT) as the public sector agency to lead the procurement of the ...
The Study Of Safety Governance For Service Robots: On Open-Texture Risk, 2014 Peking University Law School
The Study Of Safety Governance For Service Robots: On Open-Texture Risk, Yueh-Hsuan Weng
The emergence of steam and microelectrical machines in society gradually expanded since the era of the Industrial Revolution. Up until now, human beings have already co-existed with these machines for more than two centuries, and contemporary laws have developed preventional regulatory frameworks. These frameworks are based on risk assessments to supervise the safety of microelectrical machines which include automobiles, railway systems, elevators and industrial robots, etc. Regulators, especially South Korea and Japan expect human-robot co-existence societies to emerge within the next decade. These next generation robots will be capable of adapting to complex, unstructured environments and interact with humans to ...