Dissertations / Theses on the topic 'Air Management System'
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1
Morgan, Dave B. "Portfolio management in the Air Force : current status and opportunities." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/67564.
Full textAbstract:
Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2011.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 65-68).
There are hundreds of weapons programs, under the management of the United States Air Force worth billions of dollars. These programs are being developed to fulfill a need in the U.S. defense strategy. Bringing these weapon systems to operational status is not an easy process. It takes communication and coordination of many stakeholders and development of state-of the-art technology. More often than not, weapons programs are developed with the final cost and schedule being much higher that forecasted. Inherently weapons systems are expensive, however the costs of these systems continue to rise with no apparent end in sight. The Government Accountability Office, RAND, Congressional studies and the Defense Acquisition Performance Assessment have has criticized the Department of Defense for escalating costs. These studies point to poor requirement definition, errors in cost and scheduling forecasts, poor oversight, bad decisions by the government, and failure to adopt recommendations from reform policies as the main causes. One way ameliorate cost escalation is to employ portfolio management technique. The Air Force groups their weapon systems into 20 portfolios. Some form of portfolio management has been employed for the last decade. Portfolio management cannot solve the issues above but it can offer a solution that can potentially save millions and perhaps billions of dollars This thesis examines the Air Force's current use of Portfolio Management theory and what opportunities we can do to improve it in the acquisition community. The thesis poses three research questions: 1) How can the Air Force better employ portfolio management to curb cost overruns and schedule delays in their weapon acquisition programs? 2) What can the Air Force do to empower portfolio managers for success? 3) What barriers can the Air Force eliminate or streamline to help portfolio managers execute their portfolios more effectively and efficiently. Acquisition professionals were interviewed to glean their perspectives and opinions. More specifically acquisition personnel were asked how portfolio management was being executed and how can the Air Force improve this technique to better execute weapon systems programs. From these interviews and the research conducted, the following recommendations were made: 1) Program Executive Officers should be given more authority with respect to utilizing funds and hiring of specialized personnel 2) The Air Force needs to streamline the process for reallocating funds and, 3) The Air Force needs to modify number of reporting requirements and policy changes to make the process more efficient and effective.
by Dave B. Morgan.
S.M.in Engineering and Management
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Wan, Man Pun. "Comparison of underfloor ventilation systems and ceiling based ventilation system in thermal comfort and indoor air quality aspects /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?MECH%202002%20WAN.
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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2002.Includes bibliographical references (leaves 61-63). Also available in electronic version. Access restricted to campus users.
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Chung, Nicholas S. M. Massachusetts Institute of Technology. "Systems-theoretic process analysis of the Air Force Test Center Safety Management System." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/105294.
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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, 2014.Cataloged from PDF version of thesis.
Includes bibliographical references (page 211).
The Air Force Test Center (AFTC) faces new challenges as it continues into the 21st century as the world's leader in developmental flight test. New technologies are becoming ever more sophisticated and less transparent, driving an increase in complexity for tests designed to evaluate them. This shift will place more demands on the AFTC Safety Management System to effectively analyze hazards and preempt the conditions that lead to accidents. In order to determine whether the AFTC Safety Management System is prepared to handle new safety challenges, this thesis applied Dr. Nancy Leveson's Systems-Theoretic Process Analysis (STPA) technique. The safety management system was analyzed and potential safety constraint violations due to systemic factors, unsafe component interactions, as well as component failures were investigated. The analysis identified the key features that make the system effective; gaps in the sub-processes, roles, responsibilities, and tools; and opportunities to improve the system. These findings will provide insights on how the AFTC Safety Management System can be improved with the aim of preventing accidents from occurring during flight test operations. Finally, this thesis demonstrated the effectiveness of the STPA technique at hazard analysis on an organizational process.
by Nicholas Chung.
S.M. in Engineering and Management
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Asokan, Aravind E. M. Massachusetts Institute of Technology. "System architecture for single-pilot aircraft in commercial air transport operations." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106240.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, School of Engineering, System Design and Management Program, Engineering and Management Program, 2016.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 161-165).
Commercial flight operations have seen the consistent reduction of flight crew from five to two over the past several decades. As technology improves and airplanes become increasingly capable of flying themselves, this trend of crew reduction can be expected to continue. Single pilot operations in commercial air transport presents a range of benefits and challenges, some of which are explored in this thesis. While there has been some discussion of the concept of having a single pilot operate a complex aircraft, including an announcement by a regional jet manufacturer of their intent to realize the concept in the first half of the next decade, it is seen that there is a need to define architectures and compare them in different operational contexts. This examination of architectures is conducted by identifying high level concepts or architectural decisions mentioned in the literature reviewed thus far, and creating an architectural space containing the possible constrained combinations of architectural divisions. The architectural space is represented as a safety versus cost trade space, wherein different architectural combinations are compared against present day operations. An attempt is also made to identify possible off nominal situations and the ability of the different architectures to deal with them. Safety is studied primarily as a function of pilot workload, which is identified by studying the movement of flight operations processes from the first officer, who is eliminated. Cost in this context is regarded as a combination of acquisition costs and operating costs. The former is quantified by identifying likely changes in system complexity, while the latter is a combination of crew and new infrastructure costs. Moving to SPO requires taking into account the operating context. The analysis indicates that different classes of aircraft - widebodies, narrowbodies, and regional jets - have different levels of benefits and costs in moving to SPO. Capabilities of automation needs to improve drastically before the second human in the flight deck can be replaced, and this is borne out by the dominance of human centered concepts in the trade space. The analysis also indicates that regional aircraft may be prime candidates to move to SPO first, as most regional architectures generate positive savings.
by Aravind Asokan.
S.M. in Engineering and Management
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Van, Tonder Adriaan Jacobus Marthinus. "Sustaining compressed air DSM project savings using an air leakage management system / A.J.M. van Tonder." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4458.
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Unreliable and unsustainable electricity supply has been experienced in South Africa since
2007. Eskom implemented Demand Side Management (DSM) as a short-term solution to
alleviate this problem. Several compressed-air DSM projects were implemented to help reduce
the strain on the electrical network.
Compressed air is an integral part of production in deep-level mining, and is extensively utilised.
Problems are encountered with the effective management and repairing of leaks, since the
majority of mines have little to no procedures in place for leak management. Awareness of the
condition of the compressed-air system and leaks needed to be created at management level in
order to achieve the best results.
The purpose of this study is to investigate the effect of proper leak management on
compressed-air systems in the mining industry. Peak-clipping DSM projects implemented in the
mining industry were used for evaluation of results. Contribution to the sustainability of
compressed-air DSM projects savings through successful leak documentation was the prime
focus of this study. This was achieved through the development of a Compressed Air Leakage
Documentation System (CALDS).
This entailed the electronic field-data capture and record keeping of field data, using rugged
PDA devices suitable for the extreme environmental conditions encountered in deep-level
mining. Report generation on the status of detected leaks created awareness of compressedair-
system performance and leak-repair tracking at management level. Audible detection was
sufficient for this study, since the focus was on the larger more-severe leaks. Leaks were
expressed in monetary terms to indicate the severity.
It was found that successful management of leaks could contribute to an increase of as much
as 85% in project savings. The results also showed that creating awareness through
documentation of leaks, and the effect this has on the system, resulted in regular repairing of these leaks. Sustainability of projects was maintained during an evaluation period of ten
months, with projects achieving on average 125% of target savings.
The study showed that effective reporting on compressed-air leaks resulted in increased system
efficiency and sustainable DSM project savings. It was also seen that leak detection by outsourced
companies did not necessarily result in financial savings. When the mine took
responsibility for its own leak detection and repairs, significant savings were realised.Thesis (M.Ing. (Electrical and Electronic Engineering))--North-West University, Potchefstroom Campus, 2011.
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Mozdzanowska, Aleksandra L. (Aleksandra Ludmila) 1979. "System transition : dynamics of change in the US air transportation system." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43858.
Full textAbstract:
Thesis (Ph. D. in Technology, Management, and Policy)--Massachusetts Institute of Technology, Engineering Systems Division, Technology, Management, and Policy Program, 2008."June 2008."
Includes bibliographical references (p. 227-244).
The US Air Transportation System is currently facing a number of challenges including an increasing demand for travel and growing environmental requirements. In order to successfully meet future needs, the system will need to transition from its current state using a combination of technology, infrastructure, procedure, and policy changes. However, the complexities of the air transportation system make implementing changes a challenge. In particular, the multi-stakeholder nature of the system poses a significant barrier to transition. Historically, many changes in the air transportation system were driven by safety concerns and implemented following accidents which provided the momentum to overcome transition barriers. As a result of past changes, the system has become increasingly safe resulting in the emergence of new drivers for change. Security has emerged as a driver following the terrorist attacks of 9/11/2001 in the US and a number of system changes have since been implemented. Currently, capacity is one of the largest drivers of change. Addressing capacity issues requires solutions that can be accepted by stakeholders, and pass the necessary certification and approval requirements for implementation. The contribution of aviation to global greenhouse gas emissions is also becoming a significant driver for change in the system. The goal of this work is to understand how the air transportation system changes in response to safety, security, capacity, and environmental drivers for transition. In order to understand the dynamics of transition, historical cases of system change were studied. Twenty seven such cases have been analyzed to construct a feedback process model of transition and to explore specific change dynamics observed.
(cont.) These dynamics include: understanding the role of crisis events as catalyst for change; the effect that timing of solution development has on the overall time constant for change; the role that stakeholder objectives play in the transition process, and the use of approval and certification processes to stall or block change. understanding the process of change in the US Air Transportation System can inform future changes in aviation as well as in other systems with similar properties.
by Aleksandra L. Mozdzanowska.
Ph.D.
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Choi, Sung Kyu. "Computing Requisitioning Objectives for the Korean Air Force inventory management system." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26945.
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Tucker, Eric. "KNOWLEDGE MANAGEMENT DETERMINANTS OF CONTINUANCE BEHAVIOR: EVALUATING THE AIR FORCE KNOWLEDGE NOW KNOWLEDGE MANAGEMENT SYSTEM." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3343.
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Knowledge management (KM) encompasses the set of capabilities, processes, tools, and techniques for the most effective use of knowledge by an organization. The goal of KM is to improve the organization s ability to create, transfer, retain, and apply knowledge. Knowledge management is a goal that many organizations seek to achieve. Organizations apply their strategies, plans, and implementation to achieve KM. Organizations use technology to implement their KM strategy. For some, this approach has worked well; however, for others, the results have fallen short. KM shortcomings revolve around employees infrequent use of the technology. This research seeks to understand what influences a user s behavior to use a KM system and why a user becomes a routine user. This research provides a model of KM continuance behavior and post-acceptance usage behavior. Post-acceptance usage behavior is how an individual decides to use a system after its initial acceptance. The KM continuance model incorporates technology, community, individual, and organizational elements that influence a user s intentions and actual use of a KM system. The specific context of this research is a KM system known as the Air Force Knowledge Now (AFKN) system. AFKN emphasizes KM through expertise-sharing activities in Communities of Practice (CoPs). The AFKN KM system facilitates and enhances the relationships in the community. The data for this study were obtained by using an online questionnaire. The results are analyzed using Partial Least Squares structural equation modeling with a two-step data analysis approach. The first step assessed the properties of the measurement model. The second step assessed the path model. Path coefficients and t-values are generated to evaluate the 14 proposed hypotheses. The results of the investigation show that community and technology KM both positively influence a user s evaluation of the KM environment. The results produced a coefficient of determination of 60% for KM continued-use intention and 31% for KM continued-use behavior. The outcome of this research is a model that allows organizations to tailor their KM systems efforts to the organizational environment in order to maximize their resources. This investigation serves as a foundation for further research and development in areas of KM, KM systems, and post-acceptance usage.Ph.D.
Department of Industrial Engineering and Management Systems
Engineering and Computer Science
Industrial Engineering PhD
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Marticello, Daniel Nicholas Jr. "Complexity within the Air Force acquisition system gaining insight from a theory of collapse." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70825.
Full textAbstract:
Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, 2012.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 122-129).
Joseph Tainter's theory of societal collapse is applied in an examination of the U.S. Air Force's aircraft acquisition system in order to gain insight into the enterprise's lagging performance. Theories of collapse at both the societal level and the organizational level are reviewed. Tainter's interrelationship between increasing system complexity and diminishing marginal returns is highlighted as especially relevant to the performance of the Air Force aircraft acquisition enterprise. Using Tainter's theory as a framework, evidence is gathered leading to the conclusions that the Air Force aircraft acquisition enterprise is highly complex and as a result is experiencing diminishing marginal returns. Tainter's framework is then also used to explain why past attempts to reform the enterprise have fallen short of their goals. Previous reform efforts, in the form of reorganizations and senior leader initiatives, have been ineffectual beyond the short term because they fail to reduce the underlying level of complexity within the enterprise. The use of workarounds by stakeholders within the enterprise are shown to be efforts to increase marginal returns and avoid overcomplexity. The primary implication of viewing the Air Force aircraft acquisition enterprise through the lens of Tainter's theory of collapse is that in order to be effective, any effort undertaken to improve the performance of the enterprise must reduce the overall level of complexity within the system. Additional insights include the use of current workarounds as leading indicators of complexity or overly burdensome processes. Lastly, senior acquisition leaders should be prepared should a collapse of the enterprise occur. A vision of a much less complex enterprise should be advocated.
by Daniel Nicholas Marticello Jr.
S.M.in Engineering and Management
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Switzer, Earl R., and Amy D. Fleishans. "Progress in Global Air Traffic Management (GATM) Avionics System Test at the Air Force Flight Test Center." International Foundation for Telemetering, 2001. http://hdl.handle.net/10150/606465.
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International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, NevadaThis paper presents a progress report on Global Air Traffic Management (GATM) avionic system test activities at the Air Force Flight Test Center. In many parts of the world today the continuing growth of commercial air traffic is running up against limits brought on by overuse of aviation resources. Air corridors in Europe and on transoceanic air routes are operating at maximum capacity. Civil Aviation Authorities (CAAs) are working these challenges on two levels—near-term incremental improvements and long-term visionary changes. Each country has a CAA; ours being the Federal Aviation Administration (FAA). Near-term solutions focus on better utilization of resources such as air space and frequency spectrum and improved performance of air traffic control facilities. Long-term visionary changes, such as free flight, could fundamentally change the current civil aviation business process model. CAA policies and standards are driving near-term improvements and migration toward long-term objectives. This initiative is referred as Communication Navigation Surveillance/Air Traffic Management (CNS/ATM). Implementation of the U.S. military’s vision, Global Reach/Global Power, requires the ability to rapidly deploy armed forces to major regional conflicts anywhere in the world, and to sustain these forces for as long as it takes to resolve these conflicts. To achieve this goal and accomplish rapid deployments while at the same time minimizing costs, the Air Force has adopted a solution that makes extensive use of CNS/ATM. The Air Force calls its initiative Global Air Traffic Management (GATM). Air Force aircraft equipped with GATM avionics will be able to use CNS/ATM capabilities such as reduced vertical separation minimum (RVSM), 8.33 kHz data links, automatic dependent surveillance - broadcast (ADS-B), and global communication networks. These capabilities make possible improved flight safety, lower fuel costs, and quicker turn times. The Air Force Flight Test Center supports the GATM initiative by providing Air Traffic Control (ATC) Communications Test Facilities and Avionic System Test (ACTFAST) capabilities to support aircraft modification programs.
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Klarqvist, Linnea. "Utvärdering gällande implementeringen av System Aircraft Management för Täby Air Maintenance AB." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-1078.
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Today we live in a world where the demands increase in the aeronautics industry. This creates a situation where no mistakes are allowed about the regulations and for those who are supposed to follow these. Safety comes first, tracking of components, Service Bulletins which are recommendations from the manufactures and Airworthiness Directives which are demands from the authorities, these need to be updated at all time and everything that is done on a aircraft need to be documented.
This creates a situation where today maintenance shops need to have full control of all parts of the organization, which creates a need for a working data system.
The goal with this exam work is to evaluate the best way to implicate the new bought data system called "System Aircraft Management" on the basis of the needs of Täby Air Maintenance AB. The system are supposed to get started technically and also be implicated to the users of the system. This work will be focused to create a effective working plan to get SAM implicated with no interruption in the daily work. Also to create a plan to educate the users of the system is also on my responsability.
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Lubis, Mukhtar E. "Management control of aircraft maintenance in the Indonesian Air Force's logistics system." Thesis, Monterey, California. Naval Postgraduate School, 1985. http://hdl.handle.net/10945/21413.
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Mulholland, B. "A management system for seal positional control on power station air preheaters." Thesis, Queen's University Belfast, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335997.
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Galvin, James J. "Air Traffic Control Resource Management Strategies and the Small Aircraft Transportation System: A System Dynamics Perspective." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/29988.
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The National Aeronautics and Space Administration (NASA) is leading a research effort to develop a Small Aircraft Transportation System (SATS) that will expand air transportation capabilities to hundreds of underutilized airports in the United States. Most of the research effort addresses the technological development of the small aircraft as well as the systems to manage airspace usage and surface activities at airports. The Federal Aviation Administration (FAA) will also play a major role in the successful implementation of SATS, however, the administration is reluctant to embrace the unproven concept.
The purpose of the research presented in this dissertation is to determine if the FAA can pursue a resource management strategy that will support the current radar-based Air Traffic Control (ATC) system as well as a Global Positioning Satellite (GPS)-based ATC system required by the SATS. The research centered around the use of the System Dynamics modeling methodology to determine the future behavior of the principle components of the ATC system over time.
The research included a model of the ATC system consisting of people, facilities, equipment, airports, aircraft, the FAA budget, and the Airport and Airways Trust Fund. The model generated system performance behavior used to evaluate three scenarios. The first scenario depicted the base case behavior of the system if the FAA continued its current resource management practices. The second scenario depicted the behavior of the system if the FAA emphasized development of GPS-based ATC systems. The third scenario depicted a combined resource management strategy that supplemented radar systems with GPS systems.
The findings of the research were that the FAA must pursue a resource management strategy that primarily funds a radar-based ATC system and directs lesser funding toward a GPS-based supplemental ATC system. The most significant contribution of this research was the insight and understanding gained of how several resource management strategies and the presence of SATS aircraft may impact the future US Air Traffic Control system.Ph. D.
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Dare, Robert E. (Robert Ernest) 1961. "Stakeholder collaboration in Air Force acquisition : adaptive design using system representations." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29602.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology, Management, and Policy Program, 2003.Includes bibliographical references (p. 308-311).
Air Force development of new or evolutionary weapon systems is a complex endeavor due to the involvement of many stakeholders and the presence of considerable uncertainty in the acquisition environment. The ability to adapt a weapon system while it is still being designed affords a means to respond to this complexity. The fundamental motivation for this research is to discover how Air Force development programs, operating within established constraints, can improve their adaptability during the design phase to provide more value to the warfighter. The thesis of this research is that the quality and nature of collaboration between stakeholders during the design phase of weapon system development programs determines how effectively they share knowledge, which in turn drives the level of program adaptability. Eight case studies were conducted on Air Force development programs. Data were collected on collaborative practices and patterns of adaptability demonstrated during design. The research placed an emphasis on usage of "system representations" such as prototypes and beta software releases that acted as a form of boundary object to facilitate knowledge sharing across organizational boundaries. As programs used system representations to provide higher levels of knowledge sharing, they were found to be more adaptable. System representations were more effective at promoting adaptability when they represented the design with higher fidelity, providing system-level detail and covering stakeholder emphasis areas. Lastly, certain key stakeholder roles were found to contribute both flexibility and structure, facilitating a "zone of novelty" in which the stakeholders could exercise creativity and evaluate design options while still executing the program within established constraints.
(cont.) This research indicates that the pressing need for Air Force programs to be able to adapt in today's uncertain acquisition environment can be addressed to a significant degree through the usage of effective system representations in conjunction with supporting patterns of stakeholder interaction. Specific recommendations for Air Force acquisition policy makers and practitioners are provided.
by Robert E. Dare.
Ph.D.
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Henson, Eric Luis. "Evaluation of a regulatory system designed to control industrial air emissions and an analysis of an air dispersion model case study." Master's thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09192009-040218/.
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Bieler, Elizabeth A. "Analyzing the United States Air Force agile transformation using a systems thinking approach." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120896.
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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, System Design and Management Program, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 84-85).
The United States Air Force (USAF), like many large enterprises, has struggled to keep up with industry in developing state of the art systems in a timely manner. Although many argue that the landscape for the Department of Defense (DoD) has complex and unique factors this does not make the needs of the warfighter to be less urgent. To improve its current state, the USAF has been trying to transform software acquisitions from a Waterfall to Agile approach. Progress towards an Agile transformation appears to be somewhat stagnant. This thesis analyzes the status of the USAF Agile transformation; evaluates challenges for the USAF in becoming truly Agile -and proposes recommendations to the USAF, DoD and government leaders on how to make the USAF Agile transformation successful. A main finding of this investigation is that the USAF Agile transformation is experiencing the same challenges felt by many large corporations; however, they have a very unique set of stakeholders. The current approach needs modification to include these stakeholders' needs. There are actions that can be taken by personnel at very different levels to make the Agile transformation successful. Challenges such as regulations that reflect Waterfall methodologies are best address by high level leadership while others are best addressed by employees such as creating a grassroots movement. Agile could be a major contributor for helping the USAF to succeed at becoming more effective at quickly deploying needed systems. By utilizing a holistic view, the USAF will be better able to address the current challenges of Agile transformation to deliver capability to the warfighter.
by Elizabeth A. Bieler.
S.M. in Engineering and Management
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Marshall, Curtis J. "Autonomous & Resilient Countermeasures for Emergent System Disruptions with Application to Air Traffic Management." Thesis, The George Washington University, 2020. http://pqdtopen.proquest.com/#viewpdf?dispub=27664716.
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Engineered systems are susceptible to the disruption of intended functionality when unanticipated operating environments and constraints emerge during mission execution. To safeguard intended system functionality, resilient systems which integrate disruption avoidance and mitigation measures are needed. System automation methods have been successfully adopted for disruption avoidance and performance optimization based on anticipated needs and risks. However, given the development of unpredicted or emergent issues, human intervention is often relied on as an operational contingency to system failure or degraded performance. The purpose of this research was to develop and analyze a model for evaluating and selecting system responses to mitigate emergent disruptions without human intervention. The scope of this research addresses risk management within the system lifecycle with focus on system adaptation to unpredictable changes in the operational environment or functional constraints. The Disruption Resilience and Adaptation Model (DREAM) was formulated as an autonomous decision-making and performance evaluation process for mitigating unforeseen or unavoidable system disruptions. Evaluating the system as a whole, the model integrates diagnostic and prognostic heuristics for performance feedback and regulating system responses to actual or potential disruptions. The suitability of rule and utility-based automation methods as system adaptation techniques was also investigated. Via modeling and simulation, the DREAM and existing system automation methods were applied to an Air Traffic Management (ATM) problem and compared based on: (i) mission reliability; (ii) incident rate; (iii) system efficiency; (iv) standard deviation of efficiency; (v) and system stability. Simulation results demonstrate the DREAM yielded statistically significant reductions in the frequency and severity of ATM system disruptions in comparison to the existing rule-based standard and the leading utility-based method. As demonstrated in the ATM case study performed in this research, the DREAM can reduce the frequency and severity of system disruptions that are unanticipated or unpredictable. Furthermore, the DREAM can autonomously enable preventive and corrective action in response to unexpected system disruptions, increasing the likelihood of achieving intended system objectives without the need for human intervention. In practical terms, use of the DREAM could increase the operational availability of safety- and security-critical systems, such as ATM systems, for which disruptions can be catastrophic in nature. Beyond the ATM application in this research, the DREAM is targeted towards engineered systems which are susceptible to inevitable, yet unavoidable disruptions, such as natural disasters, intentional attacks, and human errors.
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Rivers, Timothy C. "Design and integration of a Flight Management System for the unmanned air vehicle FROG." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA357572.
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Thesis (Degree of Aeronautical Engineer) Naval Postgraduate School, December 1998."December 1998." Thesis advisor(s): Isaac I. Kaminer. Includes bibliographical references (p. 89). Also available online.
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Barchéus, Fredrik. "Who is responsible? : communication, coordination and collaboration in the future Air Traffic Management system /." Stockholm, : Industriell ekonomi och organisation, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4496.
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Weigang, Li. "Knowledge-based system for air traffic flow management : timetable rescheduling and centralized flow control." Instituto Tecnológico de Aeronáutica, 1994. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=1711.
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Future air traffic management (ATM) systems have been identified as a matter of great significance for the evolution of future air navigation systems (FANS). As one function of ATM, Air Traffic Flow Management (ATFM) provides a service complementary to Air Traffic Control (ATC). In this research, a Knowledge-Based System (KBS) has been designed to try to solve the ATFM problem. For timetable rescheduling, the system attempts to modify airlines tiemtable to smooth traffic peaks at airports during rush-hours. For centralized flow control, the system works on-line to forecast the place, time and magnitude of the congestion and to take some actions to prevent this congestion. As an Artificial Intelligence language, Prolog was chosen for developing the prototype of the Knowledge-Based ATFM System. The research gives a conceptual description of the application of KBS (specially in Prolog) in the ATFM domain. Using this system, a study of the Brazilian ATFM systemincluding the main airports of the country has been done.
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Beck, Derek William 1977. "An analysis of retention issues of scientists, engineers, and program managers in the US Air Force." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34821.
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Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 2005.Includes bibliographical references (p. 212).
The United States Air Force is having a difficult time retaining their technical officers, who are critical to the success of their research, development, and acquisitions of major military and defense systems. A statistical analysis is conducted on survey data collected, and the analysis seeks to explain the reasons why officers, mostly junior in rank, leave the Air Force after only a short time on active duty. This retention problem leads to fewer higher-ranking officers, since the military only hires from the bottom up. Results of the research show that about 47% of junior officers have intent to leave the Air Force after their initial commitment, which is 4 to 5 years. With nearly half of the Air Force's incoming officer leaving after their initial commitment, the problem is very serious. Job satisfaction and the closely related Air Force assignment system are shown to be the primary problems for junior officer retention. The thesis concludes with recommendations to Air Force leadership on where to focus their retention efforts. Special emphasis is given on how the Air Force may address tangible components of job satisfaction. Policy change recommendations that affect satisfaction levels with the assignment system are also given.
by Derek William Beck.
S.M.
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Stahr, Jeremiah B. "A study on improving United States Air Force space systems engineering and acquisition." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FStahr.pdf.
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Thesis (M.S. in Systems Engineering Management)--Naval Postgraduate School, September 2006.Thesis Advisor(s): Thomas V. Huynh, Christopher E. Forseth. "September 2006." Includes bibliographical references (p. 83-85). Also available in print.
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Ehliar, Lars-Johan, and Tobias Wagner. "Key performance indicators for the evaluation of an air navigation service providers' safety management system." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-125477.
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Safety is the main concern of the aviation industry. All Air Navigation Service Providers must have a Safety Management System (SMS) which states how safety is handled, promoted and prioritized. By developing Key Performance indicators (KPIs), it is possible to quantify the effectiveness of a SMS, discover potential flaws and improvement measures. This thesis identifies principles behind the SMS, the development of KPIs and suggest potential KPIs for the Swedish air navigation service provider LFVs’ SMS. A literature study was performed and organisation specific documents were analysed to develop potential KPIs within the areas timely compliance with international obligations, competency and adoption and sharing of best practices based on an EASA questionnaire. This work presents a set of 27 performance indicators and recommends 6 as potential KPIs for the three areas together. The KPIs are developed specifically for LFV but could be applicable for other organisations with similar SMS structure and processes. They should be analysed within the organisation and, potentially, have thresholds set before implementation.
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Obradovich, Jodi Heintz. "Facilitating synchronous collaboration among distributed agents in the air traffic management system : a descriptive study /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486572165277884.
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Parrilla, Javier A. "Hybrid Environmental Control System Integrated Modeling Trade Study Analysis for Commercial Aviation." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1396454368.
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Russell, Griffith B. "Local-and system-level thermal management of a single level integrated module (SLIM) using synthetic jet actuators." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/18908.
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Goosen, Pieter. "Efficient monitoring of mine compressed air savings / by P. Goosen." Thesis, North-West University, 2013. http://hdl.handle.net/10394/9660.
Full textAbstract:
In 2011 South Africa's main electricity supplier, Eskom, experienced a peak electricity demand of 89% of their total installed generation capacity. The high utilisation rate makes it difficult to perform essential maintenance on the system. Eskom implements Demand-Side Management (DSM) projects in various industries, in order to reduce the demand and to ensure sustainable electricity supply.
The mining sector consumes 14.5% of the total amount of electricity generated by Eskom. Mine compressed air systems can consume as much as 40% of a mine's total electricity requirements. This makes mine compressed air systems an ideal target for DSM. Electricity load seems to be reduced, but many DSM savings are not sustained throughout the project lifetime.
An existing project feedback method of a specific Energy Services Company (ESCo) includes the manual collection of data from the mines and manual generation of reports. These reports show energy savings of the DSM projects to help the ESCo and their clients to improve and sustain the performance of the projects. A great amount of man-hours is used which results in large time delays in the feedback-loop. In order to address this, the need for a new automatic feedback reporting system was identified.
This study mainly focusses on the development and implementation of a new method to monitor DSM savings on mine compressed air systems. It includes the reliable collection of data from mines, processing and storing of the data in a central database and generating savings reports. This is done automatically on a daily basis. In order to complete the feedback-loop, the reports are verified and emailed to clients and ESCo personnel on a daily basis.
The new reporting system is implemented at a number of mines. Four of these project implementations are used as case studies to measure and interpret the effectiveness and value of this system. It saves a significant amount of man-hours and proves to be of great value in the sustainability of DSM project savings. Both Eskom and mining companies benefit from the efficient monitoring of mine compressed air savings.Thesis (MIng (Computer and Electronic Engineering))--North-West University, Potchefstroom Campus, 2013.
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MacDonald, Bruce A. (Bruce Alexander). "A generalized model for the prediction of controller intervention rates in the en route air traffic control system." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/38335.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, 1987.MICROFICHE COPY AVAILABLE IN ARCHIVES AND DEWEY.
Bibliography: leaves 247-250.
by Bruce A. MacDonald.
Ph.D.
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Graham, James. "Intelligent power management for unmanned vehicles." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/18026.
Full textAbstract:
Unmanned Air Vehicles (UAVs) are becoming more widely used in both military and civilian applications. Some of the largest UAVs have power systems equivalent to that of a military strike jet making power management an important aspect of their design. As they have developed, the amount of power needed for loads has increased. This has placed increase strain on the on-board generators and a need for higher reliability. In normal operation these generators are sized to be able to power all on-board systems with out overheating. Under abnormal operating conditions these generators may start to overheat, causing the loss of the generator's power output. The research presented here aims to answer two main questions: 1) Is it possible to predict when an overheat fault will occur based on the expected power usage defined by mission profiles? 2) Can an overheat fault be prevented while still allowing power to be distributed to necessary loads to allow mission completion? This is achieved by a load management algorithm, which adjusts the load profile for a mission, by either displacing the load to spare generators, or resting the generator to cool it down. The result is that for non-catastrophic faults the faulty generator does not need to be fully shut down and missions can continue rather than having to be aborted. This thesis presents the development of the load management system including the algorithm, prediction method and the models used for prediction. Ultimately, the algorithms developed are tested on a generator test rig. The main contribution of this work is the design of a prognostic load management algorithm. Secondary contributions are the use of a lumped parameter thermal model within a condition monitoring application, and the creation of a system identification model to describe the thermal dynamics of a generator.
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Orton, Simon. "The development of a process to design automotive air intake devices." Thesis, Queensland University of Technology, 2007.
Find full textAbstract:
A snorkel is an air intake accessory attached to four wheel drive vehicles. The purpose of a snorkel is to aid in preventing water entering into the engine while a four wheel drive is crossing a water course. A study into the improvement of snorkel development systems was performed. Computational Fluid Dynamics (CFD) and other methods for designing snorkels for vehicles were explored. This project incorporates the development of suitable design guidelines and criteria for intake design with reference to relevant literature research.
Design and testing guidelines developed included comparative CFD studies; vehicle testing strategies and other mechanical effects that are critical factors to the successful completion of any airflow design project. This project expanded the knowledge base of the design team allowing a greater understanding the engine performance effect of adding a snorkel to a vehicle. The use of CFD as primary design tool was established as commercially impractical for developing a snorkel design system for all types of snorkels for the proposed design system.
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Hill, Kim D. "An organizational analysis of the United States Air Force Personnel Center (AFPC) airman assignment management system (AMS)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA390029.
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Ames, Robin W. "Analysis of a 2007 EPA compliant diesel particulate matter sampling system." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5245.
Full textAbstract:
Thesis (M.S.)--West Virginia University, 2007.Title from document title page. Document formatted into pages; contains xv, 133 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 91-95).
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Morgan, Séan (Séan Padraig) 1961. "The cost and cycle time implications of selected contractor and Air Force system program office management policies during the development phase of a major aircraft acquisition programs." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80615.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program; and (S.M.)--Massachusetts Institute of Technology, Sloan School of Management, 1999.Includes bibliographical references (leaves 111-113).
by Séan Morgan.
S.M.
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Hassebroek, Pamela Burns. "Institutionalized Environments and Information Security Management: Learning from Y2K." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-06192007-111256/.
Full textAbstract:
Thesis (Ph. D.)--Public Policy, Georgia Institute of Technology, 2008.Rogers, Juan D., Committee Chair ; Klein, Hans K., Committee Member ; Bolter, Jay David, Committee Member ; Nelson-Palmer, Mike, Committee Member ; Kingsley, Gordon, Committee Member.
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Hill, Justin Mitchell. "Shaping the Next Generation Air Transportation System with an Airspace Planning and Collaborative Decision Making Model." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/39319.
Full textAbstract:
This dissertation contributes to the ongoing national project concerning the \emph{Next Generation Air Transportation System} (NextGen) that endeavors, in particular, to reshape the management of air traffic in the continental United States. Our work is part of this effort and mainly concerns modeling and algorithmic enhancements to the Airspace Planning and Collaborative Decision-Making Model (APCDM).
First, we augment the APCDM to study an \emph{Airspace Flow Program} (AFP) in the context of weather-related disruptions. The proposed model selects among alternative flight plans for the affected flights while simultaneously (a) integrating slot-exchange mechanisms induced by multiple Ground Delay Programs (GDPs) to permit airlines to improve flight efficiencies through a mediated bartering of assigned slots, and (b) considering issues related to sector workloads, airspace conflicts, as well as overall equity concerns among the involved airlines in regard to accepted slot trades and flight plans. More specifically, the APCDM is enhanced to include the following:
\begin{enumerate}[a.]
\item The revised model accommodates continuing flights, where some flight cannot depart until a prerequisite flight has arrived. Such a situation arises, for example, when the same aircraft will be used for the departing flight.
\item We model a slot-exchange mechanism to accommodate flights being involved in multiple trade offers, and to permit slot trades at multiple GDP airports (whence the flight connection constraints become especially relevant). We also model flight cancelations whereby, if a flight assigned to a particular slot is canceled, the corresponding vacated slot would be made available for use in the slot-exchange process.
\item Alternative equity concepts are presented, which more accurately reflect the measures used by the airlines.
\item A reduced variant of the APCDM, referred to as \textbf{APCDM-Light}, is also developed. This model serves as a fast-running version of APCDM to be used for quick-turn analyses, where the level of modeling detail, as well as data requirements, are reduced to focus only on certain key elements of the problem.
\item As an alternative for handling large-scale instances of APCDM more effectively, we present a \emph{sequential variable fixing heuristic} (SFH). The list of flights is first partitioned into suitable subsets. For the first subset, the corresponding decision variables are constrained to be binary-valued (which is the default for these decision variables), while the other variables are allowed to vary continuously between 0 and 1. If the resulting solution to this relaxed model is integral, the algorithm terminates. Otherwise, the binary variables are fixed to their currently prescribed values and another subset of variables is designated to be binary constrained. The process repeats until an integer solution is found or the heuristic encounters infeasibility.
\item We experiment with using the APCDM model in a \emph{dynamic, rolling-horizon framework}, where we apply the model on some periodic basis (e.g., hourly), and where each sequential run of the model has certain flight plan selections that are fixed (such as flights that are already airborne), while we consider the selection among alternative flight plans for other imminent flights in a look-ahead horizon (e.g., two hours).
\end{enumerate}
These enhancements allow us to significantly expand the functionality of the original APCDM model. We test the revised model and its variants using realistic data derived from the \emph{Enhanced Traffic Management System} (ETMS) provided by the \emph{Federal Aviation Administration} (FAA). One of the new equity methods, which is based on average delay per passenger (or weighted average delay per flight), turns out to be a particularly robust way to model equity considerations in conjunction with sector workloads, conflict resolution, and slot-exchanges. With this equity method, we were able to solve large problem instances (1,000 flights) within 30 seconds on average using a 1\% optimality tolerance. The model also produced comparable solutions within about 20 seconds on average using the Sequential Fixing Heuristic (SFH). The actual solutions obtained for these largest problem instances were well within 1\% of the best known solution. Furthermore, our computations revealed that APCDM-Light can be readily optimized to a 0.01\% tolerance within about 5 seconds on average for the 1,000 flight problems. Thus, the augmented APCDM model offers a viable tool that can be used for tactical air traffic management purposes as an airspace flow program (particularly, APCDM-Light), as well as for strategic applications to study the impact of different types of trade restrictions, collaboration policies, equity concepts, and airspace sectorizations.
The modeling of slot ownership in the APCDM motivates another problem: that of generating detoured flight plans that must arrive at a particular slot time under severe convective weather conditions. This leads to a particular class of network flow problems that seeks a shortest path, if it exists, between a source node and a destination node in a connected digraph $G(N,A)$, such that we arrive at the destination at a specified time while leaving the source no earlier than a lower bounding time, and where the availability of each network link is time-dependent in the sense that it can be traversed only during specified intervals of time. We refer to this problem as the \emph{reverse time-restricted shortest path problem} (RTSP). We show that RTSP is NP-hard in general and propose a dynamic programming algorithm for finding an optimal solution in pseudo-polynomial time. Moreover, under a special regularity condition, we prove that the problem is polynomially solvable with a complexity of order $O(|N||A|)$. Computational results using real flight generation test cases as well as random simulated problems are presented to demonstrate the efficiency of the proposed solution procedures.
The current airspace configuration consists of sectors that have evolved over time based on historical traffic flow patterns. \citet{kopardekar_dyn_resect_2007} note that, given the current airspace configuration, some air traffic controller resources are likely under-utilized, and they also point out that the current configuration limits flexibility. Moreover, under the free-flight concept, which advocates a relaxation of waypoint traversals in favor of wind-optimized trajectories, the current airspace configuration will not likely be compatible with future air traffic flow patterns. Accordingly, one of the goals for the \emph{NextGen Air Transportation System} includes redesigning the airspace to increase its capacity and flexibility. With this motivation, we present several methods for defining sectors within the \emph{National Airspace System} (NAS) based on a measure of sector workload. Specifically, given a convex polygon in two-dimensions and a set of weighted grid points within the region encompassed by the polygon, we present several mixed-integer-programming-based algorithms to generate a plane (or line) bisecting the region such that the total weight distribution on either side of the plane is relatively balanced. This process generates two new polygons, which are in turn bisected until some target number of regions is reached. The motivation for these algorithms is to dynamically reconfigure airspace sectors to balance predicted air-traffic controller workload. We frame the problem in the context of airspace design, and then present and compare four algorithmic variants for solving these problems. We also discuss how to accommodate monitoring, conflict resolution, and inter-sector coordination workloads to appropriately define grid point weights and to conduct the partitioning process in this context. The proposed methodology is illustrated using a basic example to assess the overall effect of each algorithm and to provide insights into their relative computational efficiency and the quality of solutions produced. A particular competitive algorithmic variant is then used to configure a region of airspace over the U.S. using realistic flight data.
The development of the APCDM is part of an ongoing \emph{NextGen} research project, which envisages the sequential use of a variety of models pertaining to three tiers. The \emph{Tier 1} models are conceived to be more strategic in scope and attempt to identify potential problematic areas, e.g., areas of congestion resulting from a severe convective weather system over a given time-frame, and provide aggregate measures of sector workloads and delays. The affected flow constrained areas (FCAs) highlighted by the results from these \emph{Tier 1} models would then be analyzed by more detailed \emph{Tier 2} models, such as APCDM, which consider more specific alternative flight plan trajectories through the different sectors along with related sector workload, aircraft conflict, and airline equity issues. Finally, \emph{Tier 3} models are being developed to dynamically examine smaller-scaled, localized fast-response readjustments in air traffic flows within the time-frame of about an hour prior to departure (e.g., to take advantage of a break in the convective weather system). The APCDM is flexible, and perhaps unique, in that it can be used effectively in all three tiers. Moreover, as a strategic tool, analysts could use the APCDM to evaluate the suitability of potential airspace sectorization strategies, for example, as well as identify potential capacity shortfalls under any given sector configuration.Ph. D.
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Bugayko, Dmytro, Yuliya Ierkovska, Fariz Aliyev, Zenon Zamiar, Дмитро Бугайко, Юлія Єрковська, Фаріз Алієв, and Зенон Замаір. "National level of aviation transport safety strategic management systems regulation." Thesis, National Aviation University, 2022. https://er.nau.edu.ua/handle/NAU/54834.
Full textAbstract:
Transport is one of the key industries of any country. It is seen as a tool for addressing priority political and economic challenges, as well as a means of ensuring defense capability. An important part of the unified transport system is air transport, which occupies a significant place in the connection of Ukraine with
other countries and their individual regions. Its effective functioning should promote stabilization, structural transformation, development and implementation of foreign economic activity, meeting the needs of the population and social production in transportation, ensuring the protection of national interests of
Ukraine. The report is devoted to the analysis of the national level of the strategic management system of air transport safety.Транспорт є однією з ключових галузей будь-якої країни. Він розглядається як інструмент для вирішення пріоритетних політичних та економічних викликів, а також як засіб забезпечення обороноздатності. Важливою ланкою єдиної транспортної системи є повітряний транспорт, який займає значне місце в сполученнях України та інших країн, а також їх окремих регіонів. Його ефективне функціонування має сприяти стабілізації, структурним перетворенням, розвитку та здійсненню зовнішньоекономічної діяльності, задоволенню потреб населення та суспільного виробництва у транспорті, забезпеченні захисту національних інтересів України. Доповідь присвячена аналізу національного рівня системи стратегічного управління безпекою повітряного транспорту.
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Venter, Johan. "Development of a dynamic centrifugal compressor selector for large compressed air networks in the mining industry / Johan Venter." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9540.
Full textAbstract:
Various commercial software packages are available for simulating compressed air
network operations. However, none of these software packages are able to
dynamically prioritise compressor selection on large compressed air networks in the
mining industry.
In this dissertation, a dynamic compressor selector (DCS) will be developed that will
actively and continuously monitor system demand. The software will ensure that the
most suitable compressors, based on efficiency and position in the compressed air
network, are always in operation. The study will be conducted at a platinum mine.
Compressed air flow and pressure requirements will be maintained without
compromising mine safety procedures. Significant energy savings will be realised.
DCS will receive shaft pressure profiles from each of the shafts’ surface compressed
air control valves. These parameters will be used to calculate and predict the
compressed air demand. All pipe friction losses and leaks will be taken into account
to determine the end-point pressure losses at different flow rates. DCS will then
prioritise the compressors of the compressed air network based on the overall
system requirement.
This software combines the benefits of supply-side and demand-side management.
Potential energy savings with DCS were proven and compressor cycling reduced. A
DCS user-friendly interface was created to easily set up any mine’s compressed air
network.Thesis (MIng (Mechanical Engineering))--North-West University, Potchefstroom Campus, 2013
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Hermandez, Peral Ivan. "Evaluation of the ambient air quality analysis of HCL, H2S and NH3 from enhanced evaporation spray system ponds on the Highveld of South Africa." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-05262008-090359.
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Fernandes, Alicia Borgman. "Design Issues in the Development of a Distributed Adaptive Planning System for Airport Surface Management." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1339552527.
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Mierzwiak, Sara M. "The Development of the Contaminant Exceedance Rating System (CERS) for Comparing Groundwater Contaminant Data." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1345227410.
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Butt, Nathaniel J. "Development and Thermal Management of a Dynamically Efficient, Transient High Energy Pulse System Model." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1527602141695356.
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Chiu, Yi-Sheng, and 邱奕升. "Intelligent RFID Air baggage Management System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/98916100810893329184.
Full textAbstract:
碩士國立中央大學
通訊工程研究所
97
In the 21st global village, the aviation technology development gives more opportunities for international communication and traveling. However, during business trip or traveling, losing luggage or mistaken is the most frequent event that people may encounter. Moreover, after 911 attack, Aviation Security Management is the most important issue for every International Airport, including passenger identity check; also, luggage management is another vital issue for International Airport. The innovation and application of Radio Frequency Identification (RFID) helps people in all aspects, such as logistics, automatized management, safety and security check, production and manufacturing, medicine and treatment, husbandry and cultivation, locating and rescue etc. The main purpose of this study is to stimulate the luggage check-in and checking processes in the airport, trying using RFID technology to set up an Aviation Luggage Management System to lower the rate of luggage missing. Thankfully, the RFID system can make the best use of tracking every luggage and strengthen the aviation luggage security system. The scheme for this research starts from luggage check-in, tagging RFID on passport and luggage; after security check, the RFID system will identify the luggage or package and then send the luggage or package to the designated flight. Before luggage or package boarding, double check the luggage and package by using RFID to avoid loading onto the wrong flight, so this will not influence passenger’s right and save the cost of finding missing luggage. Furthermore, identifying through RFID system can also make a comparison between passenger’s passport and luggage stub, checking if the luggage can pass through the security check. This way, the system not only can prevent passenger getting wrong luggage or forgetting the luggage at the check-in site, but also can enhance the function of luggage safety and security check.
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Lam, Yun Fat. "System enhancement of Title V permit reviews and point source inventories." 2004. http://etd.utk.edu/2004/LamYunFat.pdf.
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Thesis (M.S.)--University of Tennessee, Knoxville, 2004.Title from title page screen (viewed Jan. 20, 2005). Thesis advisor: Wayne T. Davis. Document formatted into pages (viii, 106 p. : ill.(some col.)). Vita. Includes bibliographical references (p. 33-34).
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Hu, Ming-Hsiu, and 胡銘修. "Research on air force interior verification knowledge management system." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/02919243948221422573.
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Hsu, Tsang-Yi, and 許滄宜. "Application of Building Energy Management System on Ice-Storage Air Conditioning System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/8y7dny.
Full textAbstract:
碩士國立臺北科技大學
能源與冷凍空調工程系碩士班
98
Due to the impact of global warming in recent years, the average temperature around the world has been rising steadily. Consequently, the demand for air conditioning systems in all types of buildings has also grown substantially. As air conditioning systems consist of an assortment of energy consuming components, they create significant stress on peak electricity consumption in Taiwan during summers. In order to cater to air-conditioning system demands, while curbing peak electricity consumption in the summer at the same time, an ice-storage air conditioning system will no doubt be the fastest and most effective design for the task. Although the promotion of an ice-storage air conditioning system has been on-going in Taiwan for quite some time, due to the defects involved in the control of ice-storage systems, and the fact that conventional control strategies were too crude for such systems, the use of ice-storage air conditioning systems in Taiwan could only reduce electricity bills rather than cut power consumption. And as such, the author has chosen to focus on the ice-storage air conditioning system of a multi-purpose building as the target of the study and deployed various research techniques such as data statistics and linear regression analysis to examine the effectiveness of energy conservation for an ice-storage air conditioning system by introducing a building energy management system while analyzing the efficiency of chillers in future systems. The incorporation of a building energy management system into an ice-storage air conditioning system involves various power-saving strategies such as the use of external air conditions to moderate discharging strategies, implementing AC control for secondary (chilled water) pump, including air handling unit and fan in usage schedule/control according to timetables and changing cooling tower fans to temperature control via cooling water supply temperature. Prior to the introduction of BEMS, the annual power consumption of ice-storage air-conditioning system was at 1,681,888 kWh, which fell to 1,495,132 kWh after the improvements (186,757kWh saved, translating to 11.1% of energy saved on a yearly basis). In addition, the ice-storage chiller model built from the data collected through the BEMS may also be used to analyze the correlation between chiller and various parameters (i.e. cooling water temperature and chiller PLR and etc.) in order to determine the changes of chiller performance, cooling water temperature and power consumption. Not only that, temperature readings from various loops may be used to monitor efficiency decay in various heat-exchange equipment in the system.
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Shen, Chia-Chen, and 沈家正. "Design of Active Security Management Mechanism for Air Force Asset Information Management System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/91303843479945557767.
Full textAbstract:
碩士國防大學
資訊管理學系
104
Nowadays all the paper documents in the R.O.C. armed forces are preserved and controlled by law, while all the digital documents are isolated from external internet to avoid the possibility of data leak from the Internet. Also, the digital documents are limited by the Information Security Control Software to be either read out and write in. But the physical devices that have classified files stored inside can only be checked by man and there is no other supervisory control mechanism. The news reported that important equipment such as weapon development testing computers were lost from the armed forces. This incident proved that information security protection should not only relate to digital documents but also the physical devices management. This research uses the concept of Internet of Things to actively confirm the existence of each other, and then feedback the information back to Air Force Information Assets Management System. Management personnel then can use this system to complete the operation of checking and monitoring. Besides, through active management of IoT can actively feedback relative information if any information asset is moved or lost. The specific contribution of this paper is: A. ensuring the information devices is physically safe with the active management mechanism. B. using self-certification and stream encryption mechanism to strengthen the safety design during the process of information exchange to meet the safety requirement of IoT such as classification, integrity, identification, non-denial, ownership, privacy, falsification prevention and DDOS prevention.
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Chen, Meng-Cheng, and 陳孟成. "Energy Conservation Strategy of Seasonal Management of Air-Conditioning System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/02788220602260230659.
Full textAbstract:
碩士國立勤益科技大學
冷凍空調系
99
This thesis proposes demonstration the best energy saving design based on considering the air-conditioning energy saving, then the structure construction. The research probes into the number of chillers, volume control management, variable water volume control of secondary zone pumps, and variable air volume control of cooling towers by using the eQUEST program. The HVAC load in spring and autumn are 67% to 76% and in winter are 25% to 40% in general. The strategy of controlling the number of chiller can enhance the load factor to 70% to 90%. Moreover, the effect of energy saving of variable water volume and variable air volume can enhance to 63% and 40%. The results are verified by multiple-chiller controls has annual energy saving potentials. It can avoid over-design problems, and can also advance the low load factor in spring, autumn and winter.
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Liou, Jong-Shyang, and 劉仲祥. "The Develpement of The Real Time Air Traffic Management System and Management Strategy Analysis." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/95184994947315690396.
Full textAbstract:
博士國立成功大學
交通管理學系碩博士班
92
This research develops a real-time air traffic flow management (ATFM) program. The system considered in this research is multi-airport and multi-period. This program will predict the 15-minute traffic demand, traffic flow, and capacity for certain time frame in advance and determine departure quota of each airport based on the predicted flow and capacity. The ATFM program consists of four modules: Information Receive Module, Flow Prediction, Capacity Prediction, and Flow Optimization Model. It’s very unlikely to evaluate the performance of this ATFM program in real system. This research incorporates a microscopic simulation model to represent the airspace operation system and tests the air traffic flow management program under various scenarios. The performae of various surveillance systems, including Flight Data Processing (FDP), Radar Data Processing(RDP), and Communication Nevigation Surveillance (CNS), is tested and compared. The methodology of artificial neural network, ANN, is employed to better predict the flight departure and arrival times. The prediction of the flight departure and arrival times is used to predict traffic flow. The capacities of airports are estimated baed on weather information. A minimum cost flow problem is formulated to determine the optimal departure quota for each airport. Also, the successive shortest path algorithm is developed to solve this flow optimization problem. This ATFM program is tested for the aviation network in Taiwan. The result shows that the ATFM program with buffer concept can significantly reduce the airborne holding time, but only slightly increase the arrival delay. The performance comparison of varous surveillance systems shows that more accuate information the survailance system provides, the better performance the ATFM will have. In addition, the total computation time for an interation takes less than 3 minutes in a personal computer, which is quite promising for real time application.
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Chou, Hsing, and 周荇. "Flight Safety and Air Force Logistices Information Management System Relationship Research." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/99597494210620235444.
Full textAbstract:
碩士國防管理學院
後勤管理研究所
94
Because aircraft was operated within gravity affection, finally it will be crashed if malfunction and could not hold the altitude. That make pilot, equipment and the third party got hugely damaged. That’s why the whole world positively research to decrease the incidence of mishap, accident, incident. The statistics show the human error was primary cause of mishap, so they use the history of maintenance to find out the cause of event. That’s reactively aviation safety preventive program. This study take the maintenance information and failure type form LIMS. Many statistic techniques, which included descriptive statistic analysis, factor analysis, reliability analysis, T-test, correlation analysis, as well as multi-regression analysis, were employed in this study. After that to find out the relationship between LIMS and flight malfunction, and make proactively aviation safety preventive program to decrease the incidence of event and improve flight safety.