Tesi sul tema "Aircraft's safety"
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Blum, Scott C. "Aircraft automation policy implications for aviation safety". Thesis, University of Colorado at Colorado Springs, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10259459.
Since the first aircraft accident was attributed to the improper use of automation technology in 1996, the aviation community has recognized that the benefits of flight deck technology also have negative unintended consequences from both the technology itself and the human interaction required to implement and operate it. This mixed methods study looks at the relationship of technology to the severity of aircraft mishaps and the policy implications resulting from those relationships in order to improve safety of passenger carrying aircraft in the United States National Airspace System. U.S. mishap data from the National Transportation Safety Board and the Aviation Safety Reporting System was collected covering aircraft mishaps spanning the last twenty years. An ordinal regression was used to determine which types of flight deck technology played a significant role in the severity of aircraft mishaps ranging from minor to catastrophic. Using this information as a focal point, a qualitative analysis was undertaken to analyze the mechanisms for that impact, the effect of existing policy guidance relating to the use of technology, and the common behaviors not addressed by policy that provide a venue to address aviation safety. Some areas of current policy were found to be effective, while multiple areas of opportunity for intervention were uncovered at the various levels of aircraft control including the organizational, the supervisory, the preparatory, and the execution level that suggest policy adjustments that may be made to reduce incidence of control failure caused by cockpit automation.
Vauchel, Nicolas. "Estimation des indices de Sobol à l'aide d'un métamodèle multi-éléments : application à la dynamique du vol". Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILN008.
The thesis is addressing a concrete issue on aircrafts safety. The post-stall flight domain is a complex flight domain where flows around an airfoil may be highly unstable and massively stalled. In this domain, which can be reached on purpose or accidentally, usual controls are less efficient or completely inefficient, which can endanger the pilot and its passengers. The thesis is about the determination of the flight predictions in the post-stall flight domain, their dependences to the selected model structure and about the uncertainties of the experimental data the model relies on. The dynamic of the motion of the aircraft is governed by a dynamic system of ordinary non-linear differential equations. In these equations, the effects from the fluid on the aircraft are traduced by the global aerodynamic coefficients, the dimensionless forces and moments applied by the fluid on the aircraft. These coefficients depend on a high number of variables in a non-linear fashion. Among these variables are the geometry of the aircraft, its velocity and its rotation rates compared to earth, and characteristics of the surrounding flow. A representation model having a selected structure is determined for every aerodynamic coefficient, in order to represent these complex dependences. This model rely on experimental data obtained on a scale model, free flight data on a real aircraft being too expensive and too risky to get in the post-stall domain. Another way of obtaining data would be to use computational simulations. Nevertheless, the complex and unsteady flows around the 3D geometry of the aircraft makes the simulation too expensive with the current ressources, even if some recent studies begin to explore this direction of research. The selected models in the thesis are built on experimental data only. In the dynamic system, the global aerodynamic coefficients are evaluated by interpolation in these databases according to the selected model structure. The fact of selecting a simplified structure of the model makes it deficient. Moreover, as these models rely on experimental data, they are uncertain. The gaps and the uncertainties of the model have some impacts on the flight predictions. The initial objective of the thesis is therefore to study these impacts.During the thesis, new scientific objectives appeared, objectives going beyond the scope of Flight Dynamics. First, a new multi-element surrogate model for Uncertainty Quantification based on modern Machine learning methods is developed. Multi-element surrogate models were developed to address the loss of accuracy of Polynomial Chaos model in presence of discontinuities. Then, a formula linking the sensitivity Sobol indices to the coefficient of a multi-element surrogate model is derived. These results are used in the case of Flight Dynamics in order to address the issue raised in the initial objective of the thesis. The numerous bifurcations of the dynamic system can be traduced by discontinuities and/or irregularities in the evolution of the state variables compared to the uncertain parameters. The methods of Sensitivity Analysis and of Uncertainty Quantification developed in the thesis are therefore good candidates to analyse the system
Earl, Laurie. "Enhancing Aircraft Safety through Observations and Pilot Verbalisations". Thesis, Griffith University, 2018. http://hdl.handle.net/10072/371945.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School Educ & Professional Studies
Arts, Education and Law
Full Text
Acar, Erdem. "Aircraft structural safety effects of explicit and implicit safety measures and uncertainty reduction mechanisms /". [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0015222.
Yeun, Richard Chee Kin. "The Impact of Safety Management Systems on Safety Performance: Commercial Aviation Operations". Thesis, Griffith University, 2015. http://hdl.handle.net/10072/367145.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Natural Sciences
Science, Environment, Engineering and Technology
Full Text
Braithwaite, Graham R. "Australian aviation safety : a systemic investigation and case study approach". Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/6881.
Macey, P. "Probabilistic risk assessment modelling for passenger aircraft fire safety". Thesis, Cranfield University, 1997. http://hdl.handle.net/1826/4260.
Knife, S. "Propulsion system safety analysis methodology for commercial transport aircraft". Thesis, Cranfield University, 1997. http://hdl.handle.net/1826/4256.
Prescott, Darren Richard. "Safety modelling for the time limited dispatch of aircraft". Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/12235.
Gibbons, Blake. "Safety Management Systems (SMS) for aircraft manufacturers and maintainers?" Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9213.
Chu, Liu. "Reliability and optimization, application to safety of aircraft structures". Thesis, Rouen, INSA, 2016. http://www.theses.fr/2016ISAM0008/document.
Tremendous struggles of researchers in the field of aerodynamic design and aircraft production were made to improve wing airfoil by optimization techniques. The development of computational fluid dynamic (CFD) in computer simulation cuts the expense of aerodynamic experiment while provides convincing results to simulate complicated situation of aircraft. In our work, we chose a special and important part of aircraft, namely, the structure of wing.Reliability based optimization is one of the most appropriate methods for structural design under uncertainties. It struggles to seek for the best compromise between cost and safety while considering system uncertainties by incorporating reliability measures within the optimization. Despite the advantages of reliability based optimization, its application to practical engineering problem is still quite challenging. In our work, uncertainty analysis in numerical simulation is introduced and expressed by probability theory. Monte Carlo simulation as an effective method to propagate the uncertainties in the finite element model of structure is applied to simulate the complicate situations that may occur. To improve efficiency of Monte Carlo simulation in sampling process, Latin Hypercube sampling is performed. However, the huge database of sampling is difficult to provide explicit evaluation of reliability. Polynomial chaos expansion is presented and discussed. Kriging model as a surrogate model play an important role in the reliability analysis.Traditional methods of optimization have disadvantages in unacceptable time-complexity or natural drawbacks of premature convergence because of finding the nearest local optima of low quality. Simulated Annealing is a local search-based heuristic, Genetic Algorithm draws inspiration from the principles and mechanisms of natural selection, that makes us capable of escaping from being trapped into a local optimum. In reliability based design optimization, these two methods were performed as the procedure of optimization. The loop of reliability analysis is running in surrogate model
Rodrigues, Beatriz de Melo. "Aircraft safety assessment process enhanced by human factors aspects". Instituto Tecnológico de Aeronáutica, 2007. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=1041.
Melnyk, Richard V. "A framework for analyzing unmanned aircraft system integration into the national airspace system using a target level of safety approach". Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47572.
Ruenruoy, Ratchada. "Passengers' perception of the safety demonstration on board an aircraft". Thesis, Middle Tennessee State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1588262.
The cabin safety demonstration on board an aircraft is one of the methods to provide safety information for passengers before aircraft takeoff. However, passengers' enthusiasm toward safety demonstrations is normally low. Therefore, the study of passengers' perception toward safety briefings on board an aircraft is important in increasing the safety awareness for the travelling public on commercial aircraft. A survey was distributed to measure the perceptions of Middle Tennessee State University (MTSU) faculty and staff, Aerospace students, and international students who have traveled in the last year. It was generally found that watching the cabin safety demonstration before aircraft takeoff was believed to be important for passengers. However, the attention to the safety demonstration remained low because the safety briefings were not good enough in terms of clear communication, particularly in the recorded audio demonstration and the live safety demonstration methods of briefing.
Simmons, Martin Christopher. "Safety through novel dynamic pressure testing of aircraft structural panels". Thesis, University of Liverpool, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417174.
Bacon, Duane Lee. "An Agile Framework to Develop Safety Critical Software for Aircraft". Thesis, State University of New York at Binghamton, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10981623.
Industries have been discovering significant improvements in quality, productivity, and cost by implementing Agile principles during the software development life cycle. However, the Aerospace industry has been slow to adopt Agile to develop safety critical software, primarily because DO-178C has been interpreted as prescribing Waterfall development(VanderLeest & Buter, 2009). This work introduces the advantages of Agile and posits that Agile can meet DO-178C considerations. A literature review conducted, herein, makes the case that Agile is a significantly better approach than Waterfall for software development. Further, the review outlines some of the challenges of Agile in large software development programs but indicates how these challenges can be addressed. This work provides an Agile framework and demonstrates how the framework meets the objectives of DO-178C for safety critical software development. The framework provides alternate approaches to some DO-178C development activities, such as Stages of Involvement. This analysis clearly demonstrates that DO-178C does not require a Waterfall approach and that safety critical software can and should be developed using more modern development approaches such as Agile.
Raimondo, Marialuigia. "Improving the aircraft safety by advanced structures and protecting nanofillers". Doctoral thesis, Universita degli studi di Salerno, 2014. http://hdl.handle.net/10556/1480.
Inspection and Maintenance are important aspects when considering the availability of aircraft for revenue flights. Modern airframe design is exploiting new exciting developments in materials and structures to construct ever more efficient air vehicle able to enable efficient maintenance. The improvement in the aircraft safety by advanced structures and protecting nanofillers is a revolutionary approach that should lead to the creation of novel generation of multifunctional aircraft materials with strongly desired properties and design flexibilities. In recent years, the development of new nanostructured materials has enabled an evolving shift from single purpose materials to multifunctional systems that can provide greater value than the base materials alone; these materials possess attributes beyond the basic strength and stiffness that typically drive the science and engineering of the material for structural systems. Structural materials can be designed to have integrated electrical, electromagnetic, flame resistance, and possibly other functionalities that work in synergy to provide advantages that reach beyond that of the sum of the individual capabilities. Materials of this kind have tremendous potential to impact future structural performance by reducing size, weight, cost, power consumption and complexity while improving efficiency, safety and versatility. It is a well-known fact that, actually, also a very advanced design of an aircraft has to take required inspection intervals into account. An aircraft with inherent protective abilities could help to significantly extend the inspection intervals, thereby increasing aircraft availability. The challenge in this research is to develop and apply a multifunctional composite for structural applications. The aim of this project is the formulation, preparation and characterization of structural thermosetting composites containing dispersed protective nanofillers. This project specifically targets composites tailored for multifunctional applications such as lightning strike protection, and flame resistance. These composites were designed to enable their application on next generation aircrafts. With regard to the objectives of this PhD project the multifunctional composite systems were developed with the aim of overcoming the following drawbacks of the composite materials: • reduced electrical conductivity; • poor flame resistance. The thermosetting material was projected considering compatibility criteria so that to integrate different functions into a material that is capable of bearing mechanical loads and serves as a structural material element. [edited by author]
XII n.s.
Іванівна, Харламова Тетяна. "THE AIRCRAFT MAINTENANCE ENGINEER COMPETENCE WITHIN THE CONTEXT OF AVIATION SAFETY REGULATIONS". Thesis, Національний авіаційний університет, 2014. http://er.nau.edu.ua/handle/NAU/11841.
Nam, G. W. "Development of safety and reliability prediction methodology for aircraft systems with common-cause failures". Thesis, Cranfield University, 1996. http://dspace.lib.cranfield.ac.uk/handle/1826/11287.
Rubenking, Brian Harold. "Market forces and aircraft safety: a daily stock market return analysis". Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45178.
Master of Arts
Bond, Steven James. "Aircraft system safety : a new approach to assessing in-service performance". Thesis, City University London, 2006. http://openaccess.city.ac.uk/8471/.
Zorro, Sara Marques. "Pilots performance and flight safety: flight physiology in unpressurized aircraft cabins". Master's thesis, Universidade da Beira Interior, 2012. http://hdl.handle.net/10400.6/2002.
Os pilotos de aviação ligeira estão expostos a diferentes situações ambientais devido às cabines não pressurizadas e não climatizadas. Algumas dessas variações podem levar o corpo humano aos seus limites, que associados a fatores psicológicos podem culminar em incidentes ou até mesmo fatalidades. Na verdade, uma revisão da literatura sobre o tema sugere que uma parte significativa dos incidentes e acidentes neste tipo de aviação, estão relacionados com o fator humano. Esta análise pode revelar um fenómeno oculto, mas significativo e preocupante em termos de segurança de voo: as mudanças de desempenho dos pilotos aquando da alteração de parâmetros psicológicos e fisiológicos, referentes a diferentes níveis de stress e variações de pressão durante as diferentes fases do voo, respetivamente. Esta pode ser uma situação preocupante devido à disparidade da reação do corpo humano entre pilotos diferentes, para as mesmas condições de voo. A natureza, quer em termos de fatores ambientais, como a pressão e a temperatura, quer a nível de comportamento fisiológico e psicológico humano, durante as diferentes fases de voo, é imprevisível. Portanto, torna-se muito difícil estabelecer limites de segurança. O objetivo geral deste trabalho consiste em analisar a influência das condições ambientais de voo e dos parâmetros psicofisiológicos do piloto sobre o desempenho de tarefas, durante situações de voo diferentes, considerando alguns dos seus hábitos quotidianos. Para este fim, foi feita uma análise estatística a um inquérito sobre questões específicas referentes à necessidade de sistemas de monitorização da atenção do piloto, e, em paralelo, foi construído um sistema portátil e ergonómico de monitorização. Este permite registar a oximetria cerebral, para estudar o fenómeno da hipoxia e a sua importância, ECG e EEG, a fim de se estabelecer uma correlação entre a influência da carga de trabalho mental e outros parâmetros fisiológicos, durante as diferentes fases de voo. O objetivo específico deste estudo é definir os limites fisiológicos de cada piloto, por meio de testes de simulação de voo, contemplando cenários diferentes, a fim de criar um sistema de alerta a bordo para evitar possíveis incidentes ou acidentes. Com esta investigação pretende-se também sugerir que uma eventual restrição na legislação referente ao licenciamento de pilotos de aviação ligeira, dentro das definições dos limites fisiológicos, seria uma contribuição positiva para um ambiente de voo mais seguro.
Ho, Li-Chi. "A critical analysis of airline safety management with reference to pilots and aviation authority officers". Thesis, Cranfield University, 1996. http://hdl.handle.net/1826/3755.
Wang, Xiaoyang. "Aircraft fuel system prognostics and health management". Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7214.
Khatwa, Ratan. "The development of a take-off performance monitor (TOPM)". Thesis, University of Bristol, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360585.
Fennell, Pamela Joanne. "Factors influencing performance of aircraft safety procedures and perceptions of accident survivability". Thesis, Cranfield University, 1992. http://dspace.lib.cranfield.ac.uk/handle/1826/11037.
Mishra, Chinmaya. "Improving efficiency and accuracy of safety related algorithms for unmanned aircraft systems". Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3006089/.
Fennel, P. J. "Factors influencing performance of aircraft safety procedures and perceptions of accident survivability". Thesis, Cranfield University, 1992. http://dspace.lib.cranfield.ac.uk/handle/1826/11037.
Leão, Marcelo Soares. "A human factors perspective towards functional hazard assessment in aircraft systems safety". Instituto Tecnológico de Aeronáutica, 2012. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2222.
Ivanovitch, Marianna. "Design of virtual aircraft multipurpose platform". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5295/.
Merz, Ludger. "New Dynamic Approach of a Safety Barrier Wall for a Civil Transport Aircraft". Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-62742.
Brown, Mark Anthony. "An investigation of three-dimensional displays for real-time, safety-critical command/control applications : with application to air traffic control". Thesis, Queen Mary, University of London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336445.
GOMES, Adriano José Oliveira. "Systematic model-based safety assessment via probabilistic model checking". Universidade Federal de Pernambuco, 2010. https://repositorio.ufpe.br/handle/123456789/2651.
Faculdade de Amparo à Ciência e Tecnologia do Estado de Pernambuco
A análise da segurança (Safety Assessment) é um processo bem conhecido que serve para garantir que as restrições de segurança de um sistema crítico sejam cumpridas. Dentro dele, a análise de segurança quantitativa lida com essas restrições em um contexto numérico (probabilístico). Os métodos de análise de segurança, como a tradicional Fault Tree Analysis (FTA), são utilizados no processo de avaliação da segurança quantitativo, seguindo as diretrizes de certificação (por exemplo, a ARP4761 Guia de Práticas Recomendadas da Aviação). No entanto, este método é geralmente custoso e requer muito tempo e esforço para validar um sistema como um todo, uma vez que para uma aeronave chegam a ser construídas, em média, 10.000 árvores de falha e também porque dependem fortemente das habilidades humanas para lidar com suas limitações temporais que restringem o âmbito e o nível de detalhe que a análise e os resultados podem alcançar. Por outro lado, as autoridades certificadoras também permitem a utilização da análise de Markov, que, embora seus modelos sejam mais poderosos que as árvores de falha, a indústria raramente adota esta análise porque seus modelos são mais complexos e difíceis de lidar. Diante disto, FTA tem sido amplamente utilizada neste processo, principalmente porque é conceitualmente mais simples e fácil de entender. À medida que a complexidade e o time-to-market dos sistemas aumentam, o interesse em abordar as questões de segurança durante as fases iniciais do projeto, ao invés de nas fases intermediárias/finais, tornou comum a adoção de projetos, ferramentas e técnicas baseados em modelos. Simulink é o exemplo padrão atualmente utilizado na indústria aeronáutica. Entretanto, mesmo neste cenário, as soluções atuais seguem o que os engenheiros já utilizavam anteriormente. Por outro lado, métodos formais que são linguagens, ferramentas e métodos baseados em lógica e matemática discreta e não seguem as abordagens da engenharia tradicional, podem proporcionar soluções inovadoras de baixo custo para engenheiros. Esta dissertação define uma estratégia para a avaliação quantitativa de segurança baseada na análise de Markov. Porém, em vez de lidar com modelos de Markov diretamente, usamos a linguagem formal Prism (uma especificação em Prism é semanticamente interpretada como um modelo de Markov). Além disto, esta especificação em Prism é extraída de forma sistemática a partir de um modelo de alto nível (diagramas Simulink anotados com lógicas de falha do sistema), através da aplicação de regras de tradução. A verificação sob o aspecto quantitativo dos requisitos de segurança do sistema é realizada utilizando o verificador de modelos de Prism, no qual os requisitos de segurança tornam-se fórmulas probabilísticas em lógica temporal. O objetivo imediato do nosso trabalho é evitar o esforço de se criar várias árvores de falhas até ser constatado que um requisito de segurança foi violado. Prism não constrói árvores de falha para chegar neste resultado. Ele simplesmente verifica de uma só vez se um requisito de segurança é satisfeito ou não no modelo inteiro. Finalmente, nossa estratégia é ilustrada com um sistema simples (um projeto-piloto), mas representativo, projetado pela Embraer
Dell, Geoff. "Aircraft pushback accidents worldwide 1964-1992 : causes and prevention". Thesis, The Author [Mt. Helen. Vic.] :, 1993. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/39809.
Thesis (Master of Applied Science)
Edmonds, Kendy Elizabeth. "Demonstrating an Equivalent Level of Safety for sUAS in Shielded Environments". Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103964.
Master of Science
With the development of small unmanned aircraft system (sUAS) technologies have come many practical and regulatory challenges, especially in low altitude airspaces. At lower altitudes, manned aircraft are likely to be operating at lower velocities and restricting standards require UASs to maneuver against aircraft that may not present a significant risk of collision. The excessive avoidance maneuvering can cause the successful execution of even simple operations such as package delivery or survey operations to become difficult. The strict requirements have the potential to specifically inhibit sUAS beyond visual line-of-sight commercial operations, which are of great interest to the industry. This thesis describes a method for demonstrating an equivalent level of safety of small UAS operations when utilizing avoidance algorithms that leverage obstacle and terrain awareness. The purpose of this research is to demonstrate that by remaining close to obstacles, which pose a hazard to other aircraft, an unmanned aircraft can lower the risk of a mid-air collision and to demonstrate an equivalent level of safety for operations using a reduced safety metrics.
Blake, Simon. "The development and use of aircraft evacuation modelling as a viable tool for the certification and safety analysis of passenger aircraft". Thesis, University of Greenwich, 2003. http://gala.gre.ac.uk/6115/.
Horrell, Alexander C. (Alexander Chapman). "Extending safety assessment methods for remotely piloted aircraft operations in the national airspace system". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/76103.
"June 2012." Cataloged from PDF version of thesis.
Includes bibliographical references (p. 115-118).
Remotely Piloted Aircraft operations are growing rapidly in the United States specifically for the Department of Defense to achieve training needs. To ensure the safety of the National Airspace System is maintained to a high standard, Remotely Piloted Aircraft operations are being assessed on a case by case basis by the Federal Aviation Administration for approval of a Certificate of Authorization. FAA guidance currently requires the use of human observers to ensure safe separation of RPA operations from other aircraft. The United States Air Force intends to use technology to replace the human observers, but a safety assessment must be conducted for approval of any such technology. The objective of this thesis is to examine the process and results of traditional safety assessment methods used by the United States Air Force as well as apply the same information as a case study to an innovative method called the influence matrix framework. The influence matrix framework will be analyzed by applying a clustering technique to gain insight about the benefits and challenges of the assessment method for future systems. RPA operations at Cannon Air Force Base, NM propose the use of ground-based radars to monitor the airspace around the RPA. The Air Force Safety Center worked together with MIT Lincoln Laboratory for the safety assessment process of the groundbased radars. The knowledge gained in that process is documented in this thesis. Next, that system architecture is further applied to the influence matrix framework for analysis. The influence matrix represents the expected influence of element behavior changes on hazard risk. The framework is manipulated with a clustering technique to analyze results when changing the scope of the safety assessment method. In this work, the application of the influence matrix provided insights into the functionality of the ground-based radar system and usefulness of the IM method. The clustering technique provided a foundation for a formal process to handle scoping challenges for future complex system safety assessments. For the future, this research will have to be expanded further to better formalize the modeling and assessment of the influence matrix.
by Alexander C. Horrell.
S.M.
Pereira, Renato Augusto da Cunha. "Closed loop safety improvement system applied to human factors in aircraft maintenance and inspection". Instituto Tecnológico de Aeronáutica, 2004. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=650.
FUSARO, ROBERTA. "Comparative analysis of new configurations of aircraft aimed at competitiveness, environmental compatibility and safety". Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2694988.
Jakoet, Fatima. "A safety culture survey amongst aircraft maintenance engineers at a leading airline in South Africa". Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/959.
ENGLISH ABSTRACT: Safety culture is of paramount importance in high risk industries such as railway maintenance, nuclear, offshore industries and aviation industry, resulting in the assessment of safety culture in these industries. The purpose of this study is to assess the safety culture amongst maintenance engineers at a leading airline in South Africa. The approach to the study was twofold. Firstly, an intensive literature study was conducted, followed by an empirical study. The literature study clarified and zoned in on the importance safety management system and the pivotal role of human factors in aviation maintenance and its contribution to safety culture. The Airways Technical Safety Culture Survey (ATSCS) was distributed to all the maintenance engineers employed at a major South African airline. The subsequent data, received from 113 respondents, was interpreted and then analysed using the SPSS statistical software package. Firstly, the responses to the seven scales of the ATSCS were examined to determine whether the data was suitable for factor analysis. The data was analysed using the SPSS statistical package. A principal axis factor analysis, with a Varimax rotation was performed on the data in order to determine which factors cluster together. Scale reliability was determined by making use of Chronbach’s coefficient alpha. The average mean of the corrected correlations between each scale item was also calculated to examine the internal homogeneity and unidimensionality of the different scales. Next, the items were subjected to item analysis. The mean, standard deviation, skewness and kurtosis were calculated for the sample scores of the ATSCS. The influence and effect of the biographical variables on the maintenance engineers’ attitudes towards safety were determined by comparing the responses of various employee subsets with one another by means of t-tests and ANOVA. The results of the t-tests revealed that ethnicity had a statistically significant effect on the safety attitude with regard to management’s attitude towards safety and safety training. The effect sizes were calculated to determine the strength of the relationship, and this was found to be of medium effect. The ANOVA results indicated that education, geographical location and fleet qualification have no effect on the safety attitude of the population. However, an ANOVA of work area revealed that the major maintenance work area differs significantly from the other two groups in five areas of the Safety Culture Survey. Finally, the overall responses of the majority of participants in this study were very positive with regard to the seven core factors related to attitudes toward safety. It is suggested that future studies of this nature should incorporate a larger sample consisting of cross-cultural carriers in the global industry. This will confirm the external validity of the present study and support the transfer of findings to other maintenance engineers.
AFRIKAANSE OPSOMMING: Talle studies is onderneem om die veiligheidskultuur in hoë-risiko industrieë soos die spoorweginstandhoudingsbedryf, kernbedryf en olieboorbedryf te definieer en te assesseer terwyl daar slegs ’n paar gedokumenteerde pogings in die lugvaartbedryf bestaan. Die doel van hierdie studie is om die veiligheidskultuur by instandhoudingsingenieurs in een van die vernaamste lugrederye in Suid-Afrika te assesseer. ’n Literatuurstudie en ’n empiriese studie is uitgevoer. Die literatuurstudie is gerig op die aspekte van veiligheidsbestuur en die rol van menslike faktore in lugvaartinstandhouding en die bydrae daarvan tot ’n veiligheidskultuur. Die Lugvaart Tegniese Veiligheidskultuuropname (ATSCS – Airways Technical Safety Culture Survey) is aan al die instandhoudingsingenieurs by ’n groot Suid-Afrikaanse lugredery versprei. Die data wat van 113 respondente ontvang is, is geïnterpreteer en toe ontleed met behulp van die SPSS statistiese sagtewarepakket. Eerstens is die response op die sewe skale van die ATSCS ondersoek om te bepaal of die data vir faktorontleding geskik is. Hoofasfaktorontleding is met behulp van SPSS op die data toegepas, met ’n Varimax-rotasie om vas te stel watter faktore saambondel. Die betroubaarheid van die skale is bepaal deur Chronbach se koëffisiënt alfa te gebruik. Die gemiddelde van gemiddeldes van die gekorrigeerde korrelasies tussen die items van elke skaal is ook bereken om die interne homogeniteit en uni-dimensionaliteit van die verskillende skale te ondersoek. Daarna is die items aan itemontleding onderwerp. Die gemiddelde, standaard afwyking, skeefheid en kurtosis is vir die steekproeftellings van die ATSCS bereken. Die invloed en effek van die biografiese veranderlikes op die instandhoudingsingenieurs se ingesteldheid teenoor veiligheid is bepaal deur die response van verskillende werknemerondergroepe met mekaar te vergelyk met behulp van t-toetse en ANOVA. Die resultate van die t-toetse het aan die lig gebring dat etnisiteit ’n statisties beduidende uitwerking op die veiligheidsingesteldheid het ten opsigte van die bestuur se ingesteldheid teenoor veiligheid en veiligheidsopleiding. Die effek se groottes is bereken om die krag van die verwantskap te bepaal, en daar is bevind dat dit ’n medium effek het. Die ANOVA-resultate dui aan dat opleiding, geografiese ligging en vlootkwalifikasie geen uitwerking op die veiligheidsingesteldheid van die universum het nie. ’n ANOVA van die werkarea het egter aan die lig gebring dat die belangrikste instandhoudingswerkarea beduidend van die ander twee groepe verskil ten opsigte van vyf areas van die Veiligheidskultuuropname (ATSCS). Laastens was die oorkoepelende response van die meerderheid deelnemers aan hierdie studie baie positief ten opsigte van die sewe kernfaktore wat met ingesteldheid teenoor veiligheid verband hou. Daar word voorgestel dat toekomstige ondersoeke van hierdie aard ’n groter steekproef van kruis-kulturele lugrederye in die globale bedryf inkorporeer. Dit sal die eksterne geldigheid van die huidige studie bevestig en die oordrag van bevindinge aan ander instandhoudingsingenieurs ondersteun.
Falconer, Boyd Travis School of Aviation UNSW. "Attitudes to safety and organisational culture in Australian military aviation". Awarded by:University of New South Wales. School of Aviation, 2006. http://handle.unsw.edu.au/1959.4/25751.
Froyuk, K. V., V. M. Luzhbin, S. G. Yehorov, К. В. Фроюк, В. М. Лужбін e С. Г. Єгоров. "Sensors for determining the spatial position of the aircraft". Thesis, National aviation university, 2021. https://er.nau.edu.ua/handle/NAU/50500.
The aviation community must constantly work to improve safety around the world. The work of modern aviation is the need to obtain in real-time the spatial position of aviation systems during the primary and secondary training of operators to operate the above systems. This will not only obtain the characteristics of each operator and identify the patterns of its activities, but also further predict the occurrence of systematic errors inherent in a particular operator.
Авіаційна спільнота повинна постійно працювати над підвищенням безпеки у всьому світі. Робота сучасної авіації полягає у необхідності отримання в реальному часі просторового положення авіаційних систем під час первинної та середньої підготовки операторів з експлуатації вищезазначених систем. Це дозволить не тільки отримати характеристики кожного оператора та виявити закономірності його діяльності, але й надалі передбачити появу систематичних помилок, властивих певному оператору.
Lamy, Christophe A. "The technical boards of aircraft accident investigation in the United States of America & France /". Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33065.
To fulfil their complex mission in the best possible conditions and despite eventual pecuniary constraints, the pressure of the media, or the occasional tensions which may arise in case of concomitance with other investigations, the NTSB and the BEA rely on the renowned professionalism and high technical skills of their employees as well as on the participation in the investigation of members of the aeronautical industry who bring their expertise and contribute to the improvement of air safety.
Cohen, Jonathan E. W. (Jonathan Ephraim Weis) 1976. "Safety at what price? : setting anti-terrorist policies for checked luggage on US domestic aircraft". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/36099.
Includes bibliographical references (leaves 45-46).
In this thesis, we considered the costs and benefits of implementing Positive Passenger Bag Match (PPBM) - an anti-terrorist measure to keep bombs out of checked luggage - on US domestic passenger flights. We constructed a stochastic model for comparing the cost-effectiveness of three alternative approaches to PPBM: no PPBML implementation; a PPBM implementation that is applied to 5% of passengers; and a full (100%) implementation of PPBM. We made ranges of estimates concerning the level of terrorist risk, the costs of PPBM operation, the consequences of successful terrorist bombings, and the anti-terrorist effectiveness of both the partial and full PPBM implementations. Calculations showed that there were circumstances under which each policy was the most cost-effective of the three. Of the three options, not implementing PPBM at all was the most cost-effective approach for the largest percentage of the scenarios considered. We found that 5% PPBM captured the next largest portion of the scenarios, and was generally the optimal strategy when annual PPBMI operation costs were low, when 5% PPBM anti-terrorist effectiveness was high, and when the consequences of successful bombings were severe. We found 100%(. PPBM to be the optimal strategy for most scenarios which involved highly costly terrorist bombings, a high level of terrorist risk, and a 100% PPBM policy that provided much added security over 5% PPBM.
by Jonathan E.W. Cohen.
S.M.
Reckhouse, William. "Optimisation of short term conflict alert safety related systems". Thesis, University of Exeter, 2010. http://hdl.handle.net/10036/3154.
Halefom, Mekonen H. "Tailoring an Airworthiness Document to Unmanned Aircraft Systems: A Case Study of MIL-HDBK-516C". Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/98018.
M.S.
With the popularity of unmanned aircraft systems (UAS), there is a growing need to assess airworthiness for safe operations in shared airspace. Airspace is the available air for aircraft to fly in; most airspaces are regulated and are subject to the jurisdiction of a particular country. In the context of this thesis, shared airspace implies the introduction of UAS into airspace designated for manned aircraft. Airworthiness guidelines are generally statements that state safety requirements to prevent unwanted consequences, such as aircraft accidents. Many governmental agencies such as the U.S. Federal Aviation Administration (FAA) analyzed the risks of UAS to third-parties, all personnel and properties exterior to the aircraft. This thesis concerns the adaptation of existing airworthiness documents written for manned aircraft to UAS. The proposed method has three stages that are applied in sequence to identify relevant and irrelevant airworthiness statements, the building blocks of an airworthiness document, with regard to UAS. This method is applied to MIL-HDBK-516C, Department of Defense Handbook: Airworthiness Certification Criteria, used as a case study. MIL-HDBK-516C is a military handbook used for airworthiness guidance. However, the proposed methodology can be applied to any airworthiness document developed for manned aircraft. This thesis presents a list of all MIL-HDBK-516C airworthiness statements that are directly relevant, indirectly relevant, and irrelevant to UAS; additionally, the indirectly relevant airworthiness statements to UAS are provided along with suggested modification.
Kallinen, Valtteri A. "Collision risk modelling for unmanned aircraft separation and traffic management". Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/232516/1/Valtteri_Kallinen_Thesis.pdf.
Duan, Pengfei. "Predictive Alerting for Improved Aircraft State Awareness". Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1539871688328245.
Kirkland, Ian D. "The risk assessment of aircraft runway overrun accidents and incidents". Thesis, Loughborough University, 2001. https://dspace.lboro.ac.uk/2134/13270.
Carrillo, Cassandra M. "Continuous biometric authentication for authorized aircraft personnel : a proposed design". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FCarrillo.pdf.