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Dissertations / Theses on the topic 'Mean time between failure'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Al, Shaalane Amir. "Improving asset care plans in mining : applying developments from aviation maintenance." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71813.

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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The aim of this thesis is to compare the aviation derived reliability metric known as the Maintenance Free Operating Period (MFOP), with the traditionally used, and commonly found, reliability metric Mean Time Between Failure (MTBF), which has over the years shown some innate disadvantages in the field of maintenance. It will be shown that this is mainly due to MTBF’s inherent acceptance of failure and the unscheduled maintenance therewith directly connected. Moreover, MFOP is successfully applied to a mining specific

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2

Rato, João Carlos Mourão. "Gestão da manutenção da frota das UQE-S2300." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10119.

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Dissertação para obtenção do Grau de Mestre em Engenharia e Gestão Industrial<br>A gestão da manutenção ferroviária apresenta-se actualmente e mais do que nunca como uma actividade estratégica para o desempenho eficaz e eficiente das organizações, possibilitando a estas benefícios de confiança, flexibilidade e redução de custos, representativos por sua vez no conforto, segurança e rapidez do serviço prestado ao utilizador. Na presente dissertação é apresentada uma análise de fiabilidade e gestão da manutenção aplicada a uma frota de 42 automotoras UQE-S2300 pertencentes à CP, que por sua vez s

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3

Labiyi, Femi Gbenga. "The Implementation of Total Productive Maintenance (TPM) InManufacturing Company : A Case Study of XYZ Plastics Manufacturing Company in Nigerian." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-23298.

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The purpose of this thesis is to implement Total Productive Maintenance (TPM) in Nigeria Plastics Manufacturing Company. Manufacturing companies round the world pay huge amount of money for purchasing new equipments to boost their production however nothing or little is done to achieve or obtain full output from the machine for which it is intended to do. Small losses in time or deviations from planned or calculated capability are taken as usual machine performance. But currently as a result of improved capability levels and demand of quality product at lower prices, purchasing latest machine/

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4

Suresh, Nitin. "Mean Time Between Visible Artifacts in Visual Communications." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16238.

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As digital communication of television content becomes more pervasive, and as networks supporting such communication become increasingly diverse, the long-standing problem of assessing video quality by objective measurements becomes particularly important. Content owners as well as content distributors stand to benefit from rapid objective measurements that correlate well with subjective assessments, and further, do not depend on the availability of the original reference video. This thesis investigates different techniques of subjective and objective video evaluation. Our research recommends

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5

Ellington, Jelani H. (Jelani Hester). "The optimization of General Motors' warranty system by reducing mean time to discover failure." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32474.

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Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2005.<br>Includes bibliographical references (p. 54).<br>Warranty is an important part of many organizations. Warranty costs take money directly away from corporations' bottom line. General Motors Corporations warranty liability costs its shareholders upwards of billion dollars annually. General Motors currently uses RedX, a systematic design of experiments methodology, to try to reduce warranty costs. Although this approach has reduced warranty costs, it has not done so neither fast nor sufficiently as

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6

Cheng, Enoch. "Connections between no-arbitrage and the continuous time mean-variance framework." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1836268281&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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7

Bekker, Leonid. "Association between mean residual life (MRL) and failure rate functions for continuous and discrete lifetime distributions." FIU Digital Commons, 2002. http://digitalcommons.fiu.edu/etd/1479.

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The purpose of this study was to correct some mistakes in the literature and derive a necessary and sufficient condition for the MRL to follow the roller-coaster pattern of the corresponding failure rate function. It was also desired to find the conditions under which the discrete failure rate function has an upside-down bathtub shape if corresponding MRL function has a bathtub shape. The study showed that if discrete MRL has a bathtub shape, then under some conditions the corresponding failure rate function has an upside-down bathtub shape. Also the study corrected some mistakes in proofs of

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8

Liakka, Johan. "The mutual interaction between the time-mean atmospheric circulation and continental-scale ice sheets." Doctoral thesis, Stockholms universitet, Meteorologiska institutionen (MISU), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-55931.

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Geomorphological evidence of glaciations exist for the Last Glacial Maximum (about 20 kyr ago). At this time, both North America and Eurasia were covered by extensive ice sheets which are both absent today. However, the temporal and spatial evolution of the ice sheets from the previous interglacial up to the fully-glaciated conditions at LGM is still unresolved and remains a vexing question in climate dynamics. The evolution of ice sheets is essentially controlled by the prevailing climate conditions. On glacial time-scales, the climate is shaped the by the orbital variations of the Earth, but

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9

Tarog, Emanuel S. "Design techniques to improve time dependent dielectric breakdown based failure for CMOS circuits." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/229.

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This project investigates the failure of various CMOS circuits as a result of Time Dependent Dielectric Breakdown (TDDB) and explores design techniques to increase the mean time to failure (MTTF) of large-scale circuits. Time Dependent Dielectric Breakdown is a phenomenon where the oxide underneath the gate degrades as a result of the electric field in the material. Currently, there are few well documented design techniques that can increase lifetime, but with a tool chain I created called the MTTF Analyzing Program, or MAP, I was able to test circuits under various conditions in order to ide

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10

Madonsela, Alex Thulani. "A structured approach for the reduction of mean time to repair of blast furnace D, ArcelorMittal, South Africa, Vanderbijlpark / Madonsela A.T." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7311.

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Organizations are expected by their shareholders to continually deliver above industry returns on capital invested and to remain competitive in the industry of choice through productivity, safety and quality. The maintenance function is a key area in which competitiveness through efficiencies and world–class performance can be attained by focusing on the prevention and reduction of long and costly equipment repair times. The question is: how can the mean time to repair of equipment already installed in the plant be reduced? To answer the above question correctly and comprehensively, the resear

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11

Cederberg, Erik, and Linus Schnitzer. "Closed-End Funds and their Net Asset Value over time : A study of the relationship between Swedish closed-end funds' market prices and their underlying assets over a period of time." Thesis, Internationella Handelshögskolan, Jönköping University, IHH, Nationalekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49109.

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Closed-end funds (CEFs) are popular investments amongst the Swedish population as they provide diversification to investors and have in many cases historically outperformed the market. In deciding whether to invest in a CEF, the method of valuation differs from classical financial ratios used to value most companies, as the revenue-bringing operations differ significantly. The Net Asset Value (NAV) per share is compared to the market price per share of a CEF, to determine if the share is traded at a discount or premium. The purpose is based upon the rationalization that a share’s market price

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12

Speer, Ngoc Anh Phan. "Design and Analysis of Adaptive Fault Tolerant QoS Control Algorithms for Query Processing in Wireless Sensor Networks." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/27221.

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Data sensing and retrieval in WSNs have a great applicability in military, environmental, medical, home and commercial applications. In query-based WSNs, a user would issue a query with QoS requirements in terms of reliability and timeliness, and expect a correct response to be returned within the deadline. Satisfying these QoS requirements requires that fault tolerance mechanisms through redundancy be used, which may cause the energy of the system to deplete quickly. This dissertation presents the design and validation of adaptive fault tolerant QoS control algorithms with the objective to ac

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13

Li, Yubo. "Reliability Techniques for Data Communication and Storage in FPGA-Based Circuits." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3501.

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This dissertation studies the effects of radiation-induced single-event upsets (SEUs) on field-programmable gate array(FPGA)-based circuits. It analyzes and quantifies a special case in data communication, that is, the synchronization issue of signals when they are sent across clock domains in triple modular redundancy (TMR) circuits with the presence of SEUs. After demonstrating that synchronizing errors cannot be eliminated in such case, this dissertation continues to present novel synchronizer designs that can guarantee reliable synchronization of triplicated signals. Fault injection tests

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14

Camara, Louis Richard. "Statistical modeling and assessment of software reliability." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001699.

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15

Manning, James. "A reliability model of a power distribution network with reference to petrochemical and gas-to-liquid plants." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/40819.

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The interruption cost for one hour of a petrochemical plant is 33 times higher than that of the average interruption cost for industrial plants across all industries. In addition to the high cost of loss of production, interruptions to the operations of petrochemical and gas-toliquid plants pose safety and environmental hazards. Thus it is necessary to better understand the reliability requirements of petrochemical and gas-to-liquid plants. This study investigated the reliability of electrical distribution networks used in petrochemical and gas-to-liquid plants compared to those used in

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16

Sjöström, Lars. "Differences in age at breeding between two genetically different populations of brown trout (Salmo trutta)." Thesis, Uppsala universitet, Statistiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388613.

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Survival analysis is an effective tool for conservation studies, since it measure the risk of an event that is important for the survival of populations and preservation of biodiversity. In this thesis three different models for survival analysis are used to estimate the age at breeding between two genetically different populations of brown trout. These populations are an evolutionary enigma, since they apparently coexist in direct competition with each other, which according to ecological theory should not happen. Thus it is of interest if differences between them can be identified. The data

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17

Cho, Jin-Hee. "Design and Analysis of QoS-Aware Key Management and Intrusion Detection Protocols for Secure Mobile Group Communications in Wireless Networks." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29653.

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Many mobile applications in wireless networks such as military battlefield, emergency response, and mobile commerce are based on the notion of secure group communications. Unlike traditional security protocols which concern security properties only, in this dissertation research we design and analyze a class of QoS-aware protocols for secure group communications in wireless networks with the goal to satisfy not only security requirements in terms of secrecy, confidentiality, authentication, availability and data integrity, but also performance requirements in terms of latency, network traffic,

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18

Козачук, Оксана Дмитрівна, та Oksana D. Kozachuk. "Математичні моделі оцінки надійності радіоелектронних систем". Thesis, Національний авіаційний університет, 2021. https://er.nau.edu.ua/handle/NAU/48990.

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Робота присвячена розвитку математичних моделей оцінки надійності радіоелектронних систем (РС) з активними фазованими антенними решітками (АФАР). У роботі розроблений комплекс математичних моделей апроксимації кривих інтенсивностей відмов електрорадіовиробів імовірнісними розподілами, що описують раптові і поступові відмови. Досліджено вплив коефіцієнта надмірності РС з розподіленою структурою при різних імовірнісних розподілах відмов вузлів, каналів і модулів. Побудовані та досліджені моделі оцінки надійності РС з АФАР при раптових і поступових відмовах каналів і модулів. Аналіз вплив

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19

Chu, Chin-Wei, and 朱晉緯. "Improving synchronizer’s mean time between failures." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/j6afqb.

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碩士<br>國立清華大學<br>電機工程學系所<br>105<br>As the semiconductor technology continues to evolve, more and more transistors can be placed on a single chip with more complex functions implemented. These complex functions are usually divided into sub-systems with possibly different clock frequencies and power supplies to achieve better performance. However it’s impossible to check timing constraints directly if signals are transmitted across different clock domains. To deal with this reliability issues, synchronizers are used to synchronize these cross-domain signals to minimize transmission errors. Mean-t

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20

Correia, João Filipe Gonçalves. "Reliability study on avionics: feasibility study to determine mean time between failure (MTBF)." Master's thesis, 2020. http://hdl.handle.net/10400.6/11687.

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In general, the world faces an increase in the pressure to perform faster, better and cheaper, requiring engineers to predict accurately the reliability of products. In the early stages of the design process, these accurate predictions will contribute not only to a more robust and reliable product, but also will drive down the costs associated with redesigning the equipment/component, for example, when a product is already in production and a design error is found or as the result to improve the reliability obtained from operation. The number of electronic components, equipment and systems in

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21

WANG, CHUN-CHIEH, and 王俊傑. "Prediction Telecom Equipment Network Mean Time Between Failures by Random Forest Algorithm." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/p3p728.

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碩士<br>國立高雄科技大學<br>電子工程系<br>107<br>In the era of IoT (Internet of Things) wireless communication system will cover 5G and low-power wide-area network, 5G has high action rate, low latency, ultra-high-speed communication speed, high built-in density, a large number of device connections, disaster prevention, etc. The changes, the information field and the rapid development of the Internet, the rapid development of mobile devices and the rise of social networks, the quality of the Internet is also important in life. In the past, the maintenance of telecommunications networks was waiting for devic

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22

Ya-HsuanHsu and 許雅宣. "Mis-specification effect analyses on the estimated mean-time-to-failure of inverse Gaussian and Wiener degradation process." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/k8xp3s.

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碩士<br>國立成功大學<br>工業與資訊管理學系<br>107<br>In recent years, degradation analysis has widely used to access lifetime of highly reliable products. If there exists quality characteristics whose degradation paths can be related to the reliability of the product, then collecting degradation data can help with evaluating product reliability and lifetime. In this paper, motivated by laser data, we investigate the mis-specification effect on the prediction of product’s MTTF (mean-time-to-failure) when the wrong degradation model is fitted to data. On the basis of the maximum likelihood under a wrong model th

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23

Jung, Hyo-Taeg. "A process for supporting activity-oriented assessment of non-functional requirements on probability of failure and mean-time-to-repair /." 2008. http://proquest.umi.com/pqdweb?did=1597608481&sid=7&Fmt=2&clientId=10361&RQT=309&VName=PQD.

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24

Cronholm, Lillian Marie. "Reliability Engineering Approach to Probabilistic Proliferation Resistance Analysis of the Example Sodium Fast Reactor Fuel Cycle Facility." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9921.

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International Atomic Energy Agency (IAEA) safeguards are one method of proliferation resistance which is applied at most nuclear facilities worldwide. IAEA safeguards act to prevent the diversion of nuclear materials from a facility through the deterrence of detection. However, even with IAEA safeguards present at a facility, the country where the facility is located may still attempt to proliferate nuclear material by exploiting weaknesses in the safeguards system. The IAEA's mission is to detect the diversion of nuclear materials as soon as possible and ideally before it can be weaponized

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