Relevant bibliographies by topics / Lifetime

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Lifetime'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2025

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Journal articles on the topic "Lifetime"

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Omar, Moien A. "The Significance of Considering Battery Service-Lifetime for Correctly Sizing Hybrid PV–Diesel Energy Systems." Energies 17, no. 1 (December 23, 2023): 103. http://dx.doi.org/10.3390/en17010103.

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This study emphasizes how crucial it is to consider battery service lifetime when determining the optimal battery size in PV–diesel hybrid systems. It investigates how battery size influences the evaluation of hybrid systems and their lifetime due to battery cycling. Unlike previous research that relies on assumed battery lifetimes, this study delves into the tangible impact of battery cycling, revealing the intricate relationship between battery size, cycling behavior, and service lifetime. Utilizing HOMER Pro version 3.14.2 software, a case study assessed three battery capacities (300 Ah, 800 Ah, and 1000 Ah) in a hybrid PV system catering to a 24 kWh daily demand. Across varying assumed lifetimes (5, 10, and 20 years), the study found that a 300 Ah battery was the most feasible under a 5-year assumed battery lifetime. However, for 10-year and 20-year battery lifetimes, the 800 Ah system emerged as the optimal choice, emphasizing the influence of assumed lifetime on determining the optimal battery size. Throughput battery lifetime analysis estimated service lifetimes of 4.9, 10.96, and 13.64 years for the 300 Ah, 800 Ah, and 1000 Ah batteries, respectively. Notably, smaller-rated batteries exhibited shorter estimated service lifetimes linked to usage patterns. Among the systems assuming a 20-year calendar lifetime, the optimal 800 Ah system, with a service lifetime of 10.96 years, yielded an energy cost of 0.312 USD/kWh, annual costs of USD 2736.5, and a total cost of USD 37,450. Considering service lifetime, the 800 Ah system emerged as optimal, contrasting the initially favored 300 Ah system under a 5-year assumed lifetime. This underscores the crucial significance of comprehending and integrating service lifetime considerations to optimize the economic feasibility of PV hybrid systems.
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Chung, Gil Yong, Mark J. Loboda, M. J. Marninella, D. K. Schroder, Tamara Isaacs-Smith, and John R. Williams. "Carrier Generation Lifetime in 4H-SiC Epitaxial Wafers." Materials Science Forum 615-617 (March 2009): 283–86. http://dx.doi.org/10.4028/www.scientific.net/msf.615-617.283.

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The pulsed MOS-C (Metal Oxide Semiconductor-Capacitor) technique was used to measure generation lifetimes in 4H-SiC epitaxial wafers. The ratio of generation to recombination lifetime has been investigated to understand the dominant defect for generation lifetime. The EH6/7 defect level is considered to limit generation lifetime and field enhanced emission is proposed to explain extremely large variation of generation lifetime in a small area. Generation lifetime is limited by dislocations when they are above a threshold density of about 106cm-2. Generation lifetimes measured on 4 and 8 degree off-cut angle epi-substrates are very comparable.
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Chung, Gil Yong, Mark J. Loboda, Mike F. MacMillan, Jian Wei Wan, and Darren M. Hansen. "Carrier Lifetime Analysis by Microwave Photoconductive Decay (μ-PCD) for 4H SiC Epitaxial Wafers." Materials Science Forum 556-557 (September 2007): 323–26. http://dx.doi.org/10.4028/www.scientific.net/msf.556-557.323.

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Excess carrier lifetimes in 4H SiC epitaxial wafers were characterized by microwave photoconductive decay (o/PCD). The measured decay compromised of surface and bulk recombination curves have fast and slow components. Measured lifetimes are not changed with various surface passivation techniques. High resolution lifetime maps show good correlation with stress birefringence images and lower lifetime around extended material defects like grainboundaries, defect clusters, edge defects and polytype switching bands. Chlorosilane based CVD epiwafers show higher bulk lifetime values than standard silane based CVD materials due to less bulk lifetime defect density.
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Brismar, H., O. Trepte, and B. Ulfhake. "Spectra and fluorescence lifetimes of lissamine rhodamine, tetramethylrhodamine isothiocyanate, texas red, and cyanine 3.18 fluorophores: influences of some environmental factors recorded with a confocal laser scanning microscope." Journal of Histochemistry & Cytochemistry 43, no. 7 (July 1995): 699–707. http://dx.doi.org/10.1177/43.7.7608524.

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We report on the spectra and fluorescence lifetimes of four commonly used fluorophores: lissamine rhodamine (LRSC); tetramethyl rhodamine isothiocyanate (TRITC); Texas Red; and cyanine 3.18 (Cy-3). Fluorescence lifetime recordings revealed that these spectrally overlapping fluorophores can be individually detected by their lifetimes, indicating that at least four fluorophores can be individually identified in discrete tissue domains by confocal microscopy. A further advantage of lifetime recordings is that fluorophores that emit light within the same wavelength band can be used and chromatic aberrations are therefore circumvented, thereby improving the spatial accuracy in imaging of multiple fluorophores. Low and high pH, respectively, tended to influence fluorophore emission spectra and fluorescence lifetime. IgG conjugation of the fluorophores tended to shift the spectra towards longer wavelengths and to change the fluorescence lifetimes. The IgG-conjugated form of the fluorophores may, when applied to tissue specimens, change the emission spectrum and lifetime. In addition, different tissue embedding procedures may influence fluorescence lifetime. These observations emphasize the importance of spectral and lifetime characterization of fluorescent probes within the chemical context in which they will be used experimentally. Changes in spectra and fluorescence lifetimes may be a useful tool to gain information about the chemical environment of the fluorophores.
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Thomas, T. D., and T. X. Carroll. "Inner-shell lifetimes from lifetime-vibrational interference." Chemical Physics Letters 185, no. 1-2 (October 1991): 31–35. http://dx.doi.org/10.1016/0009-2614(91)80134-j.

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Waters, P. Dean, and David H. Burns. "Optimized Gated Detection for Lifetime Measurement over a Wide Range of Single Exponential Decays." Applied Spectroscopy 47, no. 1 (January 1993): 111–15. http://dx.doi.org/10.1366/0003702934048622.

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Optimal estimation parameters are determined for the rapid lifetime determination technique (RLD) of fitting an exponential model to luminescence decay data that exhibit a wide range of lifetimes. Optimization of the lifetime estimate by this technique depends on only two parameters—period of integration and separation between the periods of integration. Luminescence quenching experiments produce a range of decay lifetimes. Selection of a fixed set of measuring parameters to determine lifetime throughout the entire range can simplify instrumentation and result in enhanced computation speed. The measuring parameters must be optimized to yield the best estimation of each lifetime in the range. The errors in measured lifetime for the RLD technique are investigated for a wide range of luminescence decays. Optimal separation and periods of integration for the modified RLD technique are found by modeling a set of simulated decay data with different lifetimes. Results from the simulation are then compared to similar measurements of oxygen-quenched luminescence decay. Agreement between simulation and quenching data is good.
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Hoffmann, L., C. M. Hoppe, R. Müller, G. S. Dutton, J. C. Gille, S. Griessbach, A. Jones, et al. "Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies." Atmospheric Chemistry and Physics Discussions 14, no. 11 (June 25, 2014): 16865–906. http://dx.doi.org/10.5194/acpd-14-16865-2014.

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Abstract. Chlorofluorocarbons (CFCs) play a key role in stratospheric ozone loss and are strong infrared absorbers that contribute to global warming. The stratospheric lifetimes of CFCs are a measure of their global loss rates that are needed to determine global warming and ozone depletion potentials. We applied the tracer-tracer correlation approach to zonal mean climatologies from satellite measurements and model data to assess the lifetimes of CFCl3 (CFC-11) and CF2Cl2 (CFC-12). We present estimates of the CFC-11/CFC-12 lifetime ratio and the absolute lifetime of CFC-12, based on a reference lifetime of 52 yr for CFC-11. We analyzed climatologies from three satellite missions, the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS), the HIgh Resolution Dynamics Limb Sounder (HIRDLS), and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). We found a CFC-11/CFC-12 lifetime ratio of 0.47±0.08 and a CFC-12 lifetime of 111(96–132) yr for ACE-FTS, a ratio of 0.46±0.07 and a lifetime of 112(97–133) yr for HIRDLS, and a ratio of 0.46±0.08 and a lifetime of 112(96–135) yr for MIPAS. The error-weighted, combined CFC-11/CFC-12 lifetime ratio is 0.47±0.04 and the CFC-12 lifetime estimate is 112(102–123) yr. These results agree with the recent Stratosphere-troposphere Processes And their Role in Climate (SPARC) reassessment, which recommends lifetimes of 52(43–67) yr and 102(88–122) yr, respectively. Having smaller uncertainties than the results from other recent studies, our estimates can help to better constrain CFC-11 and CFC-12 lifetime recommendations in future scientific studies and assessments. Furthermore, the satellite observations were used to validate first simulation results from a new coupled model system, which integrates a Lagrangian chemistry transport model into a climate model. For the coupled model we found a CFC-11/CFC-12 lifetime ratio of 0.48±0.07 and a CFC-12 lifetime of 110(95–129) yr, based on a ten-year perpetual run. Closely reproducing the satellite observations, the new model system will likely become a useful tool to assess the impact of advective transport, mixing, and photochemistry as well as climatological variability on the stratospheric lifetimes of long-lived tracers.
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Hoffmann, L., C. M. Hoppe, R. Müller, G. S. Dutton, J. C. Gille, S. Griessbach, A. Jones, et al. "Stratospheric lifetime ratio of CFC-11 and CFC-12 from satellite and model climatologies." Atmospheric Chemistry and Physics 14, no. 22 (November 27, 2014): 12479–97. http://dx.doi.org/10.5194/acp-14-12479-2014.

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Abstract. Chlorofluorocarbons (CFCs) play a key role in stratospheric ozone loss and are strong infrared absorbers that contribute to global warming. The stratospheric lifetimes of CFCs are a measure of their stratospheric loss rates that are needed to determine global warming and ozone depletion potentials. We applied the tracer–tracer correlation approach to zonal mean climatologies from satellite measurements and model data to assess the lifetimes of CFCl3 (CFC-11) and CF2Cl2 (CFC-12). We present estimates of the CFC-11/CFC-12 lifetime ratio and the absolute lifetime of CFC-12, based on a reference lifetime of 52 years for CFC-11. We analyzed climatologies from three satellite missions, the Atmospheric Chemistry Experiment-Fourier Transform Spectrometer (ACE-FTS), the HIgh Resolution Dynamics Limb Sounder (HIRDLS), and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). We found a CFC-11/CFC-12 lifetime ratio of 0.47±0.08 and a CFC-12 lifetime of 112(96–133) years for ACE-FTS, a ratio of 0.46±0.07 and a lifetime of 113(97–134) years for HIRDLS, and a ratio of 0.46±0.08 and a lifetime of 114(98–136) years for MIPAS. The error-weighted, combined CFC-11/CFC-12 lifetime ratio is 0.46±0.04 and the CFC-12 lifetime estimate is 113(103–124) years. These results agree with the recent Stratosphere-troposphere Processes And their Role in Climate (SPARC) reassessment, which recommends lifetimes of 52(43–67) years and 102(88–122) years, respectively. Having smaller uncertainties than the results from other recent studies, our estimates can help to better constrain CFC-11 and CFC-12 lifetime recommendations in future scientific studies and assessments. Furthermore, the satellite observations were used to validate first simulation results from a new coupled model system, which integrates a Lagrangian chemistry transport model into a climate model. For the coupled model we found a CFC-11/CFC-12 lifetime ratio of 0.48±0.07 and a CFC-12 lifetime of 110(95–129) years, based on a 10-year perpetual run. Closely reproducing the satellite observations, the new model system will likely become a useful tool to assess the impact of advective transport, mixing, and photochemistry as well as climatological variability on the stratospheric lifetimes of long-lived tracers.
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Guo, Wei Feng, Xiang Lei Chen, Huai Jiang Du, Hui Min Weng, and Bang Jiao Ye. "Positron Annihilation in Carbon Nanotubes." Materials Science Forum 607 (November 2008): 198–200. http://dx.doi.org/10.4028/www.scientific.net/msf.607.198.

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Positron annihilation lifetime spectra have been measured in carbon nanotubes being pressed as a function of pressure up to 1536MPa. In addition, positron lifetime experiments for carbon nanotubes in vacuum, nitrogen and air have been performed respectively. Lifetimes have been obtained using LIFETIME program. The results display a single-component positron annihilation lifetime. Positron lifetime for carbon nanotubes decreases as the pressure increases, but lifetime is basically consistent after the pressure of 960MPa. Positron annihilation lifetime for carbon nanotubes in air is the shortest whereas the lifetime in vacuum the longest. We conclude that a positron annihilates with an electron on the external surface of carbon nanotubes.
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Sodemann, Harald. "Beyond Turnover Time: Constraining the Lifetime Distribution of Water Vapor from Simple and Complex Approaches." Journal of the Atmospheric Sciences 77, no. 2 (January 10, 2020): 413–33. http://dx.doi.org/10.1175/jas-d-18-0336.1.

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Abstract The time water vapor spends in the atmosphere from evaporation to precipitation, termed here the water vapor lifetime, is of fundamental relevance for characterizing the water cycle, for the turnover of mass and energy, causes of precipitation extremes, and the recycling of precipitation over land. While the global average lifetime of water vapor is commonly considered as about 8–10 days, recent work indicates that the distribution of water vapor lifetimes is highly skewed, and that a large part of the water vapor could have average lifetimes of about 4–5 days. Besides calling for scrutiny of these new estimates, these findings also prompt an investigation of the factors shaping the distribution of the lifetime of water vapor. Using idealized setups and reanalysis data, I explore the influence of heterogeneity and nonstationarity on water vapor age and lifetime. The combination of nonstationarity and heterogeneity allows for short and long local lifetimes and water vapor ages, while maintaining the global average mass balance and corresponding mean water vapor lifetime. A plausibility argument based on humidity-weighted winds suggests that median lifetimes of 4–5 days are more consistent with weather system patterns in the extratropics. I propose that the median of the lifetime is more representative, since its mean value is affected by uncertainty originating from a long, thin tail. To more comprehensively understand the water vapor lifetime, methods will need to report the full lifetime distribution. Simulations with artificial water tracers could thereby provide the framework to compare different methods consistently in the future, while stable water isotopes could serve as an observational constraint.
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More sources

Dissertations / Theses on the topic "Lifetime"

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Kuchenbecker, Emily E. "Lifetime." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5838.

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Time is my bully. Time marks the start of something, as well as the end. We are all carrying out the inexorable passing of time as it relates to our impending mortalities. I do not fear death. The awareness of my body’s impermanence employs me to feel that much more connected to the vessel containing that of which I am. But what am I? Am I my body- or is it much deeper? Through the work executed during my graduate research, I have attempted to quantify my existence through the archiving my time and body. This document ushers you through my perception, my relationship to nature, and how it manifests through discovering answers to what I believe it means to be human.
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Alghamdi, Saeed Ahmad Ali Dobbah. "Discrete lifetime data." Thesis, University of Southampton, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494664.

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Madeira, Maria João da Costa. "Customer LifeTime Value." Master's thesis, FEUC, 2014. http://hdl.handle.net/10316/27594.

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Relatório de estágio do mestrado em Gestão, apresentado à Faculdade de Economia da Universidade de Coimbra, sob a orientação de Arnaldo Coelho, António Fery Antunes e António Oliveira Antunes.
Este relatório tem por objetivo traduzir o passado em quatro meses de trabalho, o período do meu estágio curricular. O tema escolhido foi o Customer LifeTime Value (CLV), um assunto atual, que tem dado origem a inúmeros estudos conceptuais e empíricos. Com este projeto pretendo mostrar que a empresa onde realizei o meu estágio, Banco Comercial Português, S.A. está cada vez mais preocupada em investir no relacionamento com os seus clientes. Hoje em dia é impossível para setor dos serviços sobreviver sem uma estratégia focada no marketing relacional, em particular pretendo comprovar esta reflexão na instituição onde decorreu o meu estágio. Tendo o próprio conceito de marketing como o ponto de partida, irei começar o meu trabalho explicando as origens do marketing de relacionamento, um conceito focado no cliente e na sua satisfação, com o intuito de o fidelizar. A ideia não é completamente nova, desde as primeiras trocas comerciais reconhecia-se que manter uma relação com um cliente, que não fosse apenas uma simples troca esporádica, seria benéfico para ambas as partes. Assim, os clientes podem beneficiar de eventuais facilidades de pagamento, descontos e acima de tudo, um conhecimento prévio da qualidade do produto, enquanto os comerciantes beneficiam de lucro imediato. Hoje em dia, existem algumas empresas pequenas que conseguiram sobreviver graças à relação que eles têm vindo a construir com seus clientes ao longo dos anos. Em seguida abordarei a temática da lealdade como vínculo inevitável desta área de estudo. Apenas o desenvolvimento de uma relação de proximidade com o cliente por si só não basta, deve existir um esforço da entidade para o conseguir fidelizar, impulsionando nele a lealdade para com a instituição e/ou a marca. Tudo isto serve de base ao tema central deste estudo, o CLV. Investir num relacionamento estável pode dar origem a retornos significativos, adicionalmente ter a capacidade de prever com precisão o valor dos clientes trará inevitavelmente um enorme impacto sobre a capacidade de tomar decisões inteligentes. Esta é a lógica seguida pela metodologia CLV que detalharei. Os resultados obtidos permitem-me dizer que esta é uma empresa bem consciente da importância da área em estudo CLV, uma vez que faz uso de fatores relacionais, implementa-os ativamente na sua formulação estratégica como fontes de vantagem competitiva.
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Nordfors, Per. "Prediction of Code Lifetime." Thesis, Linköpings universitet, Statistik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-135060.

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There are several previous studies in which machine learning algorithms are used to predict how fault-prone a piece of code is. This thesis takes on a slightly different approach by attempting to predict how long a piece of code will remain unmodified after being written (its “lifetime”). This is based on the hypothesis that frequently modified code is more likely to contain weaknesses, which may make lifetime predictions useful for code evaluation purposes. In this thesis, the predictions are made with machine learning algorithms which are trained on open source code examples from GitHub. Two different machine learning algorithms are used: the multilayer perceptron and the support vector machine. A piece of code is described by three groups of features: code contents, code properties obtained from static code analysis, and metadata from the version control system Git. In a series of experiments it is shown that the support vector machine is the best performing algorithm and that all three feature groups are useful for predicting lifetime. Both the multilayer perceptron and the support vector machine outperform a baseline prediction which always outputs the mean lifetime of the training set. This indicates that lifetime to some extent can be predicted based on information extracted from the code. However, lifetime prediction performance is shown to be highly dataset dependent with large error magnitudes.
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Li, Xiang. "Lifetime prediction for rocks." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2013. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-126371.

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A lifetime prediction scheme is proposed based on the assumption that the lifetime (time to failure) of rocks under load is governed by the growth of microstructual defects (microcracks). The numerical approach is based on linear elastic fracture mechanics. The numerical calculation scheme is implemented as a cellular automat, where each cell contains a microcrack with length and orientation following certain distributions. The propagation of the microcrack is controlled by the Charles equation, based on subcritical crack growth. The zone inside the numerical model fails if the microcrack has reached the zone dimension or the stress intensity factor of the crack reached the fracture toughness. Macroscopic fractures are formed by these coalesced propagating microcracks, and finally lead to failure of the model. In the numerical approaches, elasto-plastic stress redistributions take place during the forming of the macroscopic fractures. Distinct microcrack propagation types have been programmed and applied to the proposed numerical models. These numerical models are studied under different loading conditions. Numerical results with excellent agreement with the analytical solutions are obtained with respective to predicted lifetime, important parameters for the microcracks, fracture pattern and damage evolution. Potential applications of the proposed numerical model schemes are investigated in some preliminary studies and simulation results are discussed. Finally, conclusions are drawn and possible improvements to the numerical approaches and extensions of the research work are given
本文认为微结构缺陷（微裂纹）的扩展决定了受力岩石的寿命（破坏时间）。基于此假设，提出了岩石寿命预测方法。利用线弹性断裂力学理论，通过FLAC进行了数值模拟。数值模型中每个单元定义一条初始裂纹，其长度与方向服从特定分布。基于亚临界裂纹扩展理论，由Charles方程决定微裂纹的扩展（速度）。如微裂纹发展至单元边界，或应力强度系数到达断裂韧度，则单元破坏。宏观裂纹由微裂纹所联合形成，并最终贯穿模型导致破坏。在形成宏观裂纹的过程中，发生弹塑性应力重分布。在数值模型中，编制了不同类型的微裂纹扩展方式，并在不同的受力条件下加以分析。数值模型的岩石寿命，裂纹形状，破坏方式以及一些重要的参数的数值模拟结果与解析解有较好的一致性。对本文所提出的数值模型的初步实际应用进行了分析，并讨论了计算结果。最后讨论了本文所提出的岩石寿命预测方法的可能改良与发展，并对进一步的研究工作给出建议。
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PAIXÃO, Ana Carla Percontini da. "New Extended Lifetime Distributions." Universidade Federal de Pernambuco, 2014. https://repositorio.ufpe.br/handle/123456789/12240.

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Submitted by Etelvina Domingos (etelvina.domingos@ufpe.br) on 2015-03-12T18:21:25Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) TESE Ana Carla Percontini da Paixão.pdf: 2309750 bytes, checksum: 1f4caced5454dee673c1e41705168ad0 (MD5)
Made available in DSpace on 2015-03-12T18:21:26Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) TESE Ana Carla Percontini da Paixão.pdf: 2309750 bytes, checksum: 1f4caced5454dee673c1e41705168ad0 (MD5) Previous issue date: 2014
Este trabalho está dividido em quatro capítulos independentes. Nos Capítulos 2 e 3 propomos extensões para a distribuição Weibull. A primeira delas, com cinco parâmetros, é uma composição das distribuições beta e Weibull Poisson. Essa nova distribuição tem como submodelos algumas importantes distribuições descritas na literatura e outras ainda não discutidas tais como: bata exponencial Poisson, Weibull Poisson exponencializada, Rayleigh Poisson exponencializada, beta Weibull, Weibull, exponencial, entre outras. Obtemos algumas propriedades matemáticas tais como momentos ordinários e incompletos, estatísticas de ordem e seus momentos e entropia de Rényi. Usamos o método da máxima verossimilhança para obter estimativas dos parâmetros. A potencialidade desse novo modelo é mostrada por meio de um conjunto de dados reais. A segunda extensão, com quatro parâmetros, é uma composição das distribuições Poisson generalizada e Weibull, tendo a Poisson generalizada exponencial, a Rayleigh Poisson, Weibull Poisson e Weibull como alguns de seus sub-modelos. Várias propriedades matemáticas foram investigadas, incluíndo expressões explícitas para os momentos ordinários e incompletos, desvios médios, função quantílica, curvas de Bonferroni e Lorentz, con abilidade e as entropias de Rényi e Shannon. Estatísticas de ordem e seus momentos são investigados. A estimativa de parâmetros é feita pelo método da máxima verossimilhança e é obtida a matriz de informação obsevada. Uma aplicação a um conjunto de dados reais mostra a utilidade do novo modelo. Nos dois últimos capítulos propomos duas novas classes de distribuições. No Capítulo 4 apresentamos a família G- Binomial Negativa com dois parâmetros extras. Essa nova família inclui como caso especial um modelo bastante popular, a Weibull binomial negativa, discutida por Rodrigues et al.(Advances and Applications in Statistics 22 (2011), 25-55.) Algumas propriedades matemáticas da nova classe são estudadas, incluindo momentos e função geradora. O método de máxima verossimilhança é utilizado para obter estimativas dos parâmetros. A utilidade da nova classe é mostrada através de um exemplo com conjuntos de dados reais. No Capítulo 5 apresentamos a classe Zeta-G com um parâmetro extra e algumas nova distribuições desta classe. Obtemos expressões explícitas para a função quantílica, momentos ordinários e incompletos, dois tipos de entropia, con abilidade e momentos das estatísticas de ordem. Usamos o método da máxima verossimilhança para estimar os parâmetros e a utilidade da nova classe é exempli cada com um conjunto de dados reais.
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Chan, Shek-lun Conan. "Adaptable housing in Hing Wah Estate II." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25948453.

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Bayrak, Hakan. "Lifetime Condition Prediction For Bridges." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613793/index.pdf.

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Infrastructure systems are crucial facilities. They supply the necessary transportation, water and energy utilities for the public. However, while aging, these systems gradually deteriorate in time and approach the end of their lifespans. As a result, they require periodic maintenance and repair in order to function and be reliable throughout their lifetimes. Bridge infrastructure is an essential part of the transportation infrastructure. Bridge management systems (BMSs), used to monitor the condition and safety of the bridges in a bridge infrastructure, have evolved considerably in the past decades. The aim of BMSs is to use the resources in an optimal manner keeping the bridges out of risk of failure. The BMSs use the lifetime performance curves to predict the future condition of the bridge elements or bridges. The most widely implemented condition-based performance prediction and maintenance optimization model is the Markov Decision Process-based models (MDP). The importance of the Markov Decision Process-based model is that it defines the time-variant deterioration using the Markov Transition Probability Matrix and performs the lifetime cost optimization by finding the optimum maintenance policy. In this study, the Markov decision process-based model is examined and a computer program to find the optimal policy with discounted life-cycle cost is developed. The other performance prediction model investigated in this study is a probabilistic Bi-linear model which takes into account the uncertainties for the deterioration process and the application of maintenance actions by the use of random variables. As part of the study, in order to further analyze and develop the Bi-linear model, a Latin Hypercube Sampling-based (LHS) simulation program is also developed and integrated into the main computational algorithm which can produce condition, safety, and life-cycle cost profiles for bridge members with and without maintenance actions. Furthermore, a polynomial-based condition prediction is also examined as an alternative performance prediction model. This model is obtained from condition rating data by applying regression analysis. Regression-based performance curves are regenerated using the Latin Hypercube sampling method. Finally, the results from the Markov chain-based performance prediction are compared with Simulation-based Bi-linear prediction and the derivation of the transition probability matrix from simulated regression based condition profile is introduced as a newly developed approach. It has been observed that the results obtained from the Markov chain-based average condition rating profiles match well with those obtained from Simulation-based mean condition rating profiles. The result suggests that the Simulation-based condition prediction model may be considered as a potential model in future BMSs.
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Ratzlaff, Charles R. "Lifetime physical activity and osteoarthritis." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/36735.

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Introduction: The overall goal of this thesis is to improve understanding of physical activity (PA), one of the most important, modifiable but controversial risk factors in osteoarthritis (OA). OA is the major public health problem in musculoskeletal medicine and leading cause of physical disability in older adults. The ultimate purpose is to provide evidence to inform OA prevention strategies, something not currently available. Objectives: 1) To construct and describe lifetime trajectories of hip and knee joint force from physical activity in a large Canadian sample; 2) To validate self-report measures of medically-diagnosed OA and novel measures of joint vulnerability against clinical criteria; 3) To evaluate the relationship of lifetime joint force and hip and knee OA. Methods: PA data were collected online from 4,269 subjects via a validated PA survey in a national population-based cohort from 2005 to 2007 and subjects ranked and lifetime trajectories plotted in terms of the ‘cumulative peak force index’, a novel joint force measure. Validation studies were conducted in a sub-sample. Population-based multivariable studies examining the relationship between joint force and incident hip and prevalent knee OA were conducted. Results: 1) Overall women had slightly higher lifetime PA-related force then men. Six percent of subjects developed hip OA and seven percent knee OA during follow up. There was no risk from sport/recreational activity. Very high levels of total lifetime force (hip and knee), occupational force in men (knee) and household-related force in women (knee) were associated with an approximate 2-fold increase in risk of OA, as was previous joint injury (5-fold increase hip, 3-fold knee). At the knee, lower limb malalignment but not joint hypermobility, was associated with knee OA. Higher coordination was protective. Conclusions: Taken collectively, the results show that lifelong physical activity-related joint force is generally safe for the hip and knee, and the promotion of exercise as a major public health initiative should continue without concern for increased rates of OA. Very high levels of occupational force in men and household force in women were risk factors for knee OA. Joint injury, lower limb malalignment and lower coordination were associated with OA.
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Ven, Justin William van de. "Redistribution during the working lifetime." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408209.

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Books on the topic "Lifetime"

1

Frings, Manfred S. Lifetime. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0127-3.

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(Japan), Kokuritsu Kokusai Bijutsukan, Kokuritsu Shin Bijutsukan (Tokyo, Japan), and Nagasaki-ken Bijutsukan, eds. Lifetime. Tōkyō: Suiseisha, 2019.

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Rein, Stefan. Lifetime Spectroscopy. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27922-9.

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Foundation, Joseph Rowntree. Lifetime homes. [S.l.]: Joseph Rowntree Foundation, 2000.

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Friedman, David P. Lifetime health. Austin, Tex: Holt, Rineheart and Winston, 2004.

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Sally, Almekinders, ed. Lifetime fitness. 4th ed. Scottsdale, Ariz: Gorsuch Scarisbrick, 1996.

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Brown, H. Larry. Lifetime fitness. 3rd ed. Scottsdale, Ariz: Gorsuch Scarisbrick, 1992.

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Ransom, Dana. Lifetime investment. New York, NY: Kensington Pub. Corp., 1993.

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McIntosh, Mathew. Lifetime aerobics. Dubuque, IA: Wm. C. Brown Publishers, 1990.

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Foundation, Joseph Rowntree, ed. Lifetime homes. York: Joseph Rowntree Foundation, 1993.

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Book chapters on the topic "Lifetime"

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Frings, Manfred S. "Time Structures Among Values." In Lifetime, 1–78. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0127-3_1.

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Frings, Manfred S. "Life and Time." In Lifetime, 79–143. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0127-3_2.

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Frings, Manfred S. "At the Crossroads of the Present and the Future." In Lifetime, 144–220. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0127-3_3.

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Weik, Martin H. "lifetime." In Computer Science and Communications Dictionary, 888. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_10144.

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Bradford, Camille, and Jack Mayer. "Lifetime Addresses." In Future Directions in Postal Reform, 365–74. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1671-2_20.

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Roe, Robinson, and Peter Dalton. "Lifetime Value." In Giving Hope: The Journey of the For-Purpose Organisation and Its Quest for Success, 141–51. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6145-6_8.

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Wellmer, Friedrich-Wilhelm. "Production Lifetime." In Economic Evaluations in Exploration, 51–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-02578-9_8.

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Carmignani, Nicola. "Lifetime Measurements." In Springer Theses, 43–52. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25798-3_4.

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Shekhar, Shashi, and Hui Xiong. "Index Lifetime." In Encyclopedia of GIS, 483. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-35973-1_594.

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Donaldson, Anthony L. "Lifetime Considerations." In Gas Discharge Closing Switches, 325–44. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2130-7_12.

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Conference papers on the topic "Lifetime"

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Wilson, Helen, Jenu Chacko, and Kevin W. Eliceiri. "Long lifetime distributions as a factor in fluorescence lifetime imaging variability." In Multiphoton Microscopy in the Biomedical Sciences XXV, edited by Ammasi Periasamy, Peter T. So, and Karsten König, 73. SPIE, 2025. https://doi.org/10.1117/12.3042298.

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Ragab, Saif, Nanxue Yuan, Navid I. Nizam, Amit Verma, Margarida M. Barroso, and Xavier Intes. "Sub-diffusive lifetime reconstruction through high spatial frequency in macroscopic fluorescence lifetime imaging." In Multimodal Biomedical Imaging XX, edited by Xavier Intes, Marien Ochoa, and Mohammad A. Yaseen, 46. SPIE, 2025. https://doi.org/10.1117/12.3055631.

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MARCIANO, W. J. "Neutron Lifetime Theory." In Next Generation Experiments to Measure the Neutron Lifetime. WORLD SCIENTIFIC, 2014. http://dx.doi.org/10.1142/9789814571678_0001.

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Sevick-Muraca, Eva M., and Christina L. Burch. "Fluorescence and Phosphorescence Lifetime-Based Sensing in Tissues." In Advances in Optical Imaging and Photon Migration. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/aoipm.1994.trbsdi.156.

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The use of fluorescent and phosphorescent optical probes for non-invasive chemical-based sensing in tissues is investigated using finite element computations. The results show that when the lifetime of the probe is significantly longer than the time associated with photon migration, the origin of the re-emitted signal becomes located closest to the surface. In order to probe more deeply, optical probes with lifetimes on the order of photo migration times are required. In such cases, deconvolution of the photon migration times from probe lifetimes are necessary for lifetime-based biochemical sensing in tissues.
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Schweitzer, D., A. Kolb, and M. Hammer. "Autofluorescence lifetime measurements in images of the human ocular fundus." In European Conference on Biomedical Optics. Washington, D.C.: Optica Publishing Group, 2001. http://dx.doi.org/10.1364/ecbo.2001.4432_29.

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Measurements of the autofluorescence at the fundus prove to be an important tool in early diagnosis and in discovering the pathomechanism, e. g., in age-related macular degeneration. In addition to the action of lipofuscin in the ageing process, flavines play an important role as prosthetic groups. As metabolic changes occur at cellular level, patient–specific optimized therapy should be possible according to endogenous fluorophores, before morphological alterations are manifest. As a first tool for the detection of dynamic autofluorescence, a laser scanner ophthalmoscope will be presented permitting lifetime measurements at the living human eye-ground under extremely weak detectable light. Considering histograms of lifetimes after excitation at 457.8 nm and determined at the living human eye ground in parapapillary region, a lifetime τ ≅ 1.38 ns was calculated most frequently in the long-wave emission range (λ>550 nm). This points to the main contribution of lipofuscin. If the emission range is extended down to 515 nm, components with longer lifetimes are additionally detectable. Lifetime measurements at a human fundus specimen confirmed the lifetime of 1.38 ns in lipofuscin-rich pigment epithelium, whereas the mean lifetime of an intact fundus was 2.04 ns. A comparison of lifetimes before, during, and after breathing of 100% oxygen results in a quenching of the mean lifetime of 0.15 ns by oxygen.
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Ferbel, Thomas. "Lifetimes and Lifetime Ratios of b Hadrons Obtained at D0." In International Europhysics Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2007. http://dx.doi.org/10.22323/1.021.0226.

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HIRATA, K. "BEAM LIFETIME." In Proceedings of the Joint US–CERN–Japan–Russia School on Particle Accelerators. WORLD SCIENTIFIC, 1999. http://dx.doi.org/10.1142/9789812818003_0007.

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Laxer, Cary. "A Lifetime of Learning, A Lifetime of Educating." In SIGCSE '21: The 52nd ACM Technical Symposium on Computer Science Education. New York, NY, USA: ACM, 2021. http://dx.doi.org/10.1145/3408877.3432593.

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Pillai, R., S. Dryepondt, and B. A. Pint. "High Temperature Oxidation Lifetime Modeling of Thin-Walled Components." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-90505.

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Abstract High temperature material solutions for future power generation applications require longer component lifetimes at higher temperatures to improve durability and efficiency. From a research and development point of view, the lifetimes are too long for experimental verification. Thus, accurate lifetime models are needed. Examples are provided where modeling is being applied to lifetime prediction of thin-walled NiCr wrought alloy components. Specific laboratory experiments have been conducted for alloy X at 900°–950°C in dry air and air with water vapor with cycle times from 1 to 500 h. Along with microstructure characterization, comparisons are made between experiment and model predictions. The eventual goal is to predict both oxidation and mechanical behavior.
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HUFFMAN, P. R. "Overview of Magnetic Trapping Neutron Lifetime Experiments." In Next Generation Experiments to Measure the Neutron Lifetime. WORLD SCIENTIFIC, 2014. http://dx.doi.org/10.1142/9789814571678_0003.

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Reports on the topic "Lifetime"

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Zisman, M. S. Luminosity Lifetime. Office of Scientific and Technical Information (OSTI), April 1997. http://dx.doi.org/10.2172/941721.

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Adam, Stuart. Lifetime ISAs. The IFS, October 2016. http://dx.doi.org/10.1920/ps.ifs.2024.0591.

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Bongaarts, John, and Griffith Feeney. Estimating mean lifetime. Population Council, 2003. http://dx.doi.org/10.31899/pgy6.1085.

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Freeman, A. E. Gene. Lifetime Net Merit. Ames (Iowa): Iowa State University, January 2004. http://dx.doi.org/10.31274/ans_air-180814-924.

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Brown, Jeffrey, Jeffrey Kling, Sendhil Mullainathan, and Marian Wrobel. Framing Lifetime Income. Cambridge, MA: National Bureau of Economic Research, May 2013. http://dx.doi.org/10.3386/w19063.

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Welch, Cynthia F., Paul Herrick Smith, Eric M. Weis, Michael W. Blair, Timothy Amos Stone, Douglas Kirk Veirs, Kirk Patrick Reeves, et al. Lifetime Extension Report: Progress on the SAVY-4000 Lifetime Extension Program. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1325661.

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Abrigo,, Michael Ralph, Connie Bayudan-Dacuycuy, and Aniceto Jr Orbeta. COVID-19-induced Human Capital Shocks, Lifetime Labor Productivity, and Inequality. Philippine Institute for Development Studies, March 2023. http://dx.doi.org/10.62986/dp2023.06.

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Using a human capital model with stochastic lifetimes, this study assesses the potential long-term impacts of human capital spending shocks in the early years of the COVID-19 pandemic on survival, lifetime income, and inequality. In the model, health and education spending separately affect survival rates and potential labor productivity, allowing the authors to trace how the pandemic’s effects may propagate through the economic lifecycle. Using recent National Transfer Account estimates for the Philippines, simulation results suggest that the COVID-19 pandemic is likely to negatively affect health and labor productivity, potentially worsening income inequality in the long run. These impacts appear to be more pronounced for some birth cohorts.
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Bizek, H. M. The extended Touschek lifetime. Office of Scientific and Technical Information (OSTI), February 1996. http://dx.doi.org/10.2172/188644.

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Huggett, Mark, Gustavo Ventura, and Amir Yaron. Sources of Lifetime Inequality. Cambridge, MA: National Bureau of Economic Research, July 2007. http://dx.doi.org/10.3386/w13224.

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Brewer, Mike, Monica Costa Dias, and Jonathan Shaw. Lifetime inequality and redistribution. Institute for Fiscal Studies, October 2012. http://dx.doi.org/10.1920/wp.ifs.2012.1223.

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