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Dissertations / Theses on the topic 'Survival probability'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Zaganides, Alexia. "Evolving probability of survival following acute myocardial infarction." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393249.

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2

Fu, Xiaoqian. "Probability of Survival in a Random Exchange Economy." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/320109.

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3

Lan, Yi. "Survival Probability and Intensity Derived from Credit Default Swaps." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/82.

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This project discusses the intensity and survival probability derived from Credit Default Swaps (CDS). We utilize two models, the reduced intensity model and the Shift Square Root Diffusion (SSRD) model. In the reduced intensity model, we assume a deterministic intensity and implement a computer simulation to derive the survival probability and intensity from the CDS market quotes of the company. In the SSRD model, the interest rate and intensity are both stochastic and correlated. We discuss the impaction of correlation on the interest rate and intensity. We also conduct a Monte Carlo simulat

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4

Christiansson, Alexander. "Classication of survival data by comparison of survival functions : an application to prostate cancer registry data." Thesis, Uppsala universitet, Tillämpad matematik och statistik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-420703.

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5

Rouki, Chariklia. "Experimental studies of the synthesis and the survival probability of transactinides /." Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4690.

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6

Shao, Qiming. "Probability of Survival of an Economy Agent in a Markov Model for Investment." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/321941.

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7

潘成達 and Shing-Tat Poon. "Measuring the degree of dependence of lifetimes in some bivariate survival distributions." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1993. http://hub.hku.hk/bib/B31977443.

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8

Poon, Shing-Tat. "Measuring the degree of dependence of lifetimes in some bivariate survival distributions." [Hong Kong] : University of Hong Kong, 1993. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13787421.

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9

Grannas, David, and Edvin Volgsten. "Mediation and Interaction with Application to Survival After Myocardial Infarction." Thesis, Uppsala universitet, Statistiska institutionen, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-339939.

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Previous studies have found that the socioeconomic risk factors education, income and family type were independently associated with mortality after first myocardial infarction (MI). In this population-based cohort study we study how these socioeconomic risk factors are related to the mortality among first MI survivors within 365 days. To this end, we use the four-way decomposition analysis which decomposes the total effect of the exposure into the effect that is due to only mediation, due to only interaction, due to both mediation and interaction and due to neither mediation nor interaction.

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10

Kaponen, Martina. "Prediction of survival time of prostate cancer patients using Cox regression." Thesis, Uppsala universitet, Tillämpad matematik och statistik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-354482.

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11

Teodorescu, Iuliana. "Optimization in non-parametric survival analysis and climate change modeling." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4782.

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Many of the open problems of current interest in probability and statistics involve complicated data sets that do not satisfy the strong assumptions of being independent and identically distributed. Often, the samples are known only empirically, and making assumptions about underlying parametric distributions is not warranted by the insufficient information available. Under such circumstances, the usual Fisher or parametric Bayes approaches cannot be used to model the data or make predictions. However, this situation is quite often encountered in some of the main challenges facing statistical,

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12

Hebert, Amy Ruth Tempel. "Is the Probability of Survival for A Liver Transplant Dependent on the Patient's Choice of Hospital?" Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/36321.

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People who need a liver transplant must choose a hospital at which the transplant will be performed. The United Network for Organ Sharing (UNOS) allocates organs to patients based on patient characteristics and assumes all hospitals have equal skill. The question for a patient thus becomes, which hospital to choose? This thesis investigates whether the differences in liver transplant survival rates for hospitals are a result of differences in patients and/or differences in hospital-specific criteria.<p> The findings in this thesis show that most of the differences in hospital survival rates

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13

Ripley, Ruth Mary. "Neural network models for breast cancer prognosis." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244721.

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14

Whetten, Andrew B. "Surviving a Civil War: Expanding the Scope of Survival Analysis in Political Science." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7417.

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Survival Analysis in the context of Political Science is frequently used to study the duration of agreements, political party influence, wars, senator term lengths, etc. This paper surveys a collection of methods implemented on a modified version of the Power-Sharing Event Dataset (which documents civil war peace agreement durations in the Post-Cold War era) in order to identify the research questions that are optimally addressed by each method. A primary comparison will be made between a Cox Proportional Hazards Model using some advanced capabilities in the glmnet package, a Survival Random F

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15

Mudunuru, Venkateswara Rao. "Modeling and Survival Analysis of Breast Cancer: A Statistical, Artificial Neural Network, and Decision Tree Approach." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6120.

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Survival analysis today is widely implemented in the fields of medical and biological sciences, social sciences, econometrics, and engineering. The basic principle behind the survival analysis implies to a statistical approach designed to take into account the amount of time utilized for a study period, or the study of time between entry into observation and a subsequent event. The event of interest pertains to death and the analysis consists of following the subject until death. Events or outcomes are defined by a transition from one discrete state to another at an instantaneous moment in tim

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16

Lee, Gunhee. "Noninformative priors for some models useful in reliability and survival analysis /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9720544.

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17

Molinares, Carlos A. "Parametric and Bayesian Modeling of Reliability and Survival Analysis." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3252.

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The objective of this study is to compare Bayesian and parametric approaches to determine the best for estimating reliability in complex systems. Determining reliability is particularly important in business and medical contexts. As expected, the Bayesian method showed the best results in assessing the reliability of systems. In the first study, the Bayesian reliability function under the Higgins-Tsokos loss function using Jeffreys as its prior performs similarly as when the Bayesian reliability function is based on the squared-error loss. In addition, the Higgins-Tsokos loss function was foun

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18

Rajeev, Deepthi. "Separate and Joint Analysis of Longitudinal and Survival Data." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1775.pdf.

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19

Nyinawajambo, Marie Raissa. "Survival Analysis of Time to Event Data : An application to child mortality in Sub-Saharan Africa Region using Their Demographic and Health Surveys." Thesis, Örebro universitet, Handelshögskolan vid Örebro Universitet, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-67988.

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20

Sheldon, Emily H. "Choosing the Cut Point for a Restricted Mean in Survival Analysis, a Data Driven Method." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3121.

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Survival Analysis generally uses the median survival time as a common summary statistic. While the median possesses the desirable characteristic of being unbiased, there are times when it is not the best statistic to describe the data at hand. Royston and Parmar (2011) provide an argument that the restricted mean survival time should be the summary statistic used when the proportional hazards assumption is in doubt. Work in Restricted Means dates back to 1949 when J.O. Irwin developed a calculation for the standard error of the restricted mean using Greenwood’s formula. Since then the developm

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21

Liang, Yi. "Likelihood ratio test for the presence of cured individuals : a simulation study /." Internet access available to MUN users only, 2002. http://collections.mun.ca/u?/theses,157472.

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22

Edlund, Jessica. "Can the effect of income on survival after stroke be explained by access to secondary prevention? : A mediation analysis on data from the Swedish stroke register." Thesis, Umeå universitet, Statistik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160797.

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In Sweden, research has shown that socially underprivileged groups have poorer access to stroke care, both in the acute stage and secondary prevention after stroke, and are more likely to have adverse outcomes. The aim of this thesis is to study the causal mechanisms behind the association between low income and death after having a stroke. More specifically, to what extent is the effect of income on death mediated through treatment according to guidelines? To do this, mediation analysis have been applied to a data material from Riksstroke, the Swedish stroke register. The results of a mediati

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23

Devamitta, Perera Muditha V. "Statistical Analysis and Modeling of Ovarian and Breast Cancer." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7395.

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The objective of the present study is to investigate key aspects of ovarian and breast cancers, which are two main causes of mortality among women. Identification of the true behavior of survivorship and influential risk factors is essential in designing treatment protocols, increasing disease awareness and preventing possible causes of disease. There is a commonly held belief that African Americans have a higher risk of cancer mortality. We studied racial disparities of women diagnosed with ovarian cancer on overall and disease-free survival and found out that there is no

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24

Nåtman, Jonatan. "The performance of inverse probability of treatment weighting and propensity score matching for estimating marginal hazard ratios." Thesis, Uppsala universitet, Statistiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385502.

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Propensity score methods are increasingly being used to reduce the effect of measured confounders in observational research. In medicine, censored time-to-event data is common. Using Monte Carlo simulations, this thesis evaluates the performance of nearest neighbour matching (NNM) and inverse probability of treatment weighting (IPTW) in combination with Cox proportional hazards models for estimating marginal hazard ratios. Focus is on the performance for different sample sizes and censoring rates, aspects which have not been fully investigated in this context before. The results show that, in

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25

Bonsu, Nana Osei Mensa. "Age Dependent Analysis and Modeling of Prostate Cancer Data." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4867.

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Growth rate of prostate cancer tumor is an important aspect of understanding the natural history of prostate cancer. Using real prostate cancer data from the SEER database with tumor size as a response variable, we have clustered the cancerous tumor sizes into age groups to enhance its analytical behavior. The rate of change of the response variable as a function of age is given for each cluster. Residual analysis attests to the quality of the analytical model and the subject estimates. In addition, we have identified the probability distribution that characterize the behavior of the response

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26

Gao, Chao. "Statistical Analysis and Modeling of Stomach Cancer Data." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7400.

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The objective of this study is to address some important questions associated with stomach cancer patients using the data from the Surveillance Epidemiology and End Results (SEER) program of the United States. To better understand the behavior of stomach cancer, we first perform parametric analysis for each patient group (white male, white female, African American male, African American female, other male and female) to identify the probability distribution function which can best characterize the behavior of the malignant stomach tumor sizes. We evaluate the effects of pat

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27

Santos, Bárbara Leitão. "Practical approach for probability of default estimation under IFRS 9." Master's thesis, Instituto Superior de Economia e Gestão, 2018. http://hdl.handle.net/10400.5/17350.

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Mestrado em Mathematical Finance<br>This report is part of the conclusion of the Master degree in Mathematical Finance, as a result of a 6-month internship at EY, in Financial Services - Advisory. Due to a recent financial crisis, credit entities had to deal with uncertainty, being credit risk one of the main concerns. Risk management in this type of entities is crucial to assure financial stability, and therefore, there is always a constant need of improvement. During the financial crisis of 2008, risk management failed its man purpose since risk models reveal insufficient to capture the risk

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28

Kvederienė, Rūta. "The impact of emergency care on severe pediatric trauma outcomes." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_085948-00813.

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Trauma is the main cause of death in paediatric population worldwide. Lithuania has the highest trauma-related mortality in the European Union (EU). Lithuanian standardised injury death rate is 150.9 per 100000 inhabitants while in comparison the mean standardised injury death rate in the EU is 41.4, and the lowest one is in the Netherlands (26.4 injury death rate per 100000 inhabitants). The aim of this study was to analyze the impact of pre-hospital and in-hospital emergent trauma care on severe pediatric trauma outcomes, performing a prospective observational clinical trial in the Vilnius U

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29

Börsum, Jakob. "Estimating Causal Effects Of Relapse Treatment On The Risk For Acute Myocardial Infarction Among Patients With Diffuse Large B-Cell Lymphoma." Thesis, Uppsala universitet, Statistiska institutionen, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447241.

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This empirical register study intends to estimate average causal effects of relapse treatment on the risk for acute myocardial infarction (AMI) among patients with Diffuse B-Cell Lymphoma (DLBCL) within the potential outcome framework. The report includes a brief introduction to causal inference and survival anal- ysis and mentions specific causal parameters of interest that will be estimated. A cohort of 2887 Swedish DLBCL patients between 2007 and 2014 were included in the study where 560 patients suffered a relapse. The relapse treatment is hypothesised to be cardiotoxic and induces an incr

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30

Rodrigo, Hansapani Sarasepa. "Bayesian Artificial Neural Networks in Health and Cybersecurity." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6940.

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Being in the era of Big data, the applicability and importance of data-driven models like artificial neural network (ANN) in the modern statistics have increased substantially. In this dissertation, our main goal is to contribute to the development and the expansion of these ANN models by incorporating Bayesian learning techniques. We have demonstrated the applicability of these Bayesian ANN models in interdisciplinary research including health and cybersecurity. Breast cancer is one of the leading causes of deaths among females. Early and accurate diagnosis is a critic

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31

Donglo, Hope. "Study οf reactiοn mechanisms fοr the synthesis οf super-heavy elements". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMC243.

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Cette thèse étudie le mécanisme de synthèse des éléments super-lourds (SHE) par des réactions de fusion-évaporation. Il s'agit de noyaux de numéro atomique \(Z \ge 104\) qui n'existent pas dans la nature en raison de leurs barrières de fission macroscopiques qui disparaissent. Ils sont stabilisés par une correction quantique du modèle en couches. La recherche de nouveaux SHE repousse les limites de la physique nucléaire et nous permet de mieux comprendre leur formation, leur stabilité et leur structure. Cependant, la synthèse des SHE est un défi en raison de la diminution des sections efficace

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32

Junior, Antonio Carlos Ricardo Braga. "Distribuições das classes Kumaraswamy generalizada e exponenciada: propriedades e aplicações." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-07062013-150103/.

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Recentemente, Cordeiro e de Castro (2011) apresentaram uma classe generalizada baseada na distribuição Kumaraswamy (Kw-G). Essa classe de distribuições modela as formas de risco crescente, decrescente, unimodal e forma de U ou de banheira. Uma importante distribuição pertencente a essa classe é a distribuição Kumaraswamy Weibull modificada (KwMW) proposta por Cordeiro; Ortega e Silva (2013). Com isso foi utilizada essa distribuição para o desenvolvimento de algumas novas propriedades e análise bayesiana. Além disso, foi desenvolvida uma nova distribuição de probabilidade a partir da distribuiç

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33

Kvederienė, Rūta. "Vaikų sunkių traumų skubiosios pagalbos veiksnių įtaka traumų išeitims." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121227_090007-24041.

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Traumos yra pagrindinė vaikų, paauglių ir jaunų suaugusiųjų mirties priežastis. Stebimas didžiulis skirtumas Europos Sąjungos (ES) šalyse lyginant mirštamumą nuo traumų. Lietuvoje didžiausias ES standartizuotas traumų mirčių dažnis (150.9 mirtys dėl traumų 100.000 gyventojų). Palyginimui: ES šalių vidurkis yra 41.4 mirtys dėl traumos 100.000 gyventojų, mažiausias standartizuotas traumų mirčių dažnis yra Olandijoje – 26.4 mirtys 100.000 gyventojų. Toks skirtumas nurodo potencialią galimybę sumažinti mirčių dėl traumų skaičių, naudojant visas priemones: tiek traumų prevenciją, tiek skubios pagal

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34

Pousette, Marcus, and Jim Domeij. "Estimation of early termination of financial derivatives." Thesis, KTH, Matematisk statistik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-252568.

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In terms of pricing financial derivatives, contractual length plays a important role in pricing risk. A contract with long duration will have more associated risk in comparison with a contract with low duration, everything else equal. In this thesis work we examine whether information about the derivative contract and involved parties (the counterparty) could be used in a model to accurately predict both probability and time if the contract would terminate earlier than the predetermined contractual length. By modelling the termination time with deep neural networks and assuming the probability

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35

Chan, Yiu Ming. "Statistical Analysis and Modeling of Prostate Cancer." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4806.

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The objective of the present study is to address some important questions related to prostate cancer treatments and survivorship among White and African American men. It is commonly understood that the risk of developing prostate cancer is higher in African American men than the other races. However, using parametric analysis, this study demonstrates that this perception is a "myth" not a "reality". The study further identifies the existence of racial/ethnic disparities by comparing the average mean tumor size, the median of survival time, and the survival function between White and African A

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36

Pramukkul, Pensri. "Temporal Complexity and Stochastic Central Limit Theorem." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc700093/.

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Complex processes whose evolution in time rests on the occurrence of a large and random number of intermittent events are the systems under study. The mean time distance between two consecutive events is infinite, thereby violating the ergodic condition and activating at the same time a stochastic central limit theorem that explains why the Mittag-Leffler function is a universal property of nature. The time evolution of these complex systems is properly generated by means of fractional differential equations, thus leading to the interpretation of fractional trajectories as the average over man

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37

Brockett, Russell. "How Other Drivers’ Vehicle Characteristics Influence Your Driving Speed." Scholarship @ Claremont, 2011. http://scholarship.claremont.edu/cmc_theses/131.

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An analysis of the effect of passing vehicles’ characteristics and their impact on other drivers’ velocities was investigated. Three experimental studies were proposed and likely outcomes were discussed. Experiment 1 focused on the effect of passing vehicle type (SUV, sedan or truck) on driver speed. Drivers were hypothesized as going faster when the same vehicle type as they were driving passed them versus when no vehicle or a different vehicle passed them. Experiment 2 focused on the effect of passing SUV age on driver’s speed. Evidence suggests passing older SUVs will increase the driv

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38

Tsai, Rodrigo 1974. "Aplicações de cópulas em modelos de riscos múltiplos dependentes e em modelos de misturas de distribuições." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/305843.

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Orientador: Luiz Koodi Hotta<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica<br>Made available in DSpace on 2018-08-21T13:55:30Z (GMT). No. of bitstreams: 1 Tsai_Rodrigo_D.pdf: 3859687 bytes, checksum: 1064b1fa05b98307d97763bb79e95de4 (MD5) Previous issue date: 2012<br>Resumo: Nesse trabalho discutimos aplicações de cópulas a modelos de riscos múltiplos com dependência e modelos de misturas de distribuições. Numa primeira parte analisamos a inclusão de dependência entre os fatores de risco do modelo de riscos múltiplos. Os

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Jinnah, Ali. "Inference for Cox's regression model via a new version of empirical likelihood." unrestricted, 2007. http://etd.gsu.edu/theses/available/etd-11272007-223933/.

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Thesis (M.S.)--Georgia State University, 2007.<br>Title from file title page. Yichuan Zhao, committee chair; Yu-Sheng Hsu , Xu Zhang, Yuanhui Xiao , committee members. Electronic text (54 p.) : digital, PDF file. Description based on contents viewed Feb. 25, 2008. Includes bibliographical references (p. 30-32).

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Santana, Tiago Viana Flor de. "As distribuições Kumaraswamy-log-logística e Kumaraswamy-logística." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-29112010-093844/.

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Neste trabalho apresenta-se duas novas distribuições de probabilidade obtidas de dois métodos de generalização da distribuição log-logística com dois parâmetros (LL(?,?)). O primeiro método descrito em Marshall e Olkin (1997) transforma a nova distribuição, agora com três parâmetros e denominada distribuição log-logística modificada (LLM (v,?,?)), mais flexível porém, não muda a forma geral da função de taxa de falha e o novo parâmetro v, não influência no cálculo da assimetria e curtose. O segundo método utiliza a classe de distribuições Kumaraswamy proposta por Cordeiro e Castro (2010), para

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Ellis, Kristen Sue. "Habitat Selection and Nesting Ecology of Snowy Plover in the Great Basin." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3868.

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Snowy plovers (Charadrius nivosus) are small, ground-nesting shorebirds that are a species of conservation concern throughout North America. Despite increased efforts to understand factors contributing to the decline of snowy plover, little is known about habitat selection and breeding ecology of snowy plover for the large population found in the Great Basin. We tested hypotheses concerning the occupancy and nesting success of snowy plover. First, we identified factors influencing snowy plover nest survival at Great Salt Lake, Utah. We hypothesized that snowy plover would demonstrate differenc

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42

Choi, Bong-Jin. "Statistical Analysis, Modeling, and Algorithms for Pharmaceutical and Cancer Systems." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5200.

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The aim of the present study is to develop a statistical algorithm and model associ- ated with breast and lung cancer patients. In this study, we developed several statistical softwares, R packages, and models using our new statistical approach. In the present study, we used the five parameters logistic model for determining the optimal doses of a pharmaceutical drugs, including dynamic initial points, an automatic process for outlier detection and an algorithm that develops a graphic user interface(GUI) program. The developed statistical procedure assists medical scientists by reducing their

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43

Pham, Thi Da Cam. "Théorèmes limite pour un processus de Galton-Watson multi-type en environnement aléatoire indépendant." Thesis, Tours, 2018. http://www.theses.fr/2018TOUR4005/document.

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La théorie des processus de branchement multi-type en environnement i.i.d. est considérablement moins développée que dans le cas univarié, et les questions fondamentales ne sont pas résolues en totalité à ce jour. Les réponses exigent une compréhension profonde du comportement des produits des matrices i.i.d. à coefficients positifs. Sous des hypothèses assez générales et lorsque les fonctions génératrices de probabilité des lois de reproduction sont “linéaire fractionnaires”, nous montrons que la probabilité de survie à l’instant n du processus de branchement multi-type en environnement aléat

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44

Pascoa, Marcelino Alves Rosa de. "Extensões da distribuição gama generalizada: propriedades e aplicações." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-30052012-091940/.

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A distribuição gama generalizada (GG) possui, como casos particulares, distribuição Weibull, log-normal, gama, qui-quadrado, entre outras. Por essa razão, ela e considerada uma distribuição exvel no ajuste dos dados. A ideia de Cordeiro e Castro (2011) foi utilizada para o desenvolvimento de duas novas distribuições de probabilidade a partir da distribuição GG. Uma delas e denominada de Kumaraswamy gama generalizada (KumGG) e possui cinco parâmetros; a outra distribuição e uma modificação de um dos parmetros de forma da distribuição KumGG e foi denominada de distribuição Kumaraswamy gama gener

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45

BARROS, Kleber Napoleão Nunes de Oliveira. "Classe de distribuições de Marshall-Olkin generalizada exponenciada." Universidade Federal Rural de Pernambuco, 2014. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5020.

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Submitted by (ana.araujo@ufrpe.br) on 2016-07-07T16:42:12Z No. of bitstreams: 1 Kleber Napoleao Nunes de Oliveira Barros.pdf: 1733769 bytes, checksum: 3f25ee9412d02841f417127da8b2b257 (MD5)<br>Made available in DSpace on 2016-07-07T16:42:13Z (GMT). No. of bitstreams: 1 Kleber Napoleao Nunes de Oliveira Barros.pdf: 1733769 bytes, checksum: 3f25ee9412d02841f417127da8b2b257 (MD5) Previous issue date: 2014-12-19<br>This work generalizes the family of Marshall-Olkin distributions by adding parameters, making it a new more exible class, creating the new Generalized Exponentialized Marshall-O

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Gregório, Joana Catalina Mendes Moreira Saúde. "Life annuities and ruin." Master's thesis, Instituto Superior de Economia e Gestão, 2015. http://hdl.handle.net/10400.5/9273.

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Mestrado em Ciências Actuariais<br>Este trabalho pretende combinar dois grandes tópicos num contexto atuarial: rendas contingentes sobre a vida humana e teoria da ruína, de forma a determinar a probabilidade de ruína financeira para carteiras de anuidades-vida. Duas principais perspetivas podem ser consideradas nesta situação: a dos indivíduos e a das seguradoras de vida, com aplicação de diferentes modelos. Limitações de tempo disponível e extensão do texto conduziram a que apenas a perspetiva das empresas fosse objeto de estudo, aplicando-se o modelo de risco individual clássico. Após um

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Hua, Dan. "Propagation and monitoring of freshwater mussels released into the Clinch and Powell rivers, Virginia and Tennessee." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51755.

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Freshwater mussels (Unionidae) in the United States have experienced dramatic declines, and 25% species are listed as federally endangered. Hence, recovery plans for endangered species proposed a strategy of propagation of young mussels for release to natal rivers to augment declining populations. In this study, I conducted laboratory experiments, assessed site suitability for mussel restoration, and evaluated survival and growth rates of released mussels to meet the requirements of recovery plan. I conducted multiple experiments to develop an improved protocol for juvenile mussel propagatio

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Alexander, Laura. "Comparative Biology of Three Species of Costa Rican Haeterini." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1843.

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Documenting life history characteristics of populations, especially of herbivorous insects such as butterflies, is fundamental to the ecological study of tropical rainforests. However, we know relatively little about tropical forest butterflies. Here, I combine information gathered using the mark-release-recapture (MRR) approach with manipulative and observational experiments in a natural environment to explore aspects of the population biology of three closely-related species of Costa Rican fruit-feeding understory butterflies (Cithaerias pireta, Dulcedo polita, and Pierella helvina), specifi

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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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Anar, Hatice. "Credit Risk Modeling And Credit Default Swap Pricing Under Variance Gamma Process." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609840/index.pdf.

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In this thesis, the structural model in credit risk and the credit derivatives is studied under both Black-Scholes setting and Variance Gamma (VG) setting. Using a Variance Gamma process, the distribution of the firm value process becomes asymmetric and leptokurtic. Also, the jump structure of VG processes allows random default times of the reference entities. Among structural models, the most emphasis is made on the Black-Cox model by building a relation between the survival probabilities of the Black-Cox model and the value of a binary down and out barrier option. The survival probabilities

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