Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 34 for “"Age effect"”.
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Selfish Mutations: the Genetic Basis of the Paternal Age Effect
<p>As the mean age of childrearing grows, the effect of parental age on genetic disease and child health becomes ever more important. A number of autosomal dominant disorders show a dramatic paternal age effect due to selfish mutations: substitutions that grant spermatogonial stem cells (SSCs) a …
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Age effect on presence, susceptibility and treatment of erosive tooth wear
… aiming to investigate the impact of tooth age on ETW susceptibility and prevention. In the first study, un-identified extracted premolars were collected and had their ages estimated using validated dental forensic methods. The premolars were examined to investigate the relationship between …
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Canaries in the Coalmine: An investigation of the relative age effect within further education
… educational challenges due to their relative age within their year cohort. This study reports on a mixed methods research project, undertaken through a critical realist lens, in which I investigated quantitative patterns of enrolment in a large further education college and subsequently …
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Does the Relative Age Effect Exist in Elite Sport? An Analysis of Olympic Competition
… eligibility cut-off for a program's particular age group. This is referred to as the relative age effect (RAE) and has been identified in many youth sports. However, it is not known if the RAE carries over into elite, adult competition. The purpose of this study was to determine if the RAE …
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Anthropometric characteristics, physical attributes, and relative age effect of elite youth soccer players: comparison between Iceland and Norway
… well as developing training plans and seeing its effect. Objectives: To analyse and compare anthropometric characteristics, physical fitness attributes, and relative age effect of elite youth players in Iceland and Norway. Method: 46 players from the Icelandic male youth national teams and 26 …
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Validity and reliability of a unique aerobic field test for estimating VO 2 max among basketball players and the differences by gender, ages and relative age effect
… players on an elite youth league in Israel, aged 16.4 years on average. In addition to participating in the proposed test (Yo-Yo Recovery Test for Basketball Players) twice (test/re-test), the players also performed three previously validated tests (Bruce Protocol Stress Test, Yo-Yo …
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STUDIES IN OOCYTES FROM THREE MAMMALIAN SPECIES DEMONSTRATE THAT MEIOTIC KINETOCHORES ARE COMPOSED OF PREVIOUSLY UNIDENTIFIED SUBDOMAINS AND REVEAL TWO NOVEL MECHANISMS BEHIND THE MATERNAL-AGE EFFECT IN HUMANS
… increases strikingly with advancing maternal age. Why egg quality declines dramatically as women approach their forties remains one of the outstanding questions in developmental biology. This PhD thesis demonstrates how unforeseen features of kinetochore organization that are unique to meiosis …
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Are players born earlier in the calendar year more likely to experience elite dropout?
The relative age effect (RAE) has been consistently documented among elite football players at youth level but has been shown to dissipate at senior level. This research explores whether players born earlier in the calendar year, initially selected to play at an elite level, are more likely to be …
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Essays on the Economics of Education and Gender
… in early childhood. Chapter 1 examines the effect of elementary school teachers' beliefs about gender roles on student achievement. We exploit a natural experiment where teachers are assigned randomly to schools and students are allocated to teachers randomly. We show that girls who are …
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ONTARIO ICE-HOCKEY PARTICIPATION FOR MALE YOUTH BETWEEN THE AGES OF 10 AND 15 YEARS: AN EXAMINATION OF THE RELATIONSHIP BETWEEN RELATIVE AGE AND DROPOUT RATES
… detract from positive development. The relative age effect (RAE) suggests that athletes born in the first two quartiles of a given selection year experience a selection advantage and therefore a greater opportunity for success. The purpose of the present study was to examine the relationship …
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An investigation of talent identification processes in the youth academies of professional soccer clubs for male foundation phase players (5-11 years old)
… in detail, in particular within the youngest ages (5-11 years old). Our aim was to survey practitioners working within professional soccer academies that support with the identification of players between 5-11 years old, with 19 practitioners responding to the survey. Results highlighted that …
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Preventing aneuploidy and the consequences of failure
… in humans and are responsible for the 'maternal age effect.' This thesis addresses both the causes and consequences of aneuploidy. We first investigate the mechanisms that ensure faithful segregation of chromosomes during meiosis in the budding yeast Saccharomyces cerevisiae. The conserved Aurora …
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Temporal and Aerodynamic Aspects of Velopharyngeal Coarticulation: Effects of Age, Gender and Vowel Height
… objective of this study was to determine the effects of age, gender and vowel height on the temporal and aerodynamic aspects of nasal airflow segments related to velar coarticulation in the normal speech of children and adults. A secondary objective was to determine the within speaker …
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Adolescent property offending and socialisation
… offending has been coincidence of the peak age of such offences with the last year of compulsory schooling. This fact is taken as the focus of three epidemiological analyses. These were: 1. A survey of child welfare records of adolescent property offences for Hamilton, N.Z., in 1971. 2. The …
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Vocational interest development from adolescence to adulthood: a meta-analysis on mean-level change
… and psychology. Despite their widespread usage, it is not known whether vocational interests undergo mean-level changes with age. If interests do change, in what direction? And do changes vary across age, kinds of interests, and gender? In the current meta-analysis, we aggregate effect sizes …
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Selection biases within an English football academy: implications of the Elite Player Performance Plan
… Previous literature demonstrates that relative age and biological maturation are responsible for selection biases within youth football, where both factors exert an influence on anthropometry and physical performances. However, there is limited research that has examined the aforementioned …
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On modelling volatility and mortality for pension schemes
… models that could be used in asset liability management in pension schemes. This study provides a comprehensive study of various advance multivariate DCC GARCH models which are used for construction of optimal portfolios in modelling asset return covariances. The effectiveness of using parametric …
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An analysis of industrial company failure in the UK and Russia for the 1990s
… rate, and also by controlling for the firm's age effect. We find that cross sectional models, conditioned on changes in overall economic conditions, dominate simpler models, utilising financial inputs alone, for comparisons of ex ante, out-of sample classificatory accuracy. Thus, the UK data …
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Effects of Multi-Modal Warning Systems on Elderly Drivers'Perceived Urgency and Comfort
… of the study was to investigate multi-modality effects (visual and auditory) on the perception of urgency in elderly individuals addressing issues of safety and comfort. Twenty individuals (10 young, 10 elderly) from Montgomery County of Virginia participated in the laboratory study. In the …
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