Institution
City University London
Education•London, United Kingdom•
About: City University London is a education organization based out in London, United Kingdom. It is known for research contribution in the topics: Population & Context (language use). The organization has 5735 authors who have published 17285 publications receiving 453290 citations.
Papers published on a yearly basis
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TL;DR: In this paper, a semi-nonparametric extreme value approach is proposed for determining the value at risk of three LIFFE futures contracts. But the results indicate that for a hold-out sample, the proposed semi-parametric approach yields superior results to other methods, but the small sample tail index technique is also accurate.
Abstract: This paper compares a number of different extreme value models for determining the value at risk of three LIFFE futures contracts. A semi-nonparametric approach is also proposed where the tail events are modeled using the Generalised Pareto Distribution and normal market conditions are captured by the empirical distribution function. The value at risk estimates from this approach are compared with those of standard nonparametric extreme value tail estimation approaches, with a small sample bias-corrected extreme value approach, and with those calculated from bootstrapping the unconditional density and bootstrapping from a GARCH(1,1) model. The results indicate that for a hold-out sample, the proposed semi-nonparametric extreme value approach yields superior results to other methods, but the small sample tail index technique is also accurate.
110 citations
TL;DR: In this article, analytical expressions for the coupled bending-torsional dynamic stiffness matrix elements of a uniform Timoshenko beam element are derived in an exact sense by solving the governing differential equations of motion of the element.
110 citations
TL;DR: This work identified valuable data about the context in which such initiatives are implemented and the type of factors that might impinge on implementation, which has implications in three areas: researchers with an interest in evidence-based public health could be encouraged to consider implementation issues in the design of intervention studies.
110 citations
TL;DR: This study illustrates how population-based cardiac and aortic imaging phenotypes can be used to better define cardiovascular disease risks as well as heart–brain health interactions, highlighting new opportunities for studying disease mechanisms and developing image-based biomarkers.
Abstract: Differences in cardiac and aortic structure and function are associated with cardiovascular diseases and a wide range of other types of disease. Here we analyzed cardiovascular magnetic resonance images from a population-based study, the UK Biobank, using an automated machine-learning-based analysis pipeline. We report a comprehensive range of structural and functional phenotypes for the heart and aorta across 26,893 participants, and explore how these phenotypes vary according to sex, age and major cardiovascular risk factors. We extended this analysis with a phenome-wide association study, in which we tested for correlations of a wide range of non-imaging phenotypes of the participants with imaging phenotypes. We further explored the associations of imaging phenotypes with early-life factors, mental health and cognitive function using both observational analysis and Mendelian randomization. Our study illustrates how population-based cardiac and aortic imaging phenotypes can be used to better define cardiovascular disease risks as well as heart-brain health interactions, highlighting new opportunities for studying disease mechanisms and developing image-based biomarkers.
109 citations
TL;DR: Efforts to increase adherence to immunosuppression medication after transplantation should be implemented by targeting necessity beliefs, monitoring depression, and promoting strategies to decrease forgetfulness.
Abstract: Background
Although adherence to immunosupressive medication after transplantation is important to maximize good clinical outcomes it remains suboptimal and not well-understood. The purpose of this study was to examine intentional and unintentional non-adherence to immunosuppression medication in kidney transplant patients.
109 citations
Authors
Showing all 5822 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Andrew M. Jones | 103 | 764 | 37253 |
| F. Rauscher | 100 | 605 | 36066 |
| Thorsten Beck | 99 | 373 | 62708 |
| Richard J. K. Taylor | 91 | 1543 | 43893 |
| Christopher N. Bowman | 90 | 639 | 38457 |
| G. David Batty | 88 | 451 | 23826 |
| Xin Zhang | 87 | 1714 | 40102 |
| Richard J. Cook | 84 | 571 | 28943 |
| Hugh Willmott | 82 | 310 | 26758 |
| Scott Reeves | 82 | 441 | 27470 |
| Sarah-Jayne Blakemore | 81 | 211 | 29660 |
| Mats Alvesson | 78 | 267 | 38248 |
| W. John Edmunds | 75 | 252 | 24018 |
| Sheng Chen | 71 | 688 | 27847 |
| Christopher J. Taylor | 71 | 415 | 30948 |