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Institution

Imperial College London

EducationLondon, Westminster, United Kingdom
About: Imperial College London is a(n) education organization based out in London, Westminster, United Kingdom. It is known for research contribution in the topic(s): Population & Turbulence. The organization has 90019 authors who have published 209164 publication(s) receiving 9337534 citation(s). The organization is also known as: Imperial College of Science, Technology and Medicine & Imperial College.

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Topics: Population, Turbulence, Laser ...read more
Authors

Showing all 90019 results

NameH-indexPapersCitations
Albert Hofman2672530321405
David Miller2032573204840
Tamara B. Harris2011143163979
Mark I. McCarthy2001028187898
Peter J. Barnes1941530166618
Simon D. M. White189795231645
Patrick W. Serruys1862427173210
John Hardy1771178171694
Simon Baron-Cohen172773118071
Richard H. Friend1691182140032
Yang Gao1682047146301
Hongfang Liu1662356156290
Philippe Froguel166820118816
Salvador Moncada164495138030
Dennis R. Burton16468390959
Papers
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Book ChapterDOI: 10.1007/978-1-4612-4380-9_37
David Cox1Institutions (1)
Abstract: The analysis of censored failure times is considered. It is assumed that on each individual arc available values of one or more explanatory variables. The hazard function (age-specific failure rate) is taken to be a function of the explanatory variables and unknown regression coefficients multiplied by an arbitrary and unknown function of time. A conditional likelihood is obtained, leading to inferences about the unknown regression coefficients. Some generalizations are outlined.

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Topics: Regression analysis (61%), Linear regression (61%), Accelerated failure time model (55%) ...read more

28,225 Citations


Open accessBook
Peter McCullagh1, John A. NelderInstitutions (1)
01 Jan 1983-
Abstract: The technique of iterative weighted linear regression can be used to obtain maximum likelihood estimates of the parameters with observations distributed according to some exponential family and systematic effects that can be made linear by a suitable transformation. A generalization of the analysis of variance is given for these models using log- likelihoods. These generalized linear models are illustrated by examples relating to four distributions; the Normal, Binomial (probit analysis, etc.), Poisson (contingency tables) and gamma (variance components).

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Topics: Generalized linear model (67%), Generalized linear mixed model (66%), Quasi-likelihood (65%) ...read more

23,204 Citations


Open accessJournal ArticleDOI: 10.1164/RCCM.201204-0596PP
Jørgen Vestbo1, Suzanne S. Hurd, Alvar Agusti2, Paul W. Jones3  +9 moreInstitutions (10)
Abstract: Chronic obstructive pulmonary disease (COPD) remains a major public health problem. It is the fourth leading cause of chronic morbidity and mortality in the United States, and is projected to rank fifth in 2020 in burden of disease worldwide, according to a study published by the World Bank/World Health Organization. Yet, COPD remains relatively unknown or ignored by the public as well as public health and government officials. In 1998, in an effort to bring more attention to COPD, its management, and its prevention, a committed group of scientists encouraged the U.S. National Heart, Lung, and Blood Institute and the World Health Organization to form the Global Initiative for Chronic Obstructive Lung Disease (GOLD). Among the important objectives of GOLD are to increase awareness of COPD and to help the millions of people who suffer from this disease and die prematurely of it or its complications. The first step in the GOLD program was to prepare a consensus report, Global Strategy for the Diagnosis, Management, and Prevention of COPD, published in 2001. The present, newly revised document follows the same format as the original consensus report, but has been updated to reflect the many publications on COPD that have appeared. GOLD national leaders, a network of international experts, have initiated investigations of the causes and prevalence of COPD in their countries, and developed innovative approaches for the dissemination and implementation of COPD management guidelines. We appreciate the enormous amount of work the GOLD national leaders have done on behalf of their patients with COPD. Despite the achievements in the 5 years since the GOLD report was originally published, considerable additional work is ahead of us if we are to control this major public health problem. The GOLD initiative will continue to bring COPD to the attention of governments, public health officials, health care workers, and the general public, but a concerted effort by all involved in health care will be necessary.

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Topics: Global health (58%), Health care (57%), Public health (57%) ...read more

16,210 Citations


Open accessJournal ArticleDOI: 10.1016/S0168-9002(03)01368-8
S. Agostinelli1, John Allison2, K. Amako3, J. Apostolakis4  +123 moreInstitutions (34)
Abstract: G eant 4 is a toolkit for simulating the passage of particles through matter. It includes a complete range of functionality including tracking, geometry, physics models and hits. The physics processes offered cover a comprehensive range, including electromagnetic, hadronic and optical processes, a large set of long-lived particles, materials and elements, over a wide energy range starting, in some cases, from 250 eV and extending in others to the TeV energy range. It has been designed and constructed to expose the physics models utilised, to handle complex geometries, and to enable its easy adaptation for optimal use in different sets of applications. The toolkit is the result of a worldwide collaboration of physicists and software engineers. It has been created exploiting software engineering and object-oriented technology and implemented in the C++ programming language. It has been used in applications in particle physics, nuclear physics, accelerator design, space engineering and medical physics.

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  • Fig. 9. Isotope production cross-sections for neutron induced production of important isotopes as simulated using the isotopeproduction code in Geant4. Large points are simulation results, small points are evaluated data from the MENDL2 data library.
    Fig. 9. Isotope production cross-sections for neutron induced production of important isotopes as simulated using the isotopeproduction code in Geant4. Large points are simulation results, small points are evaluated data from the MENDL2 data library.
  • Fig. 4. Smart Voxels. A mother volume with divisions along the horizontal axis. Each one of these slices has an independent set of vertical divisions (voxels). Here, the first one from the left is shown.
    Fig. 4. Smart Voxels. A mother volume with divisions along the horizontal axis. Each one of these slices has an independent set of vertical divisions (voxels). Here, the first one from the left is shown.
  • Fig. 5. Multiple scattering of 6:56 MeV protons by 92:6 mm of silicon: the angular distribution of exiting protons. Comparison of Geant4, GEANT3 and data from [55]: G3 and G4 results are nearly identical, except at small angle.
    Fig. 5. Multiple scattering of 6:56 MeV protons by 92:6 mm of silicon: the angular distribution of exiting protons. Comparison of Geant4, GEANT3 and data from [55]: G3 and G4 results are nearly identical, except at small angle.
  • Fig. 6. Radial shower profile of E0 ¼ 1 GeV pencil electron beam in a cylinder of water, length 10 radiation lengths, radius 0.7 radiation lengths. The radial profile is the relative energy deposited per radiation length of radius. The cumulative profile is the energy deposited within a cylinder of given radius (the binning is 0.1 radiation lengths). Comparisons of Geant4, GEANT3 and measurements are from [56]. G3 and G4 results are nearly identical.
    Fig. 6. Radial shower profile of E0 ¼ 1 GeV pencil electron beam in a cylinder of water, length 10 radiation lengths, radius 0.7 radiation lengths. The radial profile is the relative energy deposited per radiation length of radius. The cumulative profile is the energy deposited within a cylinder of given radius (the binning is 0.1 radiation lengths). Comparisons of Geant4, GEANT3 and measurements are from [56]. G3 and G4 results are nearly identical.
  • Fig. 1. The Top Level Category Diagram of the Geant4 toolkit. The open circle on the joining lines represents a using relationship; the category at the circle end uses the adjoined category.
    Fig. 1. The Top Level Category Diagram of the Geant4 toolkit. The open circle on the joining lines represents a using relationship; the category at the circle end uses the adjoined category.
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Topics: Applied physics (54%)

16,046 Citations


Journal ArticleDOI: 10.1021/CR1003248
Tom Welton1Institutions (1)
07 Jul 1999-Chemical Reviews
Topics: Ionic liquid (64%), C4mim (59%), Magnetic ionic liquid (56%) ...read more

11,703 Citations


Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2022233
202112,858
202012,466
201911,096
201810,236
201710,339

Top Attributes

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Institution's top 5 most impactful journals

Nature

2.2K papers, 290.5K citations

bioRxiv

1.9K papers, 7.5K citations

Physical Review Letters

1.5K papers, 150.8K citations

Social Science Research Network

1.5K papers, 51K citations

PLOS ONE

1.4K papers, 60.8K citations

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