Results 71 to 80 of about 35,832,141 (372)

A Model-Independent Characterisation of Strong Gravitational Lensing by Observables

open access: yesUniverse, 2019
When light from a distant source object, like a galaxy or a supernova, travels towards us, it is deflected by massive objects that lie in its path. When the mass density of the deflecting object exceeds a certain threshold, multiple, highly distorted ...
Jenny Wagner
doaj   +1 more source

Frequency and management of emergencies in primary care offices: A cross-sectional study in northwestern Germany

open access: yesEuropean Journal of General Practice, 2022
Background Little literature exists on emergencies within primary care offices.Objectives We aimed to study the occurrence of emergencies and confidence in dealing with them among primary care physicians (PCPs) in Germany.Methods We conducted a cross ...
Max Melzel   +3 more
doaj   +1 more source

A stepwise emergence of evolution in the RNA world

open access: yesFEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source

Semi-Annual Report to Congress for the Period of October 1, 2002 to March 31, 2003 [PDF]

open access: yes, 2001
[Excerpt] It is a privilege to transmit this Semiannual Report to the Congress covering the period October 1, 2002, through March 31, 2003, summarizing the significant audit and investigative activities of the Office of Inspector General (OIG), U.S ...
Office of the Inspector General
core   +7 more sources

Heterotic compactifications with principal bundles for general groups and general levels [PDF]

open access: yes, 2007
We examine to what extent heterotic string worldsheets can describe arbitrary E8xE8 gauge fields. The traditional construction of heterotic strings builds each E8 via a Spin(16)/Z2 subgroup, typically realized as a current algebra by left-moving fermions,
Distler, J., Sharpe, E.
core   +4 more sources

GENERAL PRINCIPLES OF LAW [PDF]

open access: yesChallenges of the Knowledge Society, 2016
According to Professor Djuvara “law can be a science, and legal knowledge can also become science when, referring to a number as large as possible of acts of those covered by law, sorts and connects them by their essential characters upon legal concepts ...
Elena ANGHEL
doaj  

COVID‐19 pandemic and the effect of increased utilisation of mobile X‐ray examinations on radiation dose to radiographers

open access: yesJournal of Medical Radiation Sciences, 2022
Introduction The use of ionising radiation results in occupational exposure to medical imaging professionals, requiring routine monitoring. This study aims to assess the effect of increased utilisation of mobile X‐ray units, mobile imaging of non‐routine
Phoebe Yeung   +4 more
doaj   +1 more source

A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX [PDF]

open access: yes, 2010
In this work we illustrate the POWHEG BOX, a general computer code framework for implementing NLO calculations in shower Monte Carlo programs according to the POWHEG method.
S. Alioli, P. Nason, C. Oleari, E. Re
semanticscholar   +1 more source

On generalizing generalized polygons [PDF]

open access: yesInnovations in Incidence Geometry: Algebraic, Topological and Combinatorial, 2009
The purpose of this paper is to reveal in geometric terms a decade-old construction of certain families of graphs with nice extremal properties. Construction of the graphs in question is motivated by the way in which regular generalized polygons may be embedded in their Lie algebras, so that point-line incidence corresponds to the vanishing Lie product.
openaire   +3 more sources

On a generalization of the Rogers generating function [PDF]

open access: yesJournal of Mathematical Analysis and Applications, 2019
arXiv admin note: text overlap with arXiv:1411 ...
Howard S. Cohl   +2 more
openaire   +4 more sources

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