Results 31 to 40 of about 838,704 (270)

Energy in Fourth-Order Gravity

Annales Henri Poincaré
5 figures Update on the 17/07/22: correcting typos, streamlining the paper, taking into account/answering interesting questions asked to the authors during conferences Update on the 23/01/2024 : correction of typos, modifications suggested by reviewers for ...
R. Avalos, J. H. Lira, N. Marque
openaire   +3 more sources

A fourth‐order incremental ADC in three‐step

The Journal of Engineering, 2021
This letter presents a second‐order incremental ADC (IADC) operated in three steps, which extends the performance of a second‐order IADC close to that of a fourth‐order IADC with only two amplifiers.
Jia‐Sheng Huang, Shih‐Che Kuo, Chia‐Wei Kao, Yu‐Cheng Huang, Che‐Wei Hsu, Chia‐Hung Chen   +5 more
doaj   +1 more source

Fourth-order dispersion mediated modulation instability in dispersion oscillating fibers [PDF]

, 2013
We investigate the role played by fourth-order dispersion on the modulation instability process in dispersion oscillating fibers. It not only leads to the appearance of instability sidebands in the normal dispersion regime (as in uniform fibers), but ...
Armaroli, Andrea, Biancalana, Fabio, Bouwmans, Geraud, Droques, Maxime, Kudlinski, Alexandre, Martinelli, Gilbert, Mussot, Arnaud   +6 more
core   +1 more source

Envelope instability and the fourth order resonance

Physical Review Special Topics. Accelerators and Beams, 2014
The well-known envelope instability or the second order even collective mode [I. Hofmann, Phys. Rev. E 57, 4 (1998)] and the fourth order resonance 4σ=360° due to the nonlinear space charge effect in high intensity beams have been studied previously.
Chao Li, Ya Liang Zhao
doaj   +1 more source

Two positive solutions for nonlinear fourth-order elastic beam equations

Electronic Journal of Qualitative Theory of Differential Equations, 2019
The aim of this paper is to study the existence of at least two non-trivial solutions to a boundary value problem for fourth-order elastic beam equations given by \begin{align*} u^{(4)}+Au''+Bu = \lambda f(x,u) \quad \text{in } [0,1],\\ u(0) =u(1)
Giuseppina D'Aguì, Beatrice Di Bella, Patrick Winkert   +2 more
doaj   +1 more source

A two - grid, fourth order method for nonlinear fourth order boundary value problems [PDF]

, 1985
A fourth order convergent finite difference method is developed for the numerical solution of the nonlinear fourth order boundary value problem y(iv)(x) = f(x,y ...
Twizell, E H
core  

Survival for Children Diagnosed With Wilms Tumour (2012–2022) Registered in the UK and Ireland Improving Population Outcomes for Renal Tumours of Childhood (IMPORT) Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background The Improving Population Outcomes for Renal Tumours of childhood (IMPORT) is a prospective clinical observational study capturing detailed demographic and outcome data on children and young people diagnosed with renal tumours in the United Kingdom and the Republic of Ireland.
Naomi Ssenyonga, Angela Lopez‐Cortes, Reem Al‐Saadi, Suzanne Tugnait, Kristina Dzhuma, Catriona Duncan, Gordan Vujanic, Tanzina Chowdhury, Claudia Allemani, Michel P. Coleman, Kathy Pritchard‐Jones, the Children's Cancer and Leukaemia Group (CCLG) Renal Tumour Special Interest Group, Hugh Bishop, Anthony McCarthy, Pamela Kearns, Helen Rees, Amos Burke, Meriel Jenney, Jane Pears, Hamish Wallace, Milind Ronghe, Tanzina Chowdhury, Susan Picton, Emma Ross, Lisa Howell, Bernadette Brennan, Gail Halliday, Richard Grundy, Shaun Wilson, Sucheta Vaidya, Daniel Yeomanson, Jessica Bate, Vesna Pavasovic, Jessica Bate, Sabine Irtan, Jesper Brok, Minou Oostveen, Kristina Dzhuma, Mark Weeks, Richard Williams, Mark Powis, Max Pachl, Bruce Okoye, Naima Smeulders, Gordan Vujanic, Oystein Olsen, Tom Watson, Susan Shelmerdine, Dan Saunders, Angela Lopez-Cortes, Taryn Treger, Tom Jackson, Suzanne Tugnait, Lisa Howell, Tanzina Chowdhury, Sam Behjati, Angela Polanco   +56 more
wiley   +1 more source

Isoperimetric inequalities of the fourth order Neumann eigenvalues

Journal of Inequalities and Applications, 2020
In this paper, we obtain some isoperimetric inequalities for the first ( n − 1 ) $(n-1)$ eigenvalues of the fourth order Neumann Laplacian on bounded domains in an n-dimensional Euclidean space. Our result supports strongly the conjecture of Chasman.
Yanlin Deng, Feng Du
doaj   +1 more source

Fourth-order flows in surface modelling [PDF]

, 2013
This short article is a brief account of the usage of fourth-order curvature flow in surface ...
Kang, Ty
core  

Weak Gravitational Lensing in Fourth Order Gravity

, 2011
For a general class of analytic $f(R,R_{\alpha\beta}R^{\alpha\beta},R_{\alpha\beta\gamma\delta}R^{\alpha\beta\gamma\delta})$ we discuss the gravitational lensing in the Newtonian Limit of theory.
Stabile, A., Stabile, An.
core   +1 more source