Results 51 to 60 of about 2,421,794 (345)

Volkov solution for two laser beams and ITER [PDF]

open access: yes, 2005
We find the solution of the Dirac equation for two plane waves (laser beams) and we determine the modified Compton formula for the scattering of two photons on an alectron.
A. I. Nikishov   +13 more
core   +1 more source

A New Family of Light Beams and Mirror Shapes for Future LIGO Interferometers [PDF]

open access: yes, 2004
Advanced LIGO's present baseline design uses arm cavities with Gaussian light beams supported by spherical mirrors. Because Gaussian beams have large intensity gradients in regions of high intensity, they average poorly over fluctuating bumps and valleys
Kip S. Thorne   +2 more
core   +2 more sources

AAPM's TG-51 protocol for clinical reference dosimetry of high-energy photon and electron beams.

open access: yesMedical Physics (Lancaster), 1999
A protocol is prescribed for clinical reference dosimetry of external beam radiation therapy using photon beams with nominal energies between 60Co and 50 MV and electron beams with nominal energies between 4 and 50 MeV.
P. Almond   +6 more
semanticscholar   +1 more source

Controlled generation of higher-order Poincaré sphere beams from a laser [PDF]

open access: yesNature Photonics, 2015
The angular momentum of light can be described by positions on a higher-order Poincaré sphere, where superpositions of spin and orbital angular momentum states give rise to laser beams that have many applications, from microscopy to materials processing.
D. Naidoo   +6 more
semanticscholar   +1 more source

Survival Outcomes and Complications Among Canadian Children With Retinoblastoma: A Population‐Based Report From CYP‐C

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Retinoblastoma (RB) is the most common pediatric ocular cancer, yet population‐based data on survival and risk factors remain limited. This study aimed to describe survival in a large national RB cohort and identify predictors of death and complications.
Samuel Sassine   +14 more
wiley   +1 more source

Extreme shape coexistence observed in 70Co

open access: yesCommunications Physics
The shape of the atomic nucleus is a property that underpins our understanding of nuclear systems, impacts the limits of nuclear existence, and enables probes of physics beyond the Standard Model.
Cade Dembski   +24 more
doaj   +1 more source

Flexural ductility of lightweight-aggregate concrete beams

open access: yesJournal of Civil Engineering and Management, 2016
This paper describes an experimental study on the flexural ductility of lightweight-aggregate concrete beams in­cluding concretes with compressive strengths between 22.0 and 60.4 MPa and dry densities between 1651 and 1953 kg/m3.
Luís F. A. Bernardo   +2 more
doaj   +1 more source

Layer-dependent magnetic phase diagram in Fe n GeTe2 (3 ≤ n ≤ 7) ultrathin films

open access: yesCommunications Physics, 2022
2D magnetism offers the prospect of ordered and controllable magnetic states at reduced dimensions and there is a desire to obtain materials which can realise these properties at room temperature.
Qinxi Liu   +6 more
doaj   +1 more source

Experimental and Numerical Study of Strengthening Prestressed Reinforced Concrete Beams Using Different Techniques

open access: yesBuildings, 2023
This study aimed to evaluate the static response of prestressed reinforced concrete beams strengthened in their flexure and shear properties using different strengthening techniques, steel plates, and externally bonded woven carbon fiber fabric (WCFF ...
Ahmed S. Eisa   +4 more
doaj   +1 more source

Feasibility and Safety of High‐Dose Proton Re‐Irradiation in Recurrent Pediatric Central Nervous System Tumors: A Single‐Institution Retrospective Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Pediatric central nervous system (CNS) tumors often recur despite multimodality therapy. Although re‐irradiation (re‐RT) has historically been limited by concerns for severe late toxicities, modern techniques have renewed interest in this approach. Proton therapy provides dosimetric advantages that may enable curative re‐treatment with
Jin‐Ho Song   +15 more
wiley   +1 more source

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