Results 41 to 50 of about 2,421,794 (345)

Observation of self-accelerating Bessel-like optical beams along arbitrary trajectories [PDF]

open access: yes, 2013
We experimentally demonstrate self-accelerating Bessel-like optical beams propagating along arbitrary trajectories in free space. With computer generated holography, such beams are designed to follow different controllable trajectories while their main ...
Chen, Zhigang   +8 more
core   +1 more source

Tractor Beams, Pressor Beams and Stressor Beams in General Relativity [PDF]

open access: yesUniverse, 2021
The metrics of general relativity generally fall into two categories: those which are solutions of the Einstein equations for a given source energy-momentum tensor and the “reverse engineered” metrics—metrics bespoke for a certain purpose. Their energy-momentum tensors are then calculated by inserting these into the Einstein equations.
Jessica Santiago   +2 more
openaire   +3 more sources

CHEMICALLY TREATED GLUED LAMINATED PARICÁ TIMBER (Schizolobium parahyba var. amazonicum) [PDF]

open access: yesEngenharia Agrícola, 2019
In the production of glue-laminated timber (GLT), boards derived from planted forest wood with easy workability are glued on top of one another. The main objective of the present work was to evaluate the performance of paricá timber GLT beams (5 × 10 cm)
Rodrigo F. Terezo   +2 more
doaj   +1 more source

Observation of accelerating parabolic beams [PDF]

open access: yes, 2008
We report the first observation of accelerating parabolic beams. These accelerating parabolic beams are similar to the Airy beams because they exhibit the unusual ability to remain diffraction-free while having a quadratic transverse shift during ...
Bandres, Miguel A.   +3 more
core   +1 more source

High quality concrete beams bending under the long and short term loads [PDF]

open access: yesFacta Universitatis. Series: Architecture and Civil Engineering, 2006
The paper deals with the analysis of different compounds for the production of high-quality concrete and an experimental research of the selected high quality concrete beams. The beams have been bent by both the short term and long term transverse loads.
Radojičić Vladimir
doaj   +1 more source

Polarization shaping for control of nonlinear propagation [PDF]

open access: yes, 2016
We study the nonlinear optical propagation of two different classes of space-varying polarized light beams -- radially symmetric vector beams and Poincar\'e beams with lemon and star topologies -- in a rubidium vapour cell.
Bouchard, Frédéric   +8 more
core   +2 more sources

Hexadecapole strength in the rare isotopes 74,76Kr

open access: yesPhysics Letters B, 2023
In the Ge-Sr mass region, isotopes with neutron number N≤40 are known to feature rapid shape changes with both nucleon number and angular momentum. To gain new insights into their structure, inelastic proton scattering experiments in inverse kinematics ...
M. Spieker   +17 more
doaj   +1 more source

Beam-beam effects

open access: yesAIP Conference Proceedings, 1995
A review of the beam‐beam effects in storage rings is given with emphasis on experimental results and new simulation techniques.
openaire   +2 more sources

APPLICATION OF FINITE ELEMENT METHOD TAKING INTO ACCOUNT PHYSICAL AND GEOMETRIC NONLINEARITY FOR THE CALCULATION OF PRESTRESSED REINFORCED CONCRETE BEAMS

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2017
. Objectives Modern building codes prescribe the calculation of building structures taking into account the nonlinearity of deformation. To achieve this goal, the task is to develop a methodology for calculating prestressed reinforced concrete beams ...
Vladimir P. Agapov, Kurban R. Aidemirov
doaj   +1 more source

Non-Paraxial Accelerating Beams

open access: yes, 2012
We present the spatially accelerating solutions of the Maxwell equations. Such non-paraxial beams accelerate in a circular trajectory, thus generalizing the concept of Airy beams.
Ido Kaminer   +4 more
core   +1 more source

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