Results 51 to 60 of about 14,910,135 (394)

Design of a 3 GHz Accelerator Structure for the CLIC Test Facility (CTF 3) Drive Beam [PDF]

open access: yes, 2000
For the CLIC two-beam scheme, a high-current, long-pulse drive beam is required for RF power generation. Taking advantage of the 3 GHz klystrons available at the LEP injector once LEP stops, a 180 MeV electron accelerator is being constructed for a ...
Carron, G.   +6 more
core   +1 more source

Large negative lateral shifts due to negative refraction [PDF]

open access: yes, 2011
When a thin structure in which negative refraction occurs (a metallo-dielectric or a photonic crystal) is illuminated by a beam, the reflected and transmitted beam can undergo a large negative lateral shift.
Antoine Moreau   +19 more
core   +3 more sources

Failure mechanism and fracture aperture characteristics of hard thick main roof based on voussoir beam structure in longwall coal mining

open access: yesEnergy Science & Engineering, 2019
The mechanism and fracture aperture of thick hard roof failure were theoretically analyzed from the perspective of elastoplastic mechanics. A uniform load cantilever beam was established by considering the voussoir beam structure and stress condition ...
Chunwang Zhang   +7 more
semanticscholar   +1 more source

Multi-structured-beam optical parametric oscillator

open access: yesOptics Express, 2020
Structured beams, conventionally generated through the spatial mode conversion of the Gaussian laser beams, have attracted great interest in recent years. Optical parametric oscillators (OPOs) have demonstrated the potential for the generation of tunable structured beams directly from an input pump source.
Varun Sharma   +3 more
openaire   +2 more sources

Prognostic Impact of Treatment Modalities, Including Targeted Compartmental Radio‐Immunotherapy, in a Cohort of Neuroblastoma Patients With CNS Metastases at Relapse

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Neuroblastoma (NB) with central nervous system (CNS) metastases is rare at diagnosis, but occurs more often during relapse/progression. Patients with CNS metastases face a dismal prognosis, with no standardized curative treatment available.
Vicente Santa‐Maria Lopez   +13 more
wiley   +1 more source

Analysis of Strengths of Reinforced Concrete Beam Structures with CFRP Sheet Using Abaqus Software 6.14

open access: yesJurnal Teknik Sipil dan Perencanaan, 2019
. Concrete beams are parts of a structure that serves as a channeling moment to the column structure. The structure of the beam which has undergone yielding reinforcement must be repaired.
Ahmad Yasir   +3 more
doaj   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

open access: yesFEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo   +2 more
wiley   +1 more source

A novel green antenna phase-shift system with data acquisition boards [PDF]

open access: yes, 2012
A novel green phase shifter system is proposed in this research. The system is developed by a combination of reconfigurable beam steering antennas and data acquisition (DAQ) boards. A combination of two reconfigurable beam steering antennas, located side-
Abd. Rahim, Sharul Kamal   +9 more
core  

Photonic quasi-crystal LEDs: design, modelling, and optimisation

open access: yes, 2007
In this paper we investigate improvement in performance attainable by etching Photonic Crystals and Photonic Quasi-Crystals into the top emitting surface of LEDs.
Charlton, M.D.B., Lee, T., Zoorob, M.E.
core   +1 more source

Astigmatic-Invariant Structured Singular Beams

open access: yesPhotonics, 2022
We investigate the transformation of structured Laguerre–Gaussian (sLG) beams after passing through a cylindrical lens. The resulting beam, ab astigmatic structured Laguerre–Gaussian (asLG) beam, depends on quantum numbers (n,ℓ) and three parameters. Two of them are control parameters of the initial sLG beam, the amplitude ϵ and phase θ.
Alexander Volyar   +3 more
openaire   +2 more sources

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