Search Results - BEAM, A. L*
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- Effect of radiation on 9
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- Lasers 7
- Industrial applications 5
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- Materials 5
- Defects 4
- Electron beams 4
- Optical materials 4
- Girders 3
- Testing 3
- Thin films 3
- Composite construction 2
- Concrete beams 2
- Eigenfunctions 2
- Eigenvalues 2
- Focused ion beams 2
- Structural frames 2
- Vibration 2
- Accounting 1
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- Biocompatible Materials 1
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Structural analysis of thin film silicon PV modules by means of large area laser beam induced current measurements
Published 2006“…The spatial variation of key properties of large area silicon thin film PV modules is investigated using a Laser Beam Induced Current (LBIC) system. …”
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Beam patterns of a thermooptical source of acoustic waves excited by a narrow laser beam in metals
Published 1985“…Beam patterns of a thermooptical source of acoustic waves excited by a narrow laser beam in metals…”
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Precision laser beam measurements
Published 1990“…The system was developed primarily for the spatial profiling of 'Sprite', Europe's largest ultra-violet laser, and is currently in routine use at the Rutherford Appleton Laboratory for this purpose [continued]……”
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Generating Mode 2 OAM beam using a circular leaky-wave antenna on a corrugated half-mode SIW with beam-scanning
Published 2024“…The conventional straight LWA is converted into a compact CLWA with a continuous long slot to create a uniform leaky-wave architecture at 17.5 to 21 GHz. …”
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Emergent biaxiality in nematic microflows illuminated by a laser beam
Published 2019“…We quantify the response of a nematic liquid crystal (NLC) undergoing a Poiseuille flow in the Stokes regime, while being illuminated by a laser beam incident perpendicular to the flow direction. …”
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Electron-beam instability in left-handed media
Published 2008“…We predict that two electron beams can develop an instability when passing through a slab of left-handed media (LHM). …”
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The use of custom beam profiles in laser deposition
Published 2013“…This work shows that through modifying the laser beam profile factors influencing the quality of a resulting deposition can be changed. …”
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Multiwavelength laser beam induced current data
Published 2018“…Multi-wavelength laser beam induced current measurements present a spatially resolved form of the external quantum efficiency.This is part of a collection (https://doi.org/10.17028/rd.lboro.c.4299728) for the article "Water based spray pyrolysis of metal-oxide solutions for CZTSSe solar cells using low toxicity amine/thiol complexants".…”
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The forced vibration of a partially delaminated beam
Published 1999“…In order to look at the underlying mechanism of the dynamics and failure of the material, a simplified model of a cantilever beam with a single delamination at its free end is considered. …”
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Off-axis laser beams for improved welding efficiency
Published 2021“…Most metallic laser welding processes use a laser beam incident perpendicular to the work surface, which maximises power density and gives a symmetrical heat profile. …”
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Using the vibration envelope as a damage-sensitive feature in composite beam structures
Published 2014“…Based on the idea of using the envelope's profile deflections and rotations induced by a moving load, this approach can lead to a practical cost-effective alternative to the traditional use of accelerometers and laser vibrometers.A parametric study has been undertaken, quantifying the sensitivity of the dynamic response of a realistic composite bridge to the presence of damage at different levels of partial steel-concrete interaction and velocity of the moving load.When compared to shifts in the natural frequencies, it has been verified that the proposed approach generally enjoys a higher sensitivity (so damage can be detected at an early stage), is more effective when closer to the ends of the bridge (where shear studs are more likely to be damaged), and displays an ordered set of results (which would reduce the possibility of a false damage).Further work is required to assess the effects of uncertainties and the adoption of more refined models for the moving load.…”
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The sunlight beam index
Published 2016“…This paper describes a fundamental rethinking of the basis for the evaluation of the sun- light potential of spaces. …”
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Lower bound eigenvalues of a Timoshenko-Ehrenfest vibrating beam using the Wittrick-Williams algorithm
Published 2024“…More recently subsequent research by the first and fourth authors explored the computation of negative eigenvalues for the Laplace operator, analogous to the axial vibration of a bar. …”
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Modelling of RC beam-column sub-assemblages under sudden column loss scenario
Published 2020“…The design of structures against disproportionate collapse is commonly achieved through structural assessment under a sudden column loss scenario. In this regard, a novel framework has been previously developed at Imperial College London, aiming to improve the accuracy of robustness assessment whilst maintaining a certain level of practicality. …”
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Reflecting tidal wave beams and local generation of solitary waves in the ocean thermocline
Published 2006“…Motivated by this possibility, a simple nonlinear long-wave model is proposed for the interaction of a tidal wave beam with the thermocline and the ensuing local generation of solitary waves. …”
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Mobility of a semi-infinite beam with constant curvature
Published 1999“…For a curved beam, however, there is interaction between the longitudinal and bending deformations leading to coupled extensional flexural wave propagation. …”
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Dynamic interfacial fracture of a double cantilever beam
Published 2018“…Using higher-order vibration modes causes divergence in the amplitude of ERR oscillation; this is due to the limitation of Euler-Bernoulli beams in vibration analysis.…”
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Condition monitoring for a neutral beam heating system
Published 2014“…Two system identification techniques were used to obtain a set of linear models of the system for use in the Kalman filter bank. …”
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Generation of higher harmonics in longitudinal vibration of beams with breathing cracks
Published 2016“…Numerical and experimental investigations in longitudinal vibration of beams with breathing cracks are presented. …”
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Post-local buckling-driven delamination in bilayer composite beams
Published 2015“…Analytical theories are developed for post-local buckling-driven delamination in bilayer composite beams. …”
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A four-beam optical polarimeter for robust particle shape detection
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Implementing a wide band constant beam-width constant source level: A variable aperture approach [Abstract]
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Wideband half-elliptical ring slot array loaded leaky wave antenna on a half-mode corrugated substrate integrated waveguide
Published 2024“…This paper presents a leaky-wave antenna with elliptical ring slot array loaded on a half-mode corrugated substrate integrated waveguide (HM-CSIW) operating at 25 to 36.5 GHz. …”
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Influence of laser beam brightness during surface treatment of a ZrO2 engineering ceramic
Published 2011“…The fibre laser radiated surface track was 32% larger in width and 51.5% longer in depth of penetration in comparison to that of the Nd:YAG laser. …”
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Measurement of the spatially distributed temperature and soot loadings in a laminar diffusion flame using a Cone-Beam Tomography technique
Published 2014“…Sample data from an ethylene laminar diffusion flame are compared with data in the literature for similar flames. …”
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Design of Alvarez beam scanning reflectarray with inversely proportional focal length
Published 2023“…In this letter, a beam scanning Alvarez reflectarray (RA) metasurface with its focal length ( F ) inversely proportional to the phase distribution on the Alvarez RA aperture is presented for ±45 o beam scanning coverage and less than 3-dB gain loss. …”
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Mixed-mode delamination in layered isotropic and laminated composite beam structures
Published 2017“…Completely analytical theories are presented for calculating the total energy release rate (ERR) in a mixed-mode delamination in layered isotropic and laminated composite straight beam structures and for partitioning it into opening mode I and shearing mode II components. …”
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Single feed dual-beam linearly polarized holographic metasurface antenna
Published 2024“…A single feed, dual-beam linearly polarized scalar and isotropic meta unit-cell loaded holographic metasurface based leaky-wave antenna (HMLWA) is proposed in this work. …”
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A pinned-pinned beam with and without a distributed foundation: A simple exact relationship between their eigenvalues
Published 2019“…The theory is then developed to yield an exact relationship between the static axial load in the beam and the frequency of vibration. …”
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Modelling and performance analysis of a sub-dew point chilled beam in mixed mode buildings
Published 1999“…Prompted by the energy crisis in the 1970's, European level fiscal and financial measures encourage energy efficient building design. …”
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Double Beam Shear (DBS) – a new test method for determining interlaminar shear properties of composite laminates
Published 2015“…The DBS uses an intact beam specimen with three equal-spaced supports under two loaders in such a way that each loader is applied at the middle of two supports. …”
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A novel method for the partition of mixed-mode fractures in 2D elastic laminated composite beams [Presentation]
Published 2014“…A novel method for the partition of mixed-mode fractures in 2D elastic laminated composite beams [Presentation]…”
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Double Beam Shear (DBS) – a new test method for determining interlaminar shear properties of composite laminates
Published 2015“…The DBS uses an intact beam specimen with three equal-spaced supports under two loaders in such a way that each loader is applied at the middle of two supports. …”
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Double beam shear (DBS) as a new test method for determining interlaminar shear properties of composite laminates
Published 2014Get full text
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A novel method for the partition of mixed-mode fractures in 2D elastic laminated unidirectional composite beams
Published 2014“…A powerful method for partitioning mixed-mode fractures on rigid interfaces in laminated unidirectional double cantilever beams (DCBs) is developed by taking 2D elasticity into consideration in a novel way. …”
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Vibration transmission through structural connections in beams
Published 2018“…Numerous studies have used flexural and longitudinal structural wave motion to model the vibrational response of angled junctions in beam-like structures, to better understand the transmission and reflection properties. …”
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A benchmarked framework for geometric digital twinning of slab and beam-and-slab bridges
Published 2020“…This challenge was tackled by investigating the entire workflow of geometric digital twinning for bridges and proposing a new framework to auto-generate bridge objects without needing to generate low-level surface primitives. …”
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Design of a concentric circular holographic metasurface using hexagonal anisotropic unit-cell for wireless communications
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