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8021
Multi-branch sandwich piezoelectric energy harvester : mathematical modeling and validation
Published 2021“…The proposed harvester comprises of a main sandwich beam as substrate with a patch of piezoelectric layer bonded over it. …”
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Journal Article -
8022
Investigation of soil-structure interaction for deep excavations
Published 2023“…The deep excavation was supported by a complex ’combi-wall’ cofferdam, a reinforced concrete (RC) capping beam, and two levels of internal bracing, and its performance was assessed through measured wall deflections, bracing member loads, and site and bunker water levels. …”
Thesis -
8023
Programmable interfacial band configuration in WS2/Bi2O2Se heterojunctions
Published 2024“…Using this material combination, we further design a sophisticated band architecture incorporating both type-I (WS2 straddles Bi2O2Se, fluorescence-quenched) and type-I (Bi2SeO5 straddles WS2, fluorescence-recovered) alignments in one sample through focused laser beam (FLB). By programming the FLB trajectory, we achieve a predesigned localized fluorescence micropattern on WS2 without changing its intrinsic atomic structure. …”
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Journal Article -
8024
Computational design of a novel soft-Xray-based turbulence diagnostic in NSTX-U
Published 2024“…Assumptions from the previous study, such as infinitely thin beam size, are relaxed to assess their impact on reconstruction. …”
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Thesis -
8025
Constructing 3D self-supporting surfaces with isotropic stress using 4D minimal hypersurfaces of revolution
Published 2021“…The existing thrust network analysis methods discretize both geometry and material by approximating the continuous stress field through uniaxial singular stresses, making them an ideal tool for analysis and design of beam structures. In contrast, our method works on piecewise linear surfaces with continuous material. …”
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Journal Article -
8026
On shear adhesion of adhesive fibrils
Published 2024“…Our model reveals that, depending on the fibrillar aspect ratio, the adhesive fibril exhibits three distinct deformation regimes: thin film shearing, thick block shearing, and slender beam bending. The important parameters governing the shear adhesion of the lap shear system are the aspect ratio of fibrils, elastic moduli of the fibrils and substrates, while the Poisson's ratio of fibrils has no noticeable effect. …”
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Journal Article -
8027
Non-Destructive Material Characterization Methods /
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software, multimedia -
8028
Squeezing the Quantum Noise of LIGO below the Standard Quantum Limit
Published 2024“…The SQL applies when using uncorrelated photons or coherent light to measure the object, such as a laser beam. However, introducing quantum correlations through squeezed light, a technique called squeezing (Chapter 2), can circumvent this limit. …”
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Thesis -
8029
Surface plasmon resonance (SPR) enhanced biosensors
Published 2016“…The fabrication steps of the arrays were composed of electron-beam lithography and nano-imprint lithography. In comparison with the PAuNH array, the AuNH array offered higher field enhancement for fluorescence when only LSP was excited. …”
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Thesis -
8030
SPP/LSP coupled hybrid mode directed multi-functional surface-enhanced Raman system
Published 2013“…In the experiment, SPPs are excited by a tightly-focused radially polarized beam and interact with the nanospheres to generate the plasmon-hybrid-mode, exactly according to the second configuration aforementioned. …”
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Thesis -
8031
Hybrid lasers and modulator on silicon in the near- and mid-infrared region
Published 2017“…The lateral grating can be fabricated by CMOS-compatible inline lithography, which avoids the use of expensive and time-consuming electron beam lithography. The device works at room temperature with the single-side-suppression-ratio (SMSR) of 20 dB and the threshold current density is 1.54 kA/cm2. …”
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Thesis -
8032
Selected Problems of Solid Mechanics and Solving Methods /
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software, multimedia -
8033
Developments in THz Polaritonics: Towards Integrated Nonlinear THz Spectroscopy
Published 2024“…The optical pump light is focused onto the bevel, after which it refracts and becomes confined within the waveguide by total internal reflection. This allows the pump beam to repeatedly drive the generated THz field during its multiple back-and-forth traversals within the LN slab. …”
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Thesis -
8034
Investigations into femtosecond laser hybrid manufacturing for 3D power sources
Published 2021“…These VPGs are then demonstrated as active beam steering units and tuneable spectroscopic optical elements. …”
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Thesis-Doctor of Philosophy -
8035
Compositionally graded alloys fabricated using the laser powder bed fusion technique
Published 2023“…In this study, among the several available AM processes, the LPBF technique is selected to fabricate compositionally graded alloys, as it has higher spatial resolution and lower cost, compared to directed energy deposition (DED) and electron beam powder bed fusion (EBPBF). With three different LPBF setups and four alloy systems examined in this study, the following objectives are achieved: (i) screening out, from a large range of compositions, the alloys that are amenable to LPBF, (ii) examining the effects of the LPBF characteristics, e.g., rapid cooling rate, on the micro-/meso-structure and properties of the fabricated parts with varying chemical compositions, and (iii) evaluating the fabrication methods in terms of types of achieved gradation (stepwise or smooth), efficiency, and level of chemical segregation. …”
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Thesis-Doctor of Philosophy -
8036
Synthesis and characterization of Cu-Chalcogenide nanocrystals for potential applications in low-cost solar cells
Published 2013“…Since the opto-electrical properties of the NCs are highly dependent on the composition and crystal structure, X-ray diffraction, selected area electron diffraction, convergent beam electron diffraction and Raman spectroscopy were used to determine their crystal structure. …”
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Thesis -
8037
Enhancing tensile and fatigue properties of additively manufactured alloys by post-processing heat treatment
Published 2022“…Amongst the different AM techniques, laser beam-powder bed fusion (LB-PBF) is the most abundantly investigated process due to its deep market penetration as well as the vast number of LB-PBF machine manufacturers. …”
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Thesis-Doctor of Philosophy -
8038
A combined numerical and experimental approach to investigations of body-freedom flutter on flying wings
Published 2024“…The structural dynamics are modelled using an Euler-Bernoulli beam which is tightly coupled with the rigid-body motions of the flying wing, and subsequently discretised using the finite-element method. …”
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Thesis-Doctor of Philosophy -
8039
Investigations into high resolution imaging and contouring for diagnostic bio-applications
Published 2016“…Thermal perturbation of the target tissue with infrared beam was used to effect the required change in the bio-speckle pattern. …”
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Thesis