Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Spectral Selectivity"”.
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Binaural spectral selectivity in normal-hearing and hearing-impaired listeners
Ziel dieser Arbeit ist es, die Interaktion zwischen der Frequenzselektivität des menschlichen Gehörs und binauralem Hören durch psychoakustische Verdeckungsexperimente zu untersuchen. Im allgemeinen wird ein diotischer Verdecker benutzt, wohingegen das Signal entweder ebenfalls diotisch ist …
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Improving solar thermal receiver performance via spectral and directional selectivity
… can be improved by taking advantage of the spectral and directional properties of sunlight. Spectral properties refer to the distribution of wavelengths associated with solar photons, with most solar energy arriving as photons with wavelengths from 300 - 2500 nm. Spectral selectivity entails …
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Cavity absorber-emitters for high-temperature solar thermophotovoltaics
… a low-bandgap PV cell from a different, spectrally selective emitter surface, producing electricity. This added spectral selectivity allows for improved photovoltaic conversion efficiencies compared to a standard PV cell illuminated with the solar spectrum. STPV systems, however, often …
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Thin-Film Polymer Nanocomposites Composed of Two-Dimensional Plasmonic Nanoparticles and Graphene
… to reduce light transmittance but has limited spectral selectivity. To reduce the cost of metalized films and to improve the spectral selectivity, I have employed plasmonic nanoparticles in polymers to fabricate spectral-selective tinted films. First, I have synthesized two-dimensional (2D) …
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Imaging of bromine oxide and formaldehyde using Fabry-Perot interferometer correlation spectroscopy
… spatio-temporal resolution with a high trace gas selectivity, but that are also robust and compact enough to be used in field measurements. In this thesis, a prototype imaging instrument for formaldehyde (HCHO) and bromine oxide (BrO) based on Fabry-Perot interferometer correlation spectroscopy in …
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Optimal wavefronts and subwavelength structures : computer-aided design for optics and acoustics
… photonic crystal solar absorber with wide-angle spectral selectivity. Next, we discuss a multiscale acoustic model of a phononic crystal with strong spatial dispersion. We are optimistic that our computational frameworks for wavefronts and subwavelength structures can be generalized and applied …
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Optimization of High Entropy Borides for Advanced Applications
… UHTCs are also known to exhibit an intrinsic spectral selectivity and low thermal emittance, which makes them suitable for solar absorbers for applications in concentrating solar plants. In this context, the recently discovered High Entropy Borides (HEBs), where five or more metal cations are …
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Solid-State NMR of Metallic and Paramagnetic Systems
… moments and introduce significantly greater spectral broadening, often combined with very fast nuclear relaxation, so that these systems are challenging to study. However, these same hyperfine interactions can also provide important details of the electronic and magnetic structure for a …
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Engineering upgrades to the Motional Stark Effect diagnostic on Alcator C-Mod
… for mse detectors. The system allows high-spectral selectivity at an étendue of > 15mm2 sr for four simultaneous polarization measurements on the same viewing sightline. It sequentially passes light among four different < 0.9nm FWHM temperature-tuned filters to custom avalanche photodiode …
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¹H-MRSI at 7T using spectral-selective binomial excitation and adiabatic refocusing
… such as 7T can provide higher SNR and better spectral separation of metabolite peaks, but they also introduce pronounced B₀ and B₁ field inhomogeneity, larger chemical shift displacement error (CSDE), stricter specific absorption rate (SAR) constraints, longer acquisition time, and technical …
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Investigation of physical and electro-optic diffractive structures for energy-efficient smart window applications
The cost of energy used for lighting, heating, and cooling in commercial and residential buildings is increasing annually while wasteful losses and gains through inefficient windows can be avoidable with advanced technology. Energy-efficient smart windows in commercial and residential buildings can …