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 20 of 3411 for “"narrow"”.
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Hydrodynamic interactions in narrow channels
… multiple particles undergoing Brownian motion in narrow, microfluidic channels and study their coupling through hydrodynamic interactions. Our experiments show that the hydrodynamic particle-particle interactions are distance-independent in these channels. We also show that these interactions …
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Ultra-Narrow Laser Linewidth Measurement
… interferometer (LC-RDSHI) for ultra-narrow linewidth measurement, including the theoretical analysis, experimental implementation, further modification on the system and more applications. Recently, less than 1kHz linewidth fiber lasers have been commercialized. But even the …
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Tension Control In Narrow Fabric Weaving
… charts to regulate yarn tension and optimise narrow fabric weaving; as a consequence manufacturing traceability will also be optimised. The brake weight charts will be derived by measuring and modelling various parameters like yarn tension, yarn friction, yarn crimp and yarn damage. The yarn …
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Topological phases in narrow-band systems
… interactions and lattice effects especially narrow-band systems. The first realizes the fractional quantum Hall effect using geometric frustration and ferromagnetism to obtain a nearly flat band with a large bandgap and non-zero Chern number. This system can support this effect at high …
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Sound Propagation via Narrow Beam Audio Projection
The parametric acoustic array is a nonlinear phenomenon of physics theoretically described over fifty years ago. It consists in the generation of secondary sound waves by the propagation of two collimated primary ultrasonic waves at a close frequency. The sound wave generated corresponds to the …
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Analysis of ultra-narrow ferromagnetic domain walls
A mathematical analysis of ultra-narrow ferromagnetic domain walls was undertaken, with graphical plots coded in the programming language TrueBASIC. An intrinsic inter-atomic potential stemming from the breakdown of the continuum approximation of matter is calculated and its contribution to the …
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Narrow frequency-band laser with optical feedback
In this paper we discuss the construction of a narrow frequency-band laser with optical feedback. We use a distributed Bragg reflector (DBR) laser diode centered at the cesium D₂ transition wavelength, [gamma] = 852 nm. The linewidth of this diode is reduced by several orders of magnitude by means …
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Capacitive transducers for narrow-band vibratory displacements
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
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The narrow gauge railway versus the standard gauge
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1888.
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Narrow-band noise performance of pumped nonlinear systems.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1966. Sc.D.
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Nonlinear filtering for narrow-band time delay estimation
… spatial aliasing, which results from tracking narrowband, high frequency sources. I develop a theoretical model for the evolution of each TDoA from a bound placed on the velocity of the target being tracked. This model enables an efficient form of exact marginalization. I then present …
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The narrow escape problem : a matched asymptotic expansion approach
… the absorbing window. This is known as the narrow escape problem. Since the mean escape time diverges as the window shrinks, the calculation is a singular perturbation problem. We extend our results to include N absorbing windows of varying length in two dimensions and varying radius in …
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Investigation of Narrow Spectrum Targets in Antibacterial Drug Discovery
… I represents a potentially promising narrow-spectrum target as studies have arisen demonstrating its essentiality in bacterial species lacking the only other type IA topoisomerase (topoisomerase III). Additionally, recent studies demonstrating the essentiality of the fabK gene …
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Efficient narrow-band speech transmission over land mobile channels.
This thesis addresses the problems of speech quality, and channel bandwidth efficiency, for speech transmission in mobile communications.In the first part, a flexible, real-time, programmable, mobile radio channel simulator is proposed. The conventional basic configuration of the simulator was …
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Efficiency Considerations in Narrow-Band Gallium-Arsenide Acoustoelectric Devices
Power loss mechanisms are investigated in high-power SAW-based acoustoelectric devices on gallium arsenide. Power losses in reflective UHF SAW driving transducers often used in such devices are studied by a detailed coupled-mode model. The results of this model (which show excellent agreement with …
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Experimental investigation of flame propagation in long, narrow tubes
Combustion of premixed propane-air flames propagating in horizontal quartz tubes of small diameter (6.4 mm) was studied using high-speed photography and Particle Streak Velocimetry (PSV). Several regions of propagation were established, including an initial region of uniform propagation, a …
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Performance of narrow band internet of things (NBIoT) networks
Narrow Band Internet of Things (NBIoT) is a Low Power Wide Area Network (LPWAN) technology that has been standardised by 3GPP in Release 13 to work in cellular networks [15]. The main characteristics of NBIoT are its extended coverage compared to other cellular technologies such as LTE; its high …
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Evaluation of narrow and broad leaflet isolines of soybeans
… <i>Glycine max.</i> (L.) Merrill, by using narrow and broad leaflet isolines. The breeding procedure employed developed pairs of isolines whose genetic backgrounds were a random recombination of the narrow and broad leaflet genotypes of their parents. Results obtained from 1976 to 1978 …
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Straight and narrow - Irish witch belief, trials and memory : Straight and narrow: a novel, and Irish witch belief, trials and memory: a critical component
The following PhD thesis in Creative Writing is comprised of a creative and critical component. The former is a Young Adult novel which takes as its inspiration the Islandmagee witch trial of 1711. Most of the novel is set in a contemporary fictionalised version of Islandmagee, which, based on true …
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