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 26 for “"Multiple-channel"”.
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Multiple channel maximum entropy spectral estimator and its application.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Improving the Capacity in Wireless Ad Hoc Networks through Multiple Channel Operation: Design Principles and Protocols
… the available frequency into several orthogonal channels, which can be used simultaneously within a neighborhood, increasing capacity by exploiting multiple channels becomes particularly appealing. To improve the capacity of wireless ad hoc networks by exploiting multiple available channels, I …
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Advanced fibre Bragg grating structures: design and application
… superstructured Bragg gratings for identical multiple channel operation, Bragg gratings for pulse-shaping applications and Bragg gratings for add-drop applications in high bit-rate systems. Development of the fabrication-technique developed and analysed as a part of this work has led to a …
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Fast magnetic resonance spectroscopic imaging using RF coil arrays
… same time, receive-coil arrays using 4 and 23 channels have been developed and reported to produce improved SNR over conventional quadrature detection by single coils. Fast spectroscopic imaging algorithm using spiral k-space trajectories and multiple-channel coil arrays is proposed in order to …
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Interaction of Cognitive Style and Learner Control of Presentation Mode in a Hypermedia Environment
… group that offered the choice of single-channel presentations in addition to the multiple-channel presentations. After interacting with the program participants completed a ten item post test consisting of five recall and five problem-solving questions. Their actions within the hypermedia …
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Issues in the processing and analysis of functional NIRS imaging and a contrast with fMRI findings in a study of sensorimotor deactivation and connectivity
… artefact removal in fNIRS are compared. Imaging channels with negligible distance between source and detector are used to detect subject motion, and in data sets containing deliberate motion artefacts, independent component analysis and multiple-channel regression are found to improve the …
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Simultaneous Media Usage: Effects on Attention
Media layering, the simultaneous use of multiple unrelated media sources, has been documented as an increasing behavior trend (Roberts, Foehr, & Rideout, 2005) that marks a qualitative and quantitative difference in the way media is experienced. Presently, the impact on consumers from media …
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Active structural acoustic control smart panel with small scale proof mass actuators
… identification of simple and effective single channel feedback control laws. In particular the stability properties and control performance produced by Proportional, Integral, Derivative, PI, PD, PID feedback control laws are assessed with reference to two simple problems where a single degrees …
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Multi-channel blind system identification for central hemodynamic monitoring
Multi-channel Blind System Identification (MBSI) is a technique for estimating both an unknown input and unknown channel dynamics from simultaneous output measurements at different channels through which the input signal propagates. It is a powerful tool particularly for the identification and …
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Single-Microphone Speech Dereverberation: Modulation Domain Processing and Quality Assessment
… interest over the past few years. Although multiple channel dereverberation methods provide some improvements in speech quality/ intelligibility, single-channel dereverberation remains an open challenge. Two types of advanced single-channel dereverberation methods, namely acoustic domain …
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Satellite Rural Telephone Network Design: A Methodology for Performance Optimization
… different combinations of network topologies and multiple access techniques have been implemented, and a technical-economic assessment has been performed for the different technologies under different traffic scenarios. Traffic intensity, network size and per-minute user costs have been optimized …
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Low temperature lithographically patterned metal oxide transistors for large area electronics
… threshold voltage can be modified by varying the channel thickness alone, without requiring the additional complexity of multiple channel materials or different dopings. The baseline lithographic process was further developed to enable the integration of FETs of different channel thicknesses, and …
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Feedback Control of Multi-Story Structures under Seismic Excitations
… were realized in the state space, where the Multiple Channel Control (MCC) model, the Single Channel Control (SCC) model and the Special Single Channel Control (SSCC) model were proposed. The MCC model is a general multiple input/multiple output (MIMO) dynamic system; the SSCC model is a …
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Resource Allocation for Wireless Distributed Computing Networks
… looking for "killer" applications for increased channel capacity. However, WDCNs have several unique problems compared with currently well-investigated methods for wireless sensor networks and wired distributed computing. For example, it is difficult for WDCNs to be power/energy efficient …
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A piezoelectric translational flow agitator for active air cooling of electronics.
… carbon fiber composite, is easily extended to a multiple-blade system without adding much mass. The micro pin fin arrays were created with the LIGA photolithography technique. The cooling performance of the heat sink system was demonstrated in single-channel and multiple-channel test facilities …
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DIGITAL ANALYSIS OF CARDIAC ACOUSTIC SIGNALS IN CHILDREN
… were recorded in 360 children with a single-channel device and in 15 children with a multiple-channel device. Time intervals between acoustic signals were measured. Short-time Fourier transform (STFT) analysis was used to present the acoustic signals to a digital algorithm for detection of …
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Novel rare-earth-doped planar waveguide lasers
… techniques, the design and implementation of new channel and planar waveguide structures and the demonstration of compact diode-bar pumped planar waveguide lasers. <br/><br/>Laser operation of buried planar waveguides fabricated by a novel solid-state ion-exchange technique based on direct bonding …
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A Proactive Routing Protocol for Multi-Channel Wireless Ad-hoc Networks
… is designed to have stations share a single channel in a given network. However, many of the IEEE 802.11 physical (PHY) layer specifications define multiple channels and allow the simultaneous, non-interfering use of some of these channels. Therefore, multiple communications can occur at the …
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Design and implementation of high linearity FPGA-TDCs and an integrated large scale TCSPC system for time-resolved applications
… size, high cost, low conversion rate and limited channel number. With the recent rapid development of semiconductor technology, Field Programmable Gate Arrays (FPGA) become the promising platforms for high-performance digital TCSPC systems.;The time-to-digital converter (TDC) is the core component …
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Underspecification and parallel processing in sentence comprehension
… ambiguity resolution is proposed: the stochastic multiple-channel model of ambiguity resolution (SMCM). It is further shown that the quantitative predictions of the SMCM are in agreement with experimental data. In conclusion, it is argued that the human sentence comprehension system is parallel …
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