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 21 for “"sub-channel"”.
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Integrated fuel performance and thermal-hydraulic sub-channel models for analysis of sodium fast reactors
… couple a model for metal fuel performance to a sub-channel analysis code to more precisely predict critical phenomena that could lead to pin failure for steady-state and transient scenarios. The fuel code that was used is the recently developed and benchmarked FEAST-METAL code. The sub-channel …
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Optimization and Acceleration of the Nodal Expansion Method (NEM) and its Multi-Physics Coupling with the Sub-channel Thermal-Hydraulic/Fuel Modeling Code CTF/CTFFuel.
North Carolina State University Theses Nuclear Engineering.
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Computational fluid dynamics modeling and comparison of advanced techniques for heat transfer augmentation for nuclear applications
… temperature. The impact of twisted tapes along sub-channel for the water flow through NuScale SMR’s 2X2 RB at the normal operating conditions showed that the Nusselt number (Nu) and secondary flow were enhanced by 101% and 0.16 as compared to the case of plain sub-channel, respectively. On the …
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Isolation of the Cytosolic C-Terminus Segment of Mammalian Kca Channel a Subunit
<p>The last 20 years of research into ion channels has unraveled unexpected features of the BK<sub>ca</sub> channel as a rheostast for cell activity in excitable tissues and homeostatically fine tuning many biological activation processes in the cell. Great attention has been dedicated to the …
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RF-EMF Radiation Exposure and Radio Resources Management in 5G Wireless Network
… physical resource blocks (PRBs), frequency (sub-channels) is required. Deciding on how to efficiently allocate, manage, and control the resources dynamically among several slices and users in an isolated multi-tenancy scenario without compromise on the QoS/quality of experience (QoE) of user …
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Channel Related Optimization of Wireless Communication Systems
… used plays a major role to enable reliable channel estimates from a small amount of pilot symbols. Rearrangement of the pilot pattern enables a reduction in the number of needed pilot symbols up to a factor 10, still retaining the same bit error performance. The effect of the number of …
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Critical power characteristics of axially heterogeneous tight bundle designs
… length requires further investigations via sub-channel analysis, using the code VIPRE-01. Results of radial quality distribution at the axial location of dryout are then incorporated and yield the M3-CISE4 (modified CISE4 version 3) correlation development. Another approach utilized in the …
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Two-phase CFD analyses in fuel assembly sub-channels of Pressurized Water Reactors under swirl conditions
… of boiling flows under swirl conditions in sub-channel geometries of pressurized water reactors (PWR) FAs, including a realistic description of the critical heat flux (CHF)-phenomena and identification of two-phase indicators characterizing CHF-phenomena. The numerical simulations were …
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On the Use of Uncalibrated Digital Phased Arrays for Blind Signal Separation for Interference Removal in Congested Spectral Bands
… partitions using a polyphase filter-bank channelizer, and a rank-reduced version of the received matrix on each sub-channel is computed through reconstruction by retaining a subset of its singular values. The wideband spectrum is synthesized through a near-perfect polyphase reconstruction …
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Material and device aspects of semiconducting two-dimensional crystals
… and enable devices with immunity to short channel effects in addition to compatibility with silicon CMOS processes.^ In this thesis, the fundamental device implications of using semiconducting 2D crystals are investigated. This includes: 1) the optimization of device fabrication processing …
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Calibration of sampling clock skew in high-speed, high-resolution time-interleaved ADCs
… is an essential technique, whereby N ADC channels, each operating at a sampling frequency of fs, are used to achieve an effective conversion rate of N - fs. While time-interleaving enables higher conversion rates in a given technology, mismatch issues such as gain, offset, and sampling …
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Outage Capacity and Code Design for Dying Channels
In wireless networks, communication links may be subject to random fatal impacts: for example, sensor networks under sudden power losses or cognitive radio networks with unpredictable primary user spectrum occupancy. Under such circumstances, it is critical to quantify how fast and reliably the …
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Resource management of cognitive radio networks with optimization methods.
… adapts its transmission methods and the channel usage so that the induced interference to the licensed user is regulated. The dissertation focuses on solving three kinds of problems of the cognitive radio networks: (1) Multiple-input and multiple-output (MIMO) transmission of cognitive …
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Cerebral Microcirculatory Effects of Maturation
… Norepinephrine and 5-HT occupancy at the pD<sub>2</sub> rose significantly in 2B segments, but did not change with age in 4B segments of NE contracted arteries and decreased significantly in 2B segments of 5-HT contracted arteries. Together these changes suggest that in 5-HT and NE contracted …
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Development of fission gas swelling and release models for metallic nuclear fuels
… to be used in a coupled fashion with the coolant sub-channel analysis code COBRA, the accuracy of the results depend on the model used for fuel swelling.
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The crystal structure of human Navβ3-Ig domain and its implications
The mammalian Voltage-gated sodium (Na<sub>v</sub>) channel is composed of a single α subunit (~ 260 kDa), a multi-pass membrane protein that renders ion selectivity and two or more Na<sub>v</sub>β subunits (25‒40 kDa), that are Type I single-pass membrane proteins and regulate Na<sub>v</sub>α …
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Characterization of hyporheic zone processes of a northern prairie stream
… and biological gradients present in the stream channel and bank sediments. The effects of cattle grazing at the streamside interface of the riparian zone were also examined at two locations to determine land use impacts on the hyporheic zone. </p><p> Electrical conductivity (EC) and ammonium …
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A robust momentum closure approach for multiphase computational fluid dynamics applications
… past have been dependent upon correlation-based sub-channel analysis codes. The success of these M-CFD methods in simulating two-phase flow and boiling heat transfer depends on their demonstrated accuracy and robustness, which signals a dual need for the comprehensive analysis of existing data …
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Efficient Media Access Control and Distributed Channel-aware Scheduling for Wireless Ad-Hoc Networks
We address the problem of channel-aware scheduling for wireless ad-hoc networks, where the channel state information (CSI) are utilized to improve the overall system performance instead of the individual link performance. In our framework, multiple links cooperate to schedule data transmission in a …
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Multi-physics modelling of liquid metals in Advanced Nuclear Systems
L'abstract è presente nell'allegato / the abstract is in the attachment
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