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 12 of 12 for “"Reduced Separation"”.
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Simulation-Based Analysis of Wake Turbulence Encounters in Current Flight Operations
… airspace system capacity is to reduce the separation requirements between aircraft in-flight. A key limiting factor to any reduction in separation is wake turbulence. The potential for aircraft to encounter wake turbulence poses a threat to both safety as well as increased efficiency. This …
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Cognitive and operational implications of non-homogeneous aircraft equipage for aviation system transformation
… this study analyzed the implementation of reduced separation standards in the North Atlantic. An experimental analysis was conducted to study the integration of mixed separation standards. Results show significant human factor concerns. Controllers had higher error rates at very low mixed …
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A program risk assessment method for aviation technology transitions
… to a technology transition to data link and reduced separation procedures in the North Atlantic airspace for commercial and business aircraft. This transition is facilitated by the International Civil Aviation Organization (ICAO) and supported by the Air Navigation Service Providers (ANSPs) …
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Analysis of Potential Wake Turbulence Encounters in Current and NextGen Flight Operations
… large headway resulting from the wake spacing separation criteria. Reducing wake vortex separations to a safe level between successive aircraft can increase capacity in the National Airspace System (NAS) with corresponding savings in delay times. One of the main goals of the Wake Encounter …
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Fuel benefit from optimal trajectory assignment on the North Atlantic tracks
… access their optimal altitude and speed due to separation requirements. Reduced separation up to 5 nautical miles can decrease the number of conflicts to 14.0%. Reducing the separation requirements both longitudinally and laterally can allow for increased accessibility of optimal altitudes, …
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A Computer Model to Predict Potential Wake Turbulence Encounters in the National Airspace
… Airspace System (NAS). Reducing wake vortex separations to safe levels between successive aircraft is essential for NextGen operations. One approach taken recently by ICAO and the FAA is to introduce a re-categorization (ReCat) of wake vortex separations to six groups from the existing five …
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Cooperative Clothoidal-Estimation Based Lane Detection For Vehicle Platooning
… headways than in typical driving scenarios. The reduced separation distance between the lead and follow vehicle reduces visibility and the reaction time available for the follow vehicle; this renders most modern Active Driver Assist Systems (ADAS) ineffective since they are not designed for …
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Investigating the effect of water quality on the adsorption of a xanthate collector in the flotation of a sulphide ore
… suggests that the efficiency of flotation separation is driven by the hydrophobicity that can be achieved by the mineral particles meant to be floated. The hydrophobicity is in turn driven by the adsorption of specialised reagents i.e. the collectors. Since collectors are added such that …
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Improvements to The Global Oceanic Model and Performance Assessment of The North Atlantic Organized Track System
… b) prediction of benefits among various aircraft separation minima and operational policies to assign flights to tracks in the OTS system; and c) forecast of OTS traffic over North Atlantic from 2020 to 2040. The preliminary results show that a concept of operation with longitudinal separation …
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Characterization of performance-limiting flow mechanisms in a centrifugal compressor stage
… Navier Stokes computations, complemented by reduced order flow modeling. The fundamental performance-limiting flow mechanisms in the diffuser are identified and used to physically relate important geometry features and operating conditions to the observed compressor pressure rise, efficiency, …
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Hydrocyclone fractionation of chickpea flour and measurement of physical and functional properties of flour and starch and protein fractions
… by pin milling and air classification with high separation efficiency. However, chickpea exhibits low separation efficiency because it has a relatively high fat content compared to other pulses. Therefore, the main goal of this research was to improve the starch-protein separation from chickpea …
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The effects of micro-vortex generators on normal shock wave/boundary layer interactions
… which persists through the normal shock with reduced strength. The microramp flow control also increased the spanwise-averaged skin-friction coefficient and reduced the spanwise-averaged incompressible shape factor, thereby improving the health of the boundary layer. The velocity in the …