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 33 for “"Collision Risk"”.
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A planned approach to high collision risk area
… of a vessel from the open ocean, where collisions are rare, to a high risk and heavy traffic area such as a Traffic Separation Scheme (TSS). Previous autonomy approaches generally view path planning and collision avoidance as two separate functions, i.e. a vessel will follow the planned …
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A planned approach to high collision risk area
… of a vessel from the open ocean, where collisions are rare, to a high risk and heavy traffic area such as a Traffic Separation Scheme (TSS). Previous autonomy approaches generally view path planning and collision avoidance as two separate functions, i.e. a vessel will follow the planned …
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Time-Based Collision Risk Modeling for Air Traffic Management
… accompanied by a corresponding increase in the risk of collision, and in response to a growing number of incidents and accidents involving collisions between aircraft, governments worldwide have developed air traffic control systems and procedures to mitigate this risk. The objective of any …
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Identification and tracking of marine objects for collision risk estimation.
… algorithm is applied in order to estimate the collision risk posed by each object present in the image. The result is an image with the objects identified by the placing of a white box around them. The predicted motion is shown and the estimated collision risk posed by that object is displayed. …
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Developing a simulation-based approach to collision risk of tidal energy converters and marine wildlife
… TECs, however, one major concern is the risk of an animal fatally colliding with the moving parts of a TEC i.e. collision risk. Collision risk was identified as an issue before the first grid-connected TEC was installed in 2008. Now, over 10 years later, it is still a major barrier in the …
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Potential collision risk of harriers Circus spp. with wind turbines during breeding season derived from GPS tracking
… aspects of flight behaviour that determine the collision risk has remained limited. In this context, GPS telemetry represents a promising but hitherto seldom applied technique. I used an extensive collection of GPS tracking data, including high-resolution flight tracks (measurement interval of 3 …
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Increasing Flexibility in the Design and Operation of Instrument Flight Procedures
… constraint reevaluation opportunities. The collision risk between procedures is identified as the main driver of their required separation. Through an analysis of modern aircraft navigation performance in normal operations, it is found that the collision risk between procedures is expected …
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Using movement modelling to improve the design and analysis of vantage point surveys in bird and wind energy studies
… communities of flying vertebrates. Mortality by collision with turbines is one of the main impacts on birds and bats associated with wind energy. Soaring birds are particularly vulnerable due to their collision prone behaviours, low manoeuvrability, and their slow population recovery rates. The …
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Real-time probabilistic collision avoidance for autonomous vehicles, using order reductive conflict metrics
Contemporary collision avoidance systems such as the Traffic Alert and Collision Avoidance System (TCAS) have proven their effectiveness in the Commercial Aviation (CA) industry within the last decade. Yet, TCAS and many systems like it represent attempts at collision avoidance that do not fully …
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Safety in Numbers? The Effect of Increasing Numbers of Bicycle Commuters on Bicycle-Automobile Collisions
… and pedestrians in an area lowers the automobile collision risk for individual cyclists and pedestrians is called the safety in numbers effect. This paper applies the safety in numbers effect to bicycling and pedestrian commuters in California cities from 2005 to 2011. The results indicate that …
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Safety in Numbers? The Effect of Increasing Numbers of Bicycle Commuters on Bicycle-Automobile Collisions
… and pedestrians in an area lowers the automobile collision risk for individual cyclists and pedestrians is called the safety in numbers effect. This paper applies the safety in numbers effect to bicycling and pedestrian commuters in California cities from 2005 to 2011. The results indicate that …
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On Capacity Estimation and Capacity-Safety Relationship in an Air Transportation Network
… and safe separation between flights considers collision risk as its limiting factor. To accommodate the increasing demand to safely manage air traffic flow, it is imperative to understand the interactions between these two components and the limiting factors that define their characteristics. …
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A Bikeability Index for Last-Mile Electric Cargo Cycles
… with the highest weights out of 100% include collision risk (24.3%-25.5%), visibility (11.1%-13.0%) and pavement condition (9.9%-12.4%). A simplified scoring index is derived using variables that could easily be applied to other routes to test its transferability.
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Motor Vehicle Collisions in London, Ontario: Estimating the influence of the built environment and children’s potential exposure
Motor vehicle collisions are the leading cause of death for children and youth worldwide. To effectively target interventions to improve child safety, it is necessary to identify where motor vehicle collisions occur most often and what factors make these areas more hazardous. Study #1 maps …
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Investigation of Orbital Debris Situational Awareness with Constellation Design and Evaluation
… and international commerce. Much of the debris collision risk is concentrated in specific high-density debris clusters in key regions of Low Earth Orbit (LEO). A potential long-term solution is to employ a constellation of observation satellites within these debris clusters to improve monitoring …
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Probabilistic motion planning and optimization incorporating chance constraints
… or human support robots where uncertainties and risks of plan failure can have severe impact. However, existing risk-aware planners mostly focus on low-dimensional planning tasks, meanwhile planners that can account for uncertainties and react fast in high degree-of-freedom (DOF) robot planning …
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Integral Quadratic Constraints and Safety Certificates for Uncertainty Characterization and Control Safety-Aware Filtering of Proximity Operations Between Satellites
… of a Client. This framework mitigates the collision risk based on integral quadratic constraints (IQCs) worst bounds recommendation, miss distance, Mahalanobis distance, and Probability of Collision (Pc) metrics. Innovative deterministic reachability methods based on integral quadratic …
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Bat swarming as an inspiration for multi-agent systems: predation success, active sensing, and collision avoidance
… include predation success, active sensing, and collision avoidance. To investigate the predation success, we modeled a group of bats hunting a number of collectively behaving prey. The modeling results demonstrated the benefit of localized grouping of prey in avoiding predation by bats. In the …
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Predicted safety & excavation progress algorithms for autonomous excavation
… can evaluate the degree of a potential collision risk by using the information of predicted motion of detected objects, working areas of the excavator, and safety indices calculation. The second component of this project covers the volume estimation for excavation progress estimation, …
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Tidal Energy, Underwater Noise and Marine Mammals
… of tidal-stream devices on marine mammals. Collision risk is often cited as a key concern. Therefore, my premise was - for marine mammals to avoid a collision with a marine renewable device (assuming they are on a collision course) they must first detect the device. It is well understood …
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