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 1692 for “"Collision"”.
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RFID anti-collision technique: coherent collision
… as possible. These methods are called “Anti- collision” protocols, and they all seek to somehow arbitrate how a multitude of ID tags and a reader negotiate the process of reading all of the ID tags. As the name implies, nearly all of the methods seek to detect and avoid collisions between ID …
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Aircraft collision models
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1982.
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Collision training prescription in collision by elite coaches: A qualitative study
Background Collision training is essential for coaches to prepare athletes for competition. However, there is a lack of understanding about how coaches approach collision training prescription. While exercise prescription principles such as frequency, intensity, type, duration, and volume are …
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Simplified Ship Collision Model
The serious consequence of ship collisions necessitates the development of regulations and requirements for the subdivision and structural design of ships to reduce damage and environmental pollution from collision, and improve safety. The on-going revision of IMO regulations on oil outflow …
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Infants' reasoning about collision events
… 2.5-month-old infants were presented with collision and no-collision events. In the collision events, a cylinder rolled down a ramp and collided with a toy bug that rested at the bottom of the ramp. In the no-collision events, the cylinder again rolled down the ramp but was prevented from …
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Collision avoidance via laser rangefinding
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1999.
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Collision with a crushable bow
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
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Prospects for the Collision-Free Car: The Effectiveness of Five Competing Forward Collision Avoidance Systems
Rear-end collisions in which the leading vehicle was stationary prior to impact and at least one vehicle was towed from the crash site represent 18% of all yearly crashes in the United States. Forward Collision Avoidance Systems (FCASs) are becoming increasingly available in production vehicles and …
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USS FITZGERALD COLLISION: MIDSHIPMEN CASE STUDY
… onboard USS Fitzgerald during the 2017 collision off the coast of Japan that killed seven Sailors. Many case studies and investigations have been written about the USS Fitzgerald collision from the point of view of the crew involved, but the Midshipmen who were on board at the time have …
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Simulation of ship-ice collision dynamics.
… the threat to survivability presented by head-on collision with multi-year ice or fragments of icebergs. The task of developing effective numerical models for studying the collision process has been hampered by the complexity of the physical interaction mechanisms. The present research considers …
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HEAVY TRUCK COLLISION WITH BRIDGE PIERS
… the New York State Department of Transportation, collision, both caused by vessels and vehicles, is the second leading cause of bridge failures after hydraulic. The current AASHTO-LRFD (2017) specification recommends designing a bridge pier vulnerable to vehicular impacts for an equivalent static …
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Electron-Collision Processes in the Ionosphere
Made available in DSpace on 2014-12-10T19:07:17Z (GMT). No. of bitstreams: 1 7412098.pdf: 14165766 bytes, checksum: d9d8246bd1adbe9f7663ed5e2a51c9ac (MD5) Previous issue date: 1973
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Improved collision detection in StarLogo Nova
… explores the problem of needing more accurate collision detection in StarLogo Nova while maintaining reasonable performance. Three new collision detection systems for StarLogo Nova are developed and evaluated. Compared to the spheres used to perform collision checks in the current system, the …
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Frontal collision analysis of City Car
This experiment tests the proposed crash system of the CityCar. The car is to fold during the crash to help decrease the impact force experienced by the passengers. The experiment was conducted by running a simulation of the car crashing into a wall compared to that of a rigid car with no folding, …
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Photoassociation of krypton and fluorine collision pairs
The photoassociation spectrum of Kr-F collision pairs in thermal equilibrium (293$\sp\circ$K) to KrF(B) has been observed using a laser-induced fluorescence technique with a tunable probe over the wavelength range 219 nm $\leq$ $\lambda$ $\leq$ 250 nm. The spectrum was then analyzed by numerical …
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Collision avoidance for multi-vehicle cooperative missions
This thesis focuses on collision avoidance for multi-vehicle coordinated missions. Building upon an existing cooperative control framework, we propose collision-avoidance methods that rely on practicably available obstacle information and allow safe operation without compromising on the mission …
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Planning under uncertainty for dynamic collision avoidance
We approach dynamic collision avoidance problem from the perspective of designing collision avoidance systems for unmanned aerial vehicles. Before unmanned aircraft can fly safely in civil airspace, robust airborne collision avoidance systems must be developed. Instead of hand-crafting a collision …
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Airborne collision avoidance in mixed equipage environments
… an optimized decision logic for airborne collision avoidance. There have been a series of technical reports, conference papers, and journal articles summarizing the research, but they have primarily investigated two-aircraft encounters with only one aircraft equipped with a collision …
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Collision induced decay of metastable baby skyrmions
… decay is a generic outcome of collisions between these heavy particles. We do so by exploring a 2+ 1 dimensional theory which also possesses metastable skyrmions. We use relaxation techniques to determine the size, shape and energy of static solitons in their ground state. These …
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