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Here ψ is the angle between the path of the wave source and the direction of wave propagation (the wave vector k), and the circles represent wavefronts. Consider one of the phase circles of Fig.12.3 for a particular k , corresponding to the time t in the past, Fig.12.2.
Pseudo-range multilateration, often simply multilateration (MLAT) when in context, is a technique for determining the position of an unknown point, such as a vehicle, based on measurement of biased times of flight (TOFs) of energy waves traveling between the vehicle and multiple stations at known locations.
A geofence can be dynamically generated (as in a radius around a point location) or match a predefined set of boundaries (such as school zones or neighborhood boundaries). The use of a geofence is called geofencing , and one example of use involves a location-aware device of a location-based service (LBS) user entering or exiting a geofence.
A ship designer can find the most extreme sea states (extreme values of H 1/3 and T 1) from the joint frequency table, and from the wave spectrum, the designer can find the most likely highest wave elevation in the most extreme sea states and predict the most likely highest loads on individual parts of the ship from the response amplitude ...
In Kamaishi, 4-metre (13 ft) waves surmounted the seawall – the world's largest, erected a few years ago in the city's harbor at a depth of 63 m (207 ft), a length of 2 km (1.2 mi) and a cost of $1.5 billion – and eventually submerged the city center.
Typically, annual boat maintenance costs about 10 percent of the cost of the boat itself. For example, a boat that cost $20,000 to purchase would cost roughly $2,000 a year to maintain. Examples ...
In 1990 the company developed C.A.T. fins, and by 1992 they had developed a computerized management system to monitor and control boats' features and performance. [6] In 1995 Centurion began manufacturing 'The Wave', a boat specifically designed to create large wakes for Wakeboarding and Wakesurfing.
This stage is called the transition stage and at this stage the rate of wave-making resistance is the highest. Once the hull gets over the hump of the bow wave, the rate of increase of the wave drag will start to reduce significantly. [1] The planing hull will rise up clearing its stern off the water and its trim will be high.
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