Positioning system

MAPPscan - Acoustic Positioning system for Manual Ultrasonic Testing of Pipes and Components. 

MAPPscan is a manual ultrasonic testing system connected to an acoustic positioning system.. The system is developed as a consequence of the increased radiation doses in nuclear plants The system has the same flexibility as manual scanning with the same accuracy and the possibilties to collect, store and evaluate the UT data as with mechanised Ultrasonic systems The positioning system is based on spatial acoustic triangulation and have an accuracy of better than 1.0 mm within its recommended range. 

The positioning system is connected to a computer where the UT-signals are stored and presented together with parameters for positioning and UT-setup. 

The Calibration of the positioning system is carried out using a bar with a given distance which is placed between the referenspoint on the microphone collar and the probe. The distance is then entered into the acquisition software together with informations of the air temperature close to the tested object, pipe dimension, type of UT-probe (probe height) and scanning direction. 

Despite the forces of wind, waves and ocean currents, at a water depth of. S,000 ft (1,526 in), a dynamic positioning system can reliably keep a drill ship within 50 ft (15.2 m) of the spot directly over the borehole. 

A drillship (Figure 4-494) provides a drilling platform in waters up to 10,000 ft deep. The rig is kept on location by complex mooring and dynamic positioning systems requiring computer control. 

The real issue is in being asked. Like any classic cocktail, the sidecar, in this day and age, is at its greatest use as a Global Positioning System. If you find yourself in a place where they don t know the question, then they can t make the answer. 

Hofmann-Wellenhof, B., Lichtenegger, H. and Collins, J., 1992. Global Positioning System Theory and Practice, 2nd edn. Springer-Verlag. 

DGGE Water samples collected from eight sites of three different lake zones and the Global Positioning System Microbial community composition and relationship between bacterial community structure and environmental factors [147]... 

The field and any subportions of the field to be sampled must have specific unique labels. These labels are typically recorded in a field or laboratory notebook. The notebook will also contain their exact location using a global positioning system (GPS). The position of any samples taken in any part of the area is also recorded using its GPS location. This is the only way one can be certain were a sample was taken. Flags or other markers are always subject to being lost or moved. 

This example is offered for illustration only. Modern precision agriculture utilizes geographical positioning systems (GPS) for sampling and for determining fertilizer needs. See, for example, the following Web site http //edis.ifas.ufl.edu/BODY SS402 (as of April 22, 2002). 

More advanced applications of e-agriculture in farming exist in the use of sophisticated information and communication technologies such as satellite systems, Global Positioning Systems (GPS), and advanced computers and electronic systems to improve the quantity and quality of production (Food and Agriculture Organization of the United Nations 2005). 

A. Zavala-Rio, R. Femat, and G. Solis-Perales. Countercurrent double-pipe heat exchangers are a special type of positive systems. In First Multidisciplinary International Symposium on Positive Systems Theory and Applications (POSTA 2003), volume IEEE LNCIS 294, pages 385-392, Roma, Italy, August 2003. 

Though certain positive resist formulations that are commercially available have been shown to function satisfactorily under MUV exposure conditions in terms of the image quality that can be generated (77,72), none of these provides a throughput capability comparable to that obtainable under NUV conditions. IBM researchers have recently described the development of a resist designed specifically for exposure in the MUV spectral region (79). The resist is a two-component, positive system based on... 

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