Reversed Mirror

The contrast mechanisms for bones and teeth are quite different from those for biological cells and soft tissues (Bereiter-Hahn 1995), which can sometimes be enhanced by phase contrast (Grill et al. 1996). Some of the principles of acoustic microscopy can be applied to high-frequency medical imaging (Lethiecq et al. 1996). It may even be possible to compensate for geometric distortions by using time reversal mirrors (Fink and Prada 1996). 

Fink, M. and Prada, C. (1996). Ultrasonic focusing with time reversal mirrors. In Advances in acoustic microscopy, Vol. 2 (ed. G. A. D. Briggs and W. Arnold), pp. 219-51. Plenum Press, New York. [197]... 

Ultrafast time reversal mirror at 800 nm based on photosensitive naphthalocyanine doped solids... 

A fixed-ring, field-reversed-mirror (here FRC) pilot reactor has been considered by G. Carlson et al., >9>l and is shown in Fig. 2. For the reactor, a single DT ring would be maintained by injection of 200 keV neutral beams. Using the... 

Fig. 2 Schematic of a fixed-ring, field-reversed-mirror pilot reactor.SO...

A. C. Smith et al., 0 have considered a prototype moving-ring, field-reversed-mirror reactor shown in Fig. 4 and summarized in Table 7. Plasma rings are formed with a magnetized, coaxial, plasma gun and compressed in 2-5 msec from R = 150 cm, Ti = 3 keV to R = 30 cm, T = 75 keV. In order to achieve ignition, S = 16 was considered. A 0-D numerical model was used to calculate the burn history. To make the... 

Table 7. Moving-Ring, Field-Reversed-Mirror, Prototype Reactor Parameters ...

Fig. 7 Plasma radius R, and S parameter vs time for the moving-ring, field-reversed-mirror reactor. ...

Reversed Mirror Reactor," Lawrence Livermore National Laboratory, Report UCRL-52467. 

J. H. Fink, J. D. Myall, W. S. Neef, and A. C. Smith, Jr., Conceptual Design of the Field-Reversed Mirror Reactor, Lawrence Livermore Laboratory Report UCRL-54267 (1978). 

In satellite studies at 111inois[32-35] the Field-Reversed Mirror (FRM) was selected for a detailed examination because it offers the potential of small size (order of 10 MW per unit) while stacking of units could increase gross powers to 100 MW or more.[36]... 

Figure 5. Sketch of SAFFIRE, a D- He fueled satellite concept using field-reversed mirror FRM confinement which allows small size modular units. A long (quasi-steady-state) burn is obtained with refueling and FRM plasmoids are generated by a conical pinch and heated to ignition by neutral beam injection. An energy convertor on the pinch end (not shown) is also required.

Odd function If a function x t) can be characterized as being a reverse mirror image of itself horizontally about the origin, it is described as an odd function. Mathematically, this demands that x t) = —x(—t) for all t. The name arises from the standard example of an odd function as a polynomial containing only odd powers of the independent variable. A pure sine is also an odd function. 

The D- and L-monosaccharides have reversed, mirror image configurations at every chiral center. 

Arrays can also be used in a self-adaptive imaging mode called time-reversal mirrors. First, a single impulse is transmitted simultaneously from all the elements in an array and the same elements are used for receiving. Then the received signals are simply time-reversed and retransmitted from the same elements. The elements are... 

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