27: Working with Surfaces in .NET

Integration qr-codes in .NET 27: Working with Surfaces

The style attribute allows you to type any CSS declaration, and it will apply only to that tag. This isn t really that different from using HTML to format your document, so I don t recommend it. Save and reload your page; you should now see an orderly, well-designed form, as shown in Figure 5.15. Very smart! Figure 5.15 The completed form

Certificate subject (you) Certificate issuer Expiration date of the certificate Purpose of the certificate Friendly name Status Certificate template

(12.213)

Figure 39-9: Select a publisher and one of the subscriptions from the list. At this point, you must decide what kind of subscription to create. Select whether you wish to use pull subscriptions or push subscriptions. Use the following to decide: When you have many subscribers, use pull subscriptions. When you have subscribers who are not always connected, use pull subscriptions. If the preceding don t apply, use push subscriptions.

b)2 - 1.

MICROCALORIMETERS consequently small electronic heat capacity can be used with very good results. Among these bismuth is certainly the one that is receiving the highest attention and is giving the best results (Lindeman et al., 2002a; Wollman et al., 2000). For small absorbers, traditional metals like copper have also been used with very good results (Bergmann Tiest et al., 2002a). Semiconductors and insulators have no electronic contribution to the heat capacity, which can then be very small. However, part of the incident energy is converted rst into e-h pairs that can be very slow to recombine. It is therefore dif cult to have good energy resolution since the thermalization ef ciency is limited and is affected by the statistical and positional variation in the e-h pair creation and trapping. Some small or zero gap semiconductors such as HgTe can have very good performance due to the negligible energy tied up in charge carrier production (McCammon et al., 2002a; Stahle et al., 2002a). A promising alternative to metals and semiconductors are superconductors. Their heat capacity can be small due to the absence of an electronic contribution at temperatures below 0.1 TC , while the stopping power is very good for high Z materials like lead or rhenium. In superconductors the incident energy is rst converted into quasiparticles that then recombine releasing phonons. The details of this process are complicated and depend strongly on the characteristics of the material used (Cosulich et al., 1993). Superconductors as absorbers may sometimes be characterized by incomplete thermalization and very long tails in the pulses that affect the detector speed and energy resolution. The best results at low energy (below 10 keV) have been obtained using tin (Alessandrello et al., 1999; Silver et al., 2002), but promising results have also been obtained using rhenium (Galeazzi, 1998a). Recently, good high-energy ( 50 keV) results have also been obtained using lead (Bleile et al., 2002). In conclusion cryogenic microcalorimeters can obtain good results using a large variety of materials. The choice of the absorber can therefore be optimized depending on the requirements of the experiment.