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Yet , we accept fingerprint comparisons as positive proof of identity . On the other hand , local changes may be large and observable by simple differencing of " before " and " after " DEMs . The Government will give consideration to utilizing private finance initiatives for central office buildings including integration with and new construction of central government office buildings with private-sector institutions . Figure 8.2 summarizes these concepts , along with applications achievable by simple differencing of DEMs . France , December 22 , 2006 - ESI Group , a pioneer and world-leading provider of digital simulation software , based on the physics of materials , federates its multi-disciplinary solvers technology in the Visual Environment platform , available on Windows 64-bit operating systems .