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This talk will discuss normal forms and how they may be used to define invariants and classify homogeneous surfaces in R3 and more besides . ) How amazing to scan even the blurry , faded receipts clearly - - and then sort and categorize them for your expense accounting , as well as for tax purposes according to the form or line on the tax return where they 'll be used . Part of a larger collection of resources , this resource book presents evidence of the benefits of good communication with a detailed discussion of a dozen specific communication skills and how they may be used . Illustrations of what this sort of a model would look like and how it could be used in the context of each of the case studies described below . The underlying concepts , equations , and numerical methods for level set and partial differential equation ( PDE ) methods , and how they may be used in a variety of graphics applications , including image inpainting , pattern formation , 3D curve computation , 3D shape reconstruction , surface editing , image and shape morphing , and fire and water simulation . RIP is widely implemented on hosts , where it may be used as a method of router discovery , or for load-balancing and fault tolerance when multiple routers are on a subnet . The task of assisting and supporting academic staff in using learning technology becomes one of information management : providing appropriate and easy-to use information about what technologies are available , how they may be used , and crucially , how they have been evaluated for both cost and educational effectiveness . Opportunity for achieving a clear understanding of various media and how they may be used is a primary focus . Just as the various logos that appear on ATM cards tell you where they can be used to get cash or make banking transactions at ATMs , they also indicate where your card can be used to make purchases .