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" ... Given the limitations of EEG, signals recorded at the cortical surface or even deep inside the brain may eventually be more useful. While it’s an active topic of research, only a few patients have received cortical recording implants over the past decade. These experiments have been successful, in that paralyzed patients were able to control cursors and prosthetic arms just by thinking about the movement. For now, application in real clinical medicine is limited not just by the slow pace of R&D but by limitations of electrode technology. State-of-the-art intracranial microelectrodes that actually penetrate the cortex generally lose function after a few months. There is some evidence that larger electrodes at the surface of the brain will work almost as well, which offers hope for this technology to enter clinical practice sooner. ... "
" ... Google Docs is a free tool whereby multiple people can edit a document simultaneously. And not only that, but when multiple people are editing simultaneously, everyone can see each other's cursors and watch them type in real-time. If I've got ten people in my meeting, we'll see ten different cursors, each in a different color and with our name displayed right above where we're typing. ... "
" ... Most databases exist primarily to service a specific application. The schema (or data model) of that database will typically be set up to provide access optimally for a particular component - customers, for instance, or parts or products. The basis then of most such applications is the record, which is a view of information made from joining multiple tables together using keys. Because most "records" in this regard are actual composite structures, applications usually make use of cursors, which can be thought of as "You are Here" signs within the set of records. ... "