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Finding, Filtering, Sorting  «Prev  Next»
Lesson 2 Finding data in a table
Objective Use the Find and Replace dialog box.
Sometimes you just need to find a particular piece of data within a table, perhaps you remember the name and need to find the address. The Find and Replace dialog box is the perfect solution because it allows you to search for one piece of data within one table.
To use the Find and Replace dialog box you need to know which table the data you are looking for is in. Open that table before you begin your search.
The following simulation shows you how to use the Find and Replace dialog box to find the data you are looking for.
finding Data in Table
In the next lesson you will learn how to sort records in a table.


How the brain works

This is how the brain works. Each neuron receives inputs from other neurons and a few of the neurons receive inputs from the receptors.
This consists of a large number of neurons, but only a small fraction of them. The neurons communicate with each other within in the cortex by sending these spikes of activity. The effective input line on a neuron is controlled by synaptic weight, which can be positive or negative. These synaptic weights adapt, and through adaptation, the weights enable the whole network to learn and to perform different kinds of computation. Examples of this are recognizing objects, understanding language, making plans, controlling the movements of your body. You have about ten to the eleven neurons, each of which has about ten to the four weights.
So you probably 10^15 (ten to the fifteen) or maybe only about 10^14 (ten to the fourteen) synaptic weights in your cerebral cortex. A huge number of these weights, quite a large fraction of them, can affect the ongoing computation in a very small fraction of a second, that is a few milliseconds. That is much better bandwidth to store knowledge than even a modern workstation has.