General Discussions

Ontology

Definition: a set of concepts and categories in a subject area or domain that shows their properties and the relations between them. As defined in whatis.com: In general, ontology is the study or concern about what kinds of things exist – what entities there are in the universe. It derives from the Greek onto (being)… Continue reading Ontology

General Discussions

The Web for Tomorrow

Apprehending the web known so far, we have quite a few challenges in hand. With new technologies and tools being added to the web, they largely call for something to unify everything under a single umbrella. We have been inventing things to put everything together but in the process we have been diverging and getting… Continue reading The Web for Tomorrow

General Discussions

Harmonic Mean

Harmonic mean is expressed as the reciprocal of the arithmetic mean of the reciprocals of the given set of observations. Example: Harmonic Mean of numbers 1, 5, 9 is given by:   = 3 / 1.31 = 2.29 The generic formula for Harmonic mean of positive real numbers is give by: Harmonic mean of two numbers X and Y… Continue reading Harmonic Mean

General Discussions

Sloppy Recommendations

Read More at: See, Say, Market Recommendations Online shops have been hosted. What about recommendations? They have been lazy and sloppy.  There is no one to talk like old shop days and there is no way to display the shelves like in super markets. You just see what is required and browse over the various… Continue reading Sloppy Recommendations

General Discussions

Precision and Recall

Precision is the fraction of relevant instances among the retrieved instances. It’s asking the question: How many selected items are relevant? Recall is the fraction of relevant instances that have been retrieved over total relevant instances. It’s asking the question: How many relevant items are selected? Recall and Precision are inversely related. Example: On a… Continue reading Precision and Recall