Archive for June, 2008:
Latent Semantic Indexing Defined
Latent semantic indexing, by definition, is a mathematical or statistical technique for extracting and representing the similarity of meaning of words and passages by analysis of large bodies of text.
The definition may be a little difficult to understand, but basically latent semantic indexing takes the keywords you put into your search engine and go through each and every web page searching out the best results for the key words you are seeking.
There are several different mappings for latent semantic indexing from high dimensional to low dimensional spaces.
LSI chooses the optimal mapping in a sense that minimizes the distance. Choosing the number of dimensions is a unique problem. A reduction can remove
much of the noise while keeping too few dimensions may lose important information.
LSI performance is improved considerably after ten to twenty dimensions and peaks at seventy to one hundred dimensions. Then it slowly begins to diminish again. There is a pattern of performance that is observed with other datasets as well.
Latent semantic indexing considers pages that have many words in common and close in meaning, sorts them out, and presents them to the seeker.
The result is an LSI indexed database with similarity and values that are calculated for every content word and phrase. In response to a query, the LSI database returns the pages it sees fit best to the keywords.
The algorithm doesn’t understand anything about what the words mean and does not require an exact match to return results that are useful to the seeker.
Tags: latent semantic indexing, seo
Social Bookmarking for Blog Advertising
Social bookmarking sites are a growing trend and are becoming more popular each and every day. They are a great place to share your bookmarks with everyone and to be able to access them from any computer. They are also a great place that you can post a link to your blog.
There are over fifty social bookmarking sites that you use to submit your link to your blog. Digg, Digo, Blue Dot, and del.ico.us are just a few of them that are
the most popular. Each site has its own guidelines and rules for posting links, so it’s important that you want to read the rules that they have before you post
any links.
Because social bookmarking isn’t as targeted as other forms of advertising for your blog, you may find thta it will take longer for it to be effective. But it’s also a good way for you to get your blog noticed and it may bring in people who may not have found your blog another way.
Since social bookmarking doesn’t always give you the opportunity to know who it is that has seen your site, or get to know other people, it’s always a good idea to keep track of the visitors who say they were linked to your site through a bookmarking site. If the site allows you to put a comment, ask people to let you know on your blog that they found it through a social bookmarking site and which one. That will help you know how effective it is.
Tags: blog advertising, social bookmarking
