Search Engines Essay -- essays research papers

thither be currently over a billion pages of information on the internet ab start every topic imaginable. The question is how can you mayhap find what you want? Computer algorithms can be written to face the Internet but most ar not practical because they moldiness sacrifice precision for coverage. However, a few locomotive engines have found arouse ways of providing high quality information quickly. Page value ranking, topic-specific look fores, and Meta look for engines ar three of the most popular because they work smarter not harder. musical composition no commercial search engine willing make world their algorithm, the basic structure can be inferred by testing the results. The modestness for this is because there would be a thousand imitation sites, meaning forgetful or no profit for the developers. The most primitive of searches is the sequential search, which goes by dint of every item in the list one at a time. up to now the sheer size of the web immediatel y rules out this possibility. while sequential might return the best results, you would most likely neer see any results because of the webs inflammatory product rate. evening the fastest computers would take a long time, and in that time, all kinds of refreshed pages will have been created.Some of the older spiders like Alta Vista are designed to literally roam randomly through the web utilize links to other pages. This is accomplished with high-speed servers with 300 connections open at one time. These web spiders are content based which means they rattling read and categorize the HTML on every page. One blot of this is the verbal-disagreement problem where you have a particular word that can pass two different concepts. Type a few words in the query and you will be lucky if you can find anything relates to what you are looking for. The query words can be anywhere in a page and they are likely to be taken out of context.Content-based searches can also be easily manipulat es. Some tactics are very deceptive, for example some automobile web sites have hunched to writing Buy This Car dozens of times in concealed fontsa subliminal version of listing AAAA Autos in the Yellow Pages(1). The rectitude is that one would never know if a site was doing this unless(prenominal) you looked at the mandate and most consumers do not look at the code. A less subtle tactic is to pay to get to the top. For example, the engine GoTo accepts payment from those who manage to b... ... meta search engine can achieve several advantages 1 It will present to users a more sophisticated interface2 raise the translation more accurate3 Get more transact and precise results4 Improve source selection and running anteriority decisions (3).Again the idea of optimizing the Internet through intelligent software shows up. It is still a matter of designing a certain algorithm that does not forget what it has learned.Most people did not foresee the tremendous growth of the Interne t in the 1990s. Computer algorithms have gone from small presidential term programs to every personal computer in the world. You start with the most basic problem solving and end up with the most complex of problem solving. That of course is sorting through a database that grows almost exponentially.Plain and simple, the Internet has a lot of information on it. A crawler plant life twenty-four hours a day digging through it all. The search engine pulls out the parts people want and hands it to the Meta search engine. The Meta search engine further discriminates until you get exactly what you are looking for. Yet behind all this are machines performing the instructions they have been give an algorithm.