web usage mining (wum) is the automatic discovering of hidden informationof user access pattern from the web log data. frequent pattern discovery is one ofthe main techniques in wum that can be used to implement recommender systems,forecast user`s navigational behaviour, and personalize web sites. many algorithmshave been suggested on obtaining frequent user navigation patterns. this paperprese...

introduction: consumers have referred to the web to learn how they can improve their health, prevent disease and learn details about specific diseases. while efforts are being made to monitor information found on the web especially with the emergence of her: electronic health record in iran, they are not enough to cover every web site with health information. as a result, it was decided to eval...

the study deals with the possibility of information loss in web 2.0 due to the interaction between the overload and the real information. using gottesman and preskill method, this investigation has proposed a mechanism to calculate the amount of information transformation in web 2.0. in this proposal, there are three different hilbert spaces that belong to the degrees of freedom of outside, ins...

Web 3.0 is the upcoming phase in web evolution. Web 3.0 will be about “feeding you the information that you want, when you want it” i.e. personalization of the web. In web 3.0 the basic principle is linking, integrating and analyzing data from various data sources into new information streams by means of semantic technology. So, we can say that Web 3.0 comprises of two platforms semantic techno...

particulate and gaseous emissions of pollutants from industries and auto-exhausts are responsible for rising discomfort, aggravates respiratory and cardiovascular. in this study, a system for air quality information in tehran city has been developed, using an online web-based geographic information system. this web-based gis application allows users to recognize areas with a potential increase ...