quality of service (qos) is an important issue in the design and management of web service composition. qos in web services consists of various non-functional factors, such as execution cost, execution time, availability, successful execution rate, and security. in recent years, the number of available web services has proliferated, and then offered the same services increasingly. the same web ...

Since, most of the organizations present their services electronically, the number of functionally-equivalent web services is increasing as well as the number of users that employ those web services. Consequently, plenty of information is generated by the users and the web services that lead to the users be in trouble in finding their appropriate web services. Therefore, it is required to provi...

Quality of service (QoS) is an important issue in the design and management of web service composition. QoS in web services consists of various non-functional factors, such as execution cost, execution time, availability, successful execution rate, and security. In recent years, the number of available web services has proliferated, and then offered the same services increasingly. The same web ...

in this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. the engines are assumed to be implemented as composite web services. current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. the difficulty is to rollback the execution state of the workflo...

nowadays, world wide web has become a popular medium to search information, business, trading and so on. various organizations and companies are also employing the web in order to introduce their products or services around the world. therefore e-commerce or electronic commerce is formed. e-commerce is any type of business or commercial transaction that involves the transfer of information acro...

today, the scientific communications are developed and expanded on the internet and the famous world wide web service, and the popularity of the electronic scientific databases (esds) such as sciencedirect, google scholar, and scopus is an evidence of this claim. in addition to providing scientific contents, the esds offer researchers diverse scientific web services such as scientific communica...