Evaluating Sliding and Sticky Target Policies by Measuring.pdfVIP

Evaluating Sliding and Sticky Target Policies by Measuring Temporal Drift in Acyclic Walks Through a Web Archive Scott G. Ainsworth Michael L. Nelson Old Dominion University Old Dominion University Norfolk, VA, USA Norfolk, VA, USA sainswor@ mln@ ABSTRACT 1. INTRODUCTION When a user views an archived page using the archive’s user To browse archived pages from a web archive such as the interface (UI), the user selects a datetime to view from a Internet Archive [19], the user begins with the selection of list. The archived web page, if available, is then displayed. a URI followed by selection of a Memento-Datetime (the From this display, the web archive UI attempts to simulate datetime the resource was archived). Following these selec- the web browsing experience by smoothly transitioning be- tions, the user is able to browse the archive’s collection of tween archived pages. During this process, the target date- mementos (archived copies) by clicking links on displayed time changes with each link followed; drifting away from pages; a process similar to browsing the live Web. However, the datetime originally selected. When browsing sparsely- with each click, the target datetime (the datetime requested archived pages, this nearly-silent drift can be many years by the user) is changed to the Memento-Datetime of the in just a few clicks. We conducted 200,000 acyc