WWW/Internet - Portal do Software Público Brasileiro

ISBN: 978-972-8939-25-0 © 2010 IADIS2. DESIGN OF LOW-COST WEB BASED TILED DISPLAY WALL2.1 OverviewFigure 1 presents our tiled display wall named Wall Display in Mosaic (WDiM). The WDiM system consistsof 16 Full HD (1920 × 1080) LCD monitors and 16 ”Nettop” PCs(The Player) which have Atom (IntelCorp.) processors. Consequently, the system is very simple because one PC connects to one LCD monitor. Inaddition, WDiM has a game console (The Conductor, Wii; Nintendo Co. Ltd.) as the user interface for webapplication on the WDiM, and a web server (The Coordinator) to conduct monitor synchronization 1 . That is,WDiM is a distributed model-view-controller model that consists of the Coordinator, the Players, and theConductor.An overview of WDiM is presented in Figure 2. Each Player, Coordinator, and Conductor is connectedvia LAN and connects to the internet through the gate-way. Therefore, WDiM can access to the third partyweb services and contents on the internet. An external machine, e.g. a cellular telephone, can access toWDiM via the internet.The feature of WDiM is in comparison with the existing tiled display walls that the rendering engine isbuilt on a web browser. The Players display web browser, which is Kiosk Mode. Kiosk Mode isfundamentally a full screen mode with no toolbars. For example, Internet Explorer in the Kiosk Mode isavailable with -k as a command line argument when starting up Internet Explorer.The Players are fundamentally computers with simple factory settings be-cause a web browser is preinstalledon a new computer; no extra program is necessary to build WDiM, the tiled display wall system.The Players must be equal to the number of LCD Panels. Consequently, the installation cost of thePlayers might be the single largest component of the WDiM construction cost. For that reason, we mustspecifically examine reduction of the installation cost of Players. In fact, no application aside from a webbrowser is needed for PlayersThe Conductor is a web browser too. For this implementation, we choose Wii (Nintendo), which has anOpera web browser (Opera Software ASA) as Conductor. The Wii is a home video game console; anintuitive control is available -- the Wii Remote.The Coordinator is a simple web server; we use Apache2 HTTP daemon on Fedora Linux distribution(Red Hat Inc.).2.2 HardwareThe WDiM system consists of low-end consumer-grade computers. Players are Aspire Revo (Acer Inc.)which has Atom processors (Intel Corp.) and NVIDIA Ion graphics processors (NVIDIA Corp.). The AspireRevo performance is worse than that of ordinary computers because the Atom processor (Intel) is designedFigure 1. Wall Display in MosaicFigure 2. Overview of WDiM1 See http://www.youtube.com/watch?v=XYGCTgrySIc152