They make up the cardiac pacemaker, that is, the natural pacemaker of the heart. In most humans, the concentration of pacemaker cells in the sinoatrial (SA) node is the natural pacemaker, and the resultant rhythm is a sinus rhythm. Sometimes an ectopic pacemaker sets the pace, if the SA node is damaged or if the electrical conduction system of the heart has problems.
Lobo is an extensible all-Java web browser and RIA platform. It supports HTML 4, Javascript (AJAX) and CSS 2 plus direct JavaFX and Java (Swing/AWT) rendering. Cobra is the web browser's renderer API; also a Javascript-aware HTML parser.
However, you must install it from java.com, because some malware pretends to be Java update 11. Only install Java in a single web browser, and use this browser only for Java sites. For example, if you normally browse the web with IE or Chrome, install the Java plug-in in Firefox or Opera, or vice versa. Java is being attacked, and restricting it to one browser minimises the attack surface.