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.
Launch for Java. Use Default Browser to Open a Web Page from a Swing Application. Launch the user's default browser and open a web page from a Java application with the code below. The above code uses the Desktop library introduced in Java 6, so it will not work with Java 5. However, the Bare Bones Browser Launch solution is designed to work on Java 5.