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.
Java is not enabled in the web browser. If Java is already installed but applets do not work, you need to enable Java through your web browser. SOLUTION. If you recently installed Java, you may need to restart your browser (close all browser windows and re-open), in order for the browser to recognize the installation. In addition, make sure Java content in the browser is enabled through the Java Control Panel.