Several UI embeeded into one static html page

I have one vaadin 7 application with two UIs:

@SuppressWarnings("serial")
@Theme("app")
@Push
public class AppUI extends UI {

    @WebServlet(value = "/*", asyncSupported = true)
    @VaadinServletConfiguration(productionMode = false, ui = AppUI.class)
    public static class Servlet extends VaadinServlet {
    }
...
}
@SuppressWarnings("serial")
@Theme("app")
@Push
public class AuxUI extends UI {

    @WebServlet(value = "/aux/*", asyncSupported = true)
    @VaadinServletConfiguration(productionMode = false, ui = AuxUI.class)
    public static class Servlet extends VaadinServlet {
    }
...
}

I embeeded them into one static page:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=10;chrome=1" />
<link rel="shortcut icon" type="image/vnd.microsoft.icon"
    href="/vaadin7app/VAADIN/themes/app/favicon.ico" />
<link rel="icon" type="image/vnd.microsoft.icon"
    href="/vaadin7app/VAADIN/themes/app/favicon.ico" />
</head> 
<body>
    <p>Here is title</p>
    <div id="vaadin7app1" class=" v-app app" >
        <div class=" v-app-loading"></div>
        <noscript>You have to enable javascript in your browser to
            use an application built with Vaadin.</noscript>
    </div>
    <p>Here is separator</p>
    <div id="vaadin7app2" class=" v-app app" >
        <div class=" v-app-loading"></div>
        <noscript>You have to enable javascript in your browser to
            use an application built with Vaadin.</noscript>
    </div>
    <p>Here is footer</p>
    
    <iframe tabindex="-1" id="__gwt_historyFrame"
        style="position: absolute; width: 0; height: 0; border: 0; overflow: hidden"
        src="javascript:false"></iframe>
    <script type="text/javascript"
        src="/vaadin7app/VAADIN/vaadinBootstrap.js"></script>
    <script type="text/javascript">//<![CDATA[
        if (!window.vaadin) alert("Failed to load the bootstrap javascript: /vaadin7app/VAADIN/vaadinBootstrap.js");
        if (typeof window.__gwtStatsEvent != 'function') {
        vaadin.gwtStatsEvents = [];
        window.__gwtStatsEvent = function(event) {vaadin.gwtStatsEvents.push(event); return true;};
        }
        vaadin.initApplication("vaadin7app1",{
            "browserDetailsUrl": "/vaadin7app/",
            "serviceUrl": "/vaadin7app/",
            "widgetset": "com.vaadin.DefaultWidgetSet",
            "vaadinDir": "/vaadin7app/VAADIN/",
            "theme": "app",
            "debug": true,
            "heartbeatInterval": 300,
            "standalone": false,
            "authErrMsg": {
                "caption": "Authentication problem",
                "message": "Take note of any unsaved data, and <u>click here<\/u> to continue."
            },
            "comErrMsg": {
                "caption": "Communication problem",
                "message": "Take note of any unsaved data, and <u>click here<\/u> to continue."
            },
            "sessExpMsg": {
                "caption": "Session Expired",
                "message": "Take note of any unsaved data, and <u>click here<\/u> to continue."
            },
            "versionInfo": {"vaadinVersion": "7.1.8"}
        });
        vaadin.initApplication("vaadin7app2",{
            "browserDetailsUrl": "/vaadin7app/aux/",
            "serviceUrl": "/vaadin7app/aux/",
            "widgetset": "com.vaadin.DefaultWidgetSet",
            "vaadinDir": "/vaadin7app/VAADIN/",
            "theme": "app",
            "debug": true,
            "heartbeatInterval": 300,
            "standalone": false,
            "authErrMsg": {
                "caption": "Authentication problem",
                "message": "Take note of any unsaved data, and <u>click here<\/u> to continue."
            },
            "comErrMsg": {
                "caption": "Communication problem",
                "message": "Take note of any unsaved data, and <u>click here<\/u> to continue."
            },
            "sessExpMsg": {
                "caption": "Session Expired",
                "message": "Take note of any unsaved data, and <u>click here<\/u> to continue."
            },
            "versionInfo": {"vaadinVersion": "7.1.8"}
        });
//]]></script>
</body>
</html>

Is there way to get reference to the one UI from the two UI on server side? I want to influence on the one UI’s state from another UI.

Thanks in advanced!