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\ No newline at end of file
diff --git a/revealjs/alternative_energy/index.html b/revealjs/alternative_energy/index.html
index c1f9504..c353be0 100644
--- a/revealjs/alternative_energy/index.html
+++ b/revealjs/alternative_energy/index.html
@@ -48,28 +48,29 @@
     </script>
   </head>
   <body>
-    <!-- VERY ugly hack for preloading, because larger videos sometimes hang
-         over „real“ internet (but work over local connection) -->
-    <!--<div class="preload">
-      <video class="preload" autoplay src="img/bigdata.mp4"></video>
-      <video class="preload" autoplay src="img/rsync.mp4"></video>
-    </div>-->
     <div class="reveal">
       <div class="slides">
         <section data-background-image="img/plasma.jpg">
           <h1>Alternative Energie</h1>
           <aside class="notes">
             <ul>
-              <li>Wer glaubt, dass beim Senden von einer E-Mail diese nur der Empfänger bekommt?</li>
+              <li>Nicht so häufig genutzt</li>
+              <li>Weil: Nachteile/Nicht Rentabel/Praktikabel/Nicht bekannt</li>
+              <li>Da manch außergewöhnlich: Kurze Einleitung zur Eintelung von Energiemengen</li>
             </ul>
           </aside>
         </section>
         <section>
-          <!--<section data-background-video="img/kardaschow.mp4" data-background-size="contain">-->
           <section data-background-image="img/kard-header.svg">
             <h1>Kardaschow-Skala</h1>
             <aside class="notes">
               <h3>→Simon</h3>
+              <ul>
+                <li>Nikolai Semjonowitsch Kardaschow 1963</li>
+                <li>Ziel: Klassifizierung Außerirdischer Zivilisationen</li>
+                <li>Auch für Einteilung von Möglichkeiten zur Stromerzeugung nützlich</li>
+                <li>Anhand nutzbarer Energie</li>
+              </ul>
             </aside>
           </section>
           <section>
@@ -100,7 +101,9 @@
             <aside class="notes">
               <ul>
                 <li>Forscher haben Skala erweitert; bis 3 ist von Kardaschow</li>
-                <li>Menschheit heute: Typ 0.72</li>
+                <li>3 Typen erklären</li>
+                <li>Komplette Energie von Erde, Stern, Galaxie</li>
+                <li>Ende von Typ 1: Menschheit heute: Typ 0.72</li>
               </ul>
             </aside>
           </section>
@@ -229,6 +232,20 @@
               </ul>
             </aside>
           </section>
+          <!--<section data-background-video="img/bio_abfall.mp4">
+            <aside class="notes">
+              <ul>
+              </ul>
+            </aside>
+          </section>
+          <section>
+            <h2>Ein bisschen Gas muss sein</h2>
+            <img src="http://m.memegen.com/5icx5c.jpg" alt="Unser großer Führer">
+            <aside class="notes">
+              <ul>
+              </ul>
+            </aside>-->
+          </section>
         </section>
         <section>
           <section>
@@ -244,7 +261,9 @@
             <aside class="notes">
               <h3>→Simon</h3>
               <ul>
-                <li>bzw. Hülle, Ring, Schwarm, Blase</li>
+                <li>Wohl unbekanntestes der 3 (weil nicht genutzt)</li>
+                <li>Freeman Dyson</li>
+                <li>Sphäre eigentlich falsch, mehr später</li>
               </ul>
             </aside>
           </section>
@@ -257,6 +276,7 @@
                 <li>Radius 1 AU (was ist AU)?</li>
                 <li>so groß, um Wirkungsgrad von bis zu 95% erreichen</li>
                 <li>Erde wäre am Rand</li>
+                <li>Infrarotstrahlung</li>
                 <li>Wie umsetzen?</li>
               </ul>
             </aside>
@@ -264,19 +284,17 @@
           <section>
             <h2>Probleme der Dyson-Hülle</h2>
             <ul>
-              <li>Implosion durch Sonnenanziehung</li>
-              <li>Verschiebung</li>
               <li>Oberfläche: 2.72·10<sup>17</sup> km<sup>2</sup></li>
               <li>Materialvolumen: 8.16·10<sup>14</sup> km<sup>3</sup></li>
               <li>Masse: ~ 4.43·10<sup>27</sup> kg</li>
             </ul>
             <aside class="notes">
               <ul>
-                <li>Impoision durch Gravitation des Sternes</li>
+                <li>Imploision durch Gravitation des Sternes</li>
                 <li>Verschiebung durch Aussetzung starker Kräfte</li>
                 <li>2.72·10<sup>17</sup> km² Oberfläche (~ 600 Mio. Erdoberfläche)</li>
-                <li>Bei 3m Dicke: 8.16·10<sup>14</sup> km³ Materialvolumen (über 600 Tsd. mal Oberflächenwasser der Erde)</li>
-                <li>Bei 5427 kg/m³ Dichte (Merkur): ~ 4.43·10<sup>27</sup> kg (über 320 mal Erdmasse)</li>
+                <li>Bei 3 m Dicke: 8.16·10<sup>14</sup> km³ Materialvolumen (über 600 Tsd. mal Oberflächenwasser der Erde)</li>
+                <li>Bei ~ 5400 kg/m³ Dichte (Merkur): ~ 4.43·10<sup>27</sup> kg (über 740 Erdmasse/2.3 Jupiter)</li>
                 <li>Ziemlich unmöglich</li>
               </ul>
             </aside>
@@ -287,12 +305,11 @@
               <ul>
                 <li>Originale Idee von Dyson</li>
                 <li>1960 als <em>Search for Artificial Stellar Sources of Infrared Radiation</em> in Zeitschrift <em>Science</em></li>
-                <li>Suche nach Außerirdischen</li>
-                <li>Unabhängige Kollektoren in Umlaufbahn</li>
-                <li>ca. 100k Objekte</li>
-                <li>ca. 1 Mio. km dick</li>
+                <li>Suche nach Außerirdischen (gezielt danach suchen, durch Wissen über Struktur)</li>
+                <li>ca. 100k Unabhängige Kollektoren in Umlaufbahn</li>
+                <li>ca. 1 Mio. km dick (nahezu 150tel von Radius der -Hülle)</li>
                 <li>kabellose Energieübertragung</li>
-                <li>wahrscheinlich beste Möglichkeit einer Dysons-Sphäre</li>
+                <li>wahrscheinlich beste Möglichkeit einer Dyson-Sphäre (Stück für Stück)</li>
               </ul>
             </aside>
           </section>
@@ -319,6 +336,42 @@
               </ul>
             </aside>
           </section>
+          <section data-background-image="img/smbh.svg" data-background-size="90vmin" data-background-color="white">
+            <h2>Spiegel um Schwarzes Loch</h2>
+            <aside class="notes">
+              <ul>
+                <li>Kurz zu Möglichkeit für Typ-3-Zivilisation</li>
+                <li>Hört sich nicht so an, aber einfacher zu bauen, weil kleiner</li>
+                <li>Material von Asteroid für Schwarzes Loch mit Sonnenmasse ausreichend</li>
+                <li>Aber: weiter weg</li>
+              </ul>
+            </aside>
+          </section>
+          <section data-background-image="img/penrose-process.svg" data-background-color="#fedd40">
+            <h2 style="display: none;">Penrose-Prozess</h2>
+            <aside class="notes">
+              <ul>
+                <li>Schwarzes Loch dreht sich</li>
+                <li>Ereignishorizont: weg; Ergosphäre: spezielle Eigenschaften aber nicht verloren</li>
+                <li>„füttern“ mit Masse (Asteroid/Müll)</li>
+                <li>„klauen“ Rotationsenergie</li>
+                <li>mehr Energie zurück als rein</li>
+              </ul>
+            </aside>
+          </section>
+          <section data-background-image="img/spiegel-drauf.svg">
+            <h2 style="display: none;">Verstärkung von Strahlen</h2>
+            <aside class="notes">
+              <ul>
+                <li>Verstärkung von Strahlen (superradiant scattering; Superstrahlenzerstreuung)</li>
+                <li>Benötigt Spiegel um Schwarzes Loch</li>
+                <li>(Am Bild Erklären)</li>
+                <li>Teil fältt durch den Ereignishorizont und ist (für uns) verloren</li>
+                <li>Größerer Teil: wird durch Ergosphäre verstärkt</li>
+                <li>Fazit: Noch nicht zu bewerkstelligen (v.a. weil zu weit weg)</li>
+              </ul>
+            </aside>
+          </section>
         </section>
         <section style="font-size: 24px;">
           <h1>Ende</h1>
@@ -360,7 +413,8 @@
             <tr>
               <td>
                 <ul>
-                  <li class="image">YouTube/Kurzgesagt (<a href="https://youtu.be/wWSJYr1Lr0E">wWSJYr1Lr0E</a>, <a href="https://youtu.be/ulCdoCfw-bY">ulCdoCfw-bY</a>)</li>
+                  <li class="image">YouTube/Kurzgesagt (<a href="https://youtu.be/wWSJYr1Lr0E">wWSJYr1Lr0E</a>)</li>
+                  <li class="imageplus">YouTube/Kurzgesagt (<a href="https://youtu.be/ulCdoCfw-bY">ulCdoCfw-bY</a>)</li>
                   <!--<li>Arχive.org: <a href="https://arxiv.org/abs/1112.5519">1112.5519 [physics.gen-ph]</a></li>-->
                   <li>Gizmodo: <a href="https://archive.fo/ZdXcc">How to build a Dyson sphere in five (relatively) easy steps</a></li>
                   <li>Daniel Tillet: <a href="https://www.tillett.info/2016/08/03/carnot-efficient-dyson-spheres-are-undetectable-by-infrared-surveys/">Carnot Efficient Dyson Spheres are Undetectable by Infrared Surveys</a></li>