diff --git a/.nojekyll b/.nojekyll
index 0403bfa..cd654cf 100644
--- a/.nojekyll
+++ b/.nojekyll
@@ -1 +1 @@
-667ff40b
\ No newline at end of file
+36e72a64
\ No newline at end of file
diff --git a/course/topics/topic_1_uas_basics/lectures/lecture_1a.html b/course/topics/topic_1_uas_basics/lectures/lecture_1a.html
index 927aa51..f8dff27 100644
--- a/course/topics/topic_1_uas_basics/lectures/lecture_1a.html
+++ b/course/topics/topic_1_uas_basics/lectures/lecture_1a.html
@@ -360,10 +360,10 @@ <h2>What is an UAV?</h2>
 <h2>UAS or UAV? Or maybe a drone?</h2>
 <div>
 <ul>
-<li class="fragment">UAV = Unmanned Aerial Vehicle</li>
-<li class="fragment">UAS = Unmanned Aerial Systems</li>
-<li class="fragment">Drone = Dynamic Remotely Operated Navigation Equipment</li>
-<li class="fragment">RPA = Remotely Piloted Aircraft</li>
+<li class="fragment"><strong>UAV</strong> = Unmanned Aerial Vehicle</li>
+<li class="fragment"><strong>UAS</strong> = Unmanned Aerial Systems</li>
+<li class="fragment"><strong>Drone</strong> = Dynamic Remotely Operated Navigation Equipment</li>
+<li class="fragment"><strong>RPA</strong> = Remotely Piloted Aircraft</li>
 </ul>
 </div>
 </section>
@@ -372,12 +372,13 @@ <h2>UAS: Unmanned Aircraft System</h2>
 <div class="columns">
 <!-- Left --><div class="column" style="width:40%;">
 <ul>
-<li>Unmanned = without a person onboard (operated by automatic or remote control)</li>
-<li>Aircraft = able to fly</li>
-<li>System = associated elements related to safe operations (may include control stations, control links, support equipment, payloads, flight termination systems, and launch recovery equipment)</li>
+<li><strong>Unmanned</strong> = without a person onboard (operated by automatic or remote control)</li>
+<li><strong>Aircraft</strong> = able to fly</li>
+<li><strong>System</strong> = associated elements related to safe operations (may include control stations, control links, support equipment, payloads, flight termination systems, and launch recovery equipment)</li>
 </ul>
 </div><!-- Right --><div class="column" style="width:60%;">
-<p><img data-src="../images/Pilot_data_UAV.webp"> Consists of three elements:</p>
+<p><img data-src="../images/Pilot_data_UAV.webp"></p>
+<p><strong>Consists of three elements:</strong></p>
 <ol type="1">
 <li>Unmanned Aircraft</li>
 <li>Control Station</li>
@@ -389,13 +390,11 @@ <h2>UAS: Unmanned Aircraft System</h2>
 <h2>UAS or UAV? Or maybe a drone?</h2>
 <div class="columns">
 <div class="column" style="width:50%;">
+<p><strong>Unmanned Aerial Vehicle (UAV)</strong></p>
 <ul>
-<li>UAV = Unmanned Aerial Vehicle
-<ul>
-<li>Excludes: missiles, weapons, or exploding warheads,</li>
-<li>Includes: all classes of airplanes, helicopters, airships, and powered-lift aircraft,</li>
-<li>Doesn’t include: traditional balloons, rockets, tethered aircraft, and un-powered gliders.</li>
-</ul></li>
+<li><strong>Excludes:</strong> missiles, weapons, or exploding warheads,</li>
+<li><strong>Includes:</strong> all classes of airplanes, helicopters, airships, and powered-lift aircraft,</li>
+<li><strong>Doesn’t include:</strong> traditional balloons, rockets, tethered aircraft, and un-powered gliders.</li>
 </ul>
 </div><div class="column" style="width:50%;">
 <p><img data-src="../images/uav_acronym.webp"></p>
@@ -471,16 +470,16 @@ <h2>Generic Unmanned Aircraft System</h2>
 <p><img data-src="../images/uas_general_scheme.webp"></p>
 </div></div>
 </section>
-<section id="sensors" class="slide level2">
+<section id="sensors" class="slide level2 center text-center">
 <h2>Sensors</h2>
 
 <img data-src="../images/uav_sensors.webp" class="r-stretch"></section>
-<section id="sensors-1" class="slide level2">
+<section id="sensors-1" class="slide level2 center text-center">
 <h2>Sensors</h2>
 
 <img data-src="../images/uav_sensors2.webp" class="r-stretch"></section>
-<section id="suas-sensors-for-mapping" class="slide level2">
-<h2>sUAS sensors for mapping</h2>
+<section id="uas-sensors-for-mapping" class="slide level2">
+<h2>UAS sensors for mapping</h2>
 <ul>
 <li>RGB cameras</li>
 <li>Infrared sensors</li>
@@ -512,7 +511,11 @@ <h2>Multispectral and hyperspectral cameras</h2>
 <li>Miniaturization is challenging in terms of optics and sensor calibration</li>
 <li>Weight, cost, data quality has improved; spectral bands, resolution need improvements</li>
 <li>Cameras with NIR band: agriculture and vegetation mapping (for NDVI)</li>
-<li>The more bands the more information, but also higher price of the sensor (multispectral - couple thousands, hyperspectral - tens of thousands $)</li>
+<li>The more bands the more information, but also higher price of the sensor
+<ul>
+<li>$$ multispectral - couple thousands</li>
+<li>$$$ hyperspectral - tens of thousands</li>
+</ul></li>
 </ul>
 </div><div class="column" style="width:40%;">
 <p><img data-src="../images/hyperspectral.webp"> <img data-src="../images/ndvi.webp"></p>
@@ -563,7 +566,7 @@ <h2>Sensor and platform integration</h2>
 <h2>Who uses UAS?</h2>
 <p>Types of UAV Operations</p>
 </section>
-<section id="types-of-uas-operations" class="slide level2">
+<section id="types-of-uas-operations" class="slide level2 smaller">
 <h2>Types of UAS Operations</h2>
 <ul>
 <li><p><strong>Public Operations</strong><br>
@@ -616,11 +619,10 @@ <h2>Know before you fly</h2>
 <h2>What are UAS used for?</h2>
 </section>
 <section id="army-and-government" class="slide level2 smaller text-center">
-<h2>Army and government</h2>
+<h2>Army and Government</h2>
 <div class="columns">
 <div class="column">
-<ul>
-<li>Public Use Aircraft
+<!-- - Public Use Aircraft -->
 <ul>
 <li>Department of Agriculture</li>
 <li>Department of Commerce</li>
@@ -633,7 +635,6 @@ <h2>Army and government</h2>
 <li>NOAA</li>
 <li>State Universities</li>
 <li>State Law Enforcement</li>
-</ul></li>
 </ul>
 </div><div class="column">
 <div class="quarto-figure quarto-figure-center">
@@ -649,15 +650,15 @@ <h2>Civilian Application Fields</h2>
 
 <img data-src="../images/drones_industry.webp" class="r-stretch"></section>
 <section id="application-examples-1" class="slide level2 smaller">
-<h2>Application examples (1)</h2>
+<h2>Application Examples (1)</h2>
 <div class="columns">
 <div class="column" style="width:60%;">
 <ul>
-<li>Agriculture:
+<li><strong>Agriculture:</strong>
 <ul>
 <li>UAS equipped with fertilizer and pesticide dispersing equipment can be used to spray over large fields;</li>
 </ul></li>
-<li>Telecommunications:
+<li><strong>Telecommunications:</strong>
 <ul>
 <li>As mobile relay platforms, e.g., in disaster zones for emergency telecommunications</li>
 </ul></li>
@@ -666,16 +667,16 @@ <h2>Application examples (1)</h2>
 <p><img data-src="../images/use_examples_1.webp"></p>
 </div></div>
 </section>
-<section id="application-examples-2" class="slide level2">
-<h2>Application examples (2)</h2>
+<section id="application-examples-2" class="slide level2 smaller">
+<h2>Application Examples (2)</h2>
 <div class="columns">
 <div class="column" style="width:60%;">
 <ul>
-<li>News broadcasting:
+<li><strong>News Broadcasting:</strong>
 <ul>
 <li>In providing aerial video feeds for news events;</li>
 </ul></li>
-<li>Air traffic Control and ground traffic control:
+<li><strong>Air Traffic Control and Ground Traffic Control:</strong>
 <ul>
 <li>To monitor traffic and accidents over highways and streets, capture violation of traffic rules;</li>
 </ul></li>
@@ -684,17 +685,17 @@ <h2>Application examples (2)</h2>
 <p><img data-src="../images/use_examples_2a.webp"></p>
 </div></div>
 </section>
-<section id="application-examples-3" class="slide level2">
-<h2>Application examples (3)</h2>
+<section id="application-examples-3" class="slide level2 smaller">
+<h2>Application Examples (3)</h2>
 <div class="columns">
 <div class="column" style="width:60%;">
 <ul>
-<li>Mineral exploration:
+<li><strong>Mineral Exploration:</strong>
 <ul>
 <li>In aerial survey, to find minerals in hard-to-reach regions;</li>
 <li>In existing mines, to map extracted material volumes;</li>
 </ul></li>
-<li>Coastal monitoring:
+<li><strong>Coastal Monitoring:</strong>
 <ul>
 <li>Mapping dynamic shorelines and post-storm assessment</li>
 </ul></li>
@@ -708,11 +709,11 @@ <h2>UAS for Remote Sensing (1)</h2>
 <div class="columns">
 <div class="column" style="width:60%;">
 <ul>
-<li>Agriculture and environment:
+<li><strong>Agriculture and Environment:</strong>
 <ul>
 <li>Crop monitoring, vegetation mapping, forest fire monitoring, animals detection;</li>
 </ul></li>
-<li>Intelligence, surveillance, and reconnaissance:
+<li><strong>Intelligence, Surveillance, and Reconnaissance:</strong>
 <ul>
 <li>Detection of lost persons in difficult-to-access situations, support fire brigades in real-time crisis management, rapid disaster management;</li>
 </ul></li>
@@ -721,16 +722,16 @@ <h2>UAS for Remote Sensing (1)</h2>
 <p><img data-src="../images/remote_sensing_uas1.webp"></p>
 </div></div>
 </section>
-<section id="uas-for-remote-sensing-2" class="slide level2">
+<section id="uas-for-remote-sensing-2" class="slide level2 smaller">
 <h2>UAS for Remote Sensing (2)</h2>
 <div class="columns">
 <div class="column" style="width:60%;">
 <ul>
-<li>Aerial monitoring in engineering:
+<li><strong>Aerial Monitoring in Engineering:</strong>
 <ul>
 <li>Infrastructure inspections, distributed wind measurement, landslide monitoring;</li>
 </ul></li>
-<li>Cultural heritage:
+<li><strong>Cultural Heritage:</strong>
 <ul>
 <li>Orthophotos of archaeological sites, 3D models of man-made structures;</li>
 </ul></li>
@@ -739,12 +740,12 @@ <h2>UAS for Remote Sensing (2)</h2>
 <p><img data-src="../images/remote_sensing_uas2.webp"></p>
 </div></div>
 </section>
-<section id="uas-for-remote-sensing-3" class="slide level2">
+<section id="uas-for-remote-sensing-3" class="slide level2 smaller">
 <h2>UAS for Remote Sensing (3)</h2>
 <div class="columns">
 <div class="column" style="width:60%;">
 <ul>
-<li>General surveying, mapping, and photogrammetry, cadastral applications:
+<li><strong>General surveying, mapping, and photogrammetry, cadastral applications:</strong>
 <ul>
 <li>Cadastral surveying, alternative to traditional surveying, high-precision parcel boundary determination;</li>
 </ul></li>
@@ -766,10 +767,10 @@ <h2>Why should you know how to use UAS?</h2>
 <section id="barriers" class="slide level2">
 <h2>Barriers</h2>
 <ul>
-<li>constantly changing legislation and regulations,</li>
-<li>political and societal acceptance,</li>
-<li>… what do you consider a barrier in UAS development? What obstacles do you see for yourself as a potential UAS user?</li>
+<li>Constantly changing legislation and regulations</li>
+<li>Political and societal acceptance</li>
 </ul>
+<p><em>… what do you consider a barrier in UAS development? What obstacles do you see for yourself as a potential UAS user?</em></p>
 
 <div class="quarto-auto-generated-content">
 <div class="footer footer-default">
diff --git a/search.json b/search.json
index 206bf04..964b090 100644
--- a/search.json
+++ b/search.json
@@ -130,14 +130,14 @@
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     "title": "Introduction to UAS",
     "section": "UAS: Unmanned Aircraft System",
-    "text": "UAS: Unmanned Aircraft System\n\n\n\nUnmanned = without a person onboard (operated by automatic or remote control)\nAircraft = able to fly\nSystem = associated elements related to safe operations (may include control stations, control links, support equipment, payloads, flight termination systems, and launch recovery equipment)\n\n\n Consists of three elements:\n\nUnmanned Aircraft\nControl Station\nData Link"
+    "text": "UAS: Unmanned Aircraft System\n\n\n\nUnmanned = without a person onboard (operated by automatic or remote control)\nAircraft = able to fly\nSystem = associated elements related to safe operations (may include control stations, control links, support equipment, payloads, flight termination systems, and launch recovery equipment)\n\n\n\nConsists of three elements:\n\nUnmanned Aircraft\nControl Station\nData Link"
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     "title": "Introduction to UAS",
     "section": "UAS or UAV? Or maybe a drone?",
-    "text": "UAS or UAV? Or maybe a drone?\n\n\n\nUAV = Unmanned Aerial Vehicle\n\nExcludes: missiles, weapons, or exploding warheads,\nIncludes: all classes of airplanes, helicopters, airships, and powered-lift aircraft,\nDoesn’t include: traditional balloons, rockets, tethered aircraft, and un-powered gliders.\n\n\n\n\n\n\n\nMore about terminology in the article: Don’t use the ‘D’ Word: They’re ‘UAVs’ or ‘RPAs’ But Definitely Not ‘Drones’"
+    "text": "UAS or UAV? Or maybe a drone?\n\n\nUnmanned Aerial Vehicle (UAV)\n\nExcludes: missiles, weapons, or exploding warheads,\nIncludes: all classes of airplanes, helicopters, airships, and powered-lift aircraft,\nDoesn’t include: traditional balloons, rockets, tethered aircraft, and un-powered gliders.\n\n\n\n\n\n\nMore about terminology in the article: Don’t use the ‘D’ Word: They’re ‘UAVs’ or ‘RPAs’ But Definitely Not ‘Drones’"
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@@ -203,11 +203,11 @@
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-    "href": "course/topics/topic_1_uas_basics/lectures/lecture_1a.html#suas-sensors-for-mapping",
+    "objectID": "course/topics/topic_1_uas_basics/lectures/lecture_1a.html#uas-sensors-for-mapping",
+    "href": "course/topics/topic_1_uas_basics/lectures/lecture_1a.html#uas-sensors-for-mapping",
     "title": "Introduction to UAS",
-    "section": "sUAS sensors for mapping",
-    "text": "sUAS sensors for mapping\n\nRGB cameras\nInfrared sensors\nMultispectral and hyperspectral sensors\nLaser scanners\nThermal sensors"
+    "section": "UAS sensors for mapping",
+    "text": "UAS sensors for mapping\n\nRGB cameras\nInfrared sensors\nMultispectral and hyperspectral sensors\nLaser scanners\nThermal sensors"
   },
   {
     "objectID": "course/topics/topic_1_uas_basics/lectures/lecture_1a.html#rgb-natural-color-cameras",
@@ -221,7 +221,7 @@
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     "title": "Introduction to UAS",
     "section": "Multispectral and hyperspectral cameras",
-    "text": "Multispectral and hyperspectral cameras\n\n\n\nMiniaturization is challenging in terms of optics and sensor calibration\nWeight, cost, data quality has improved; spectral bands, resolution need improvements\nCameras with NIR band: agriculture and vegetation mapping (for NDVI)\nThe more bands the more information, but also higher price of the sensor (multispectral - couple thousands, hyperspectral - tens of thousands $)"
+    "text": "Multispectral and hyperspectral cameras\n\n\n\nMiniaturization is challenging in terms of optics and sensor calibration\nWeight, cost, data quality has improved; spectral bands, resolution need improvements\nCameras with NIR band: agriculture and vegetation mapping (for NDVI)\nThe more bands the more information, but also higher price of the sensor\n\n$$ multispectral - couple thousands\n$$$ hyperspectral - tens of thousands"
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     "title": "Introduction to UAS",
-    "section": "Army and government",
-    "text": "Army and government\n\n\n\nPublic Use Aircraft\n\nDepartment of Agriculture\nDepartment of Commerce\nDepartment of Defence\nDepartment of Energy\nDepartment of Homeland Security\nDepartment of Interior\nDepartment of Justice\nNASA\nNOAA\nState Universities\nState Law Enforcement\n\n\n\n\n\n\nMilitary Use"
+    "section": "Army and Government",
+    "text": "Army and Government\n\n\n\n\nDepartment of Agriculture\nDepartment of Commerce\nDepartment of Defence\nDepartment of Energy\nDepartment of Homeland Security\nDepartment of Interior\nDepartment of Justice\nNASA\nNOAA\nState Universities\nState Law Enforcement\n\n\n\n\n\nMilitary Use"
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     "title": "Introduction to UAS",
-    "section": "Application examples (1)",
-    "text": "Application examples (1)\n\n\n\nAgriculture:\n\nUAS equipped with fertilizer and pesticide dispersing equipment can be used to spray over large fields;\n\nTelecommunications:\n\nAs mobile relay platforms, e.g., in disaster zones for emergency telecommunications"
+    "section": "Application Examples (1)",
+    "text": "Application Examples (1)\n\n\n\nAgriculture:\n\nUAS equipped with fertilizer and pesticide dispersing equipment can be used to spray over large fields;\n\nTelecommunications:\n\nAs mobile relay platforms, e.g., in disaster zones for emergency telecommunications"
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     "title": "Introduction to UAS",
-    "section": "Application examples (2)",
-    "text": "Application examples (2)\n\n\n\nNews broadcasting:\n\nIn providing aerial video feeds for news events;\n\nAir traffic Control and ground traffic control:\n\nTo monitor traffic and accidents over highways and streets, capture violation of traffic rules;"
+    "section": "Application Examples (2)",
+    "text": "Application Examples (2)\n\n\n\nNews Broadcasting:\n\nIn providing aerial video feeds for news events;\n\nAir Traffic Control and Ground Traffic Control:\n\nTo monitor traffic and accidents over highways and streets, capture violation of traffic rules;"
   },
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     "title": "Introduction to UAS",
-    "section": "Application examples (3)",
-    "text": "Application examples (3)\n\n\n\nMineral exploration:\n\nIn aerial survey, to find minerals in hard-to-reach regions;\nIn existing mines, to map extracted material volumes;\n\nCoastal monitoring:\n\nMapping dynamic shorelines and post-storm assessment"
+    "section": "Application Examples (3)",
+    "text": "Application Examples (3)\n\n\n\nMineral Exploration:\n\nIn aerial survey, to find minerals in hard-to-reach regions;\nIn existing mines, to map extracted material volumes;\n\nCoastal Monitoring:\n\nMapping dynamic shorelines and post-storm assessment"
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     "title": "Introduction to UAS",
     "section": "UAS for Remote Sensing (1)",
-    "text": "UAS for Remote Sensing (1)\n\n\n\nAgriculture and environment:\n\nCrop monitoring, vegetation mapping, forest fire monitoring, animals detection;\n\nIntelligence, surveillance, and reconnaissance:\n\nDetection of lost persons in difficult-to-access situations, support fire brigades in real-time crisis management, rapid disaster management;"
+    "text": "UAS for Remote Sensing (1)\n\n\n\nAgriculture and Environment:\n\nCrop monitoring, vegetation mapping, forest fire monitoring, animals detection;\n\nIntelligence, Surveillance, and Reconnaissance:\n\nDetection of lost persons in difficult-to-access situations, support fire brigades in real-time crisis management, rapid disaster management;"
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     "title": "Introduction to UAS",
     "section": "UAS for Remote Sensing (2)",
-    "text": "UAS for Remote Sensing (2)\n\n\n\nAerial monitoring in engineering:\n\nInfrastructure inspections, distributed wind measurement, landslide monitoring;\n\nCultural heritage:\n\nOrthophotos of archaeological sites, 3D models of man-made structures;"
+    "text": "UAS for Remote Sensing (2)\n\n\n\nAerial Monitoring in Engineering:\n\nInfrastructure inspections, distributed wind measurement, landslide monitoring;\n\nCultural Heritage:\n\nOrthophotos of archaeological sites, 3D models of man-made structures;"
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-    "text": "Barriers\n\nconstantly changing legislation and regulations,\npolitical and societal acceptance,\n… what do you consider a barrier in UAS development? What obstacles do you see for yourself as a potential UAS user?"
+    "text": "Barriers\n\nConstantly changing legislation and regulations\nPolitical and societal acceptance\n\n… what do you consider a barrier in UAS development? What obstacles do you see for yourself as a potential UAS user?"
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index 21471c3..b095285 100644
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