Update author info and add recent papers section

Updated Henning Ulfarsson's position and department in the author profile. Added a 'Recent Papers' section to the homepage, displaying the three most recent papers with title, journal, date, authors, and a short preview.

Author: ulfarsson

Gemfile.lock

@@ -102,4 +102,4 @@ DEPENDENCIES
   webrick (~> 1.7)
 
 BUNDLED WITH
-   2.7.2
+   2.7.2

_authors/ulfarsson.md

@@ -3,9 +3,9 @@ status: member
 short_name: ulfarsson
 first_name: Henning
 name: Henning Ulfarsson
-position: Assistant Professor, Reykjavik University
+position: Associate Professor, Reykjavik University
 ---
-Henning is an assistant Professor in the [School of Computer Science](https://en.ru.is/scs/)
+Henning is an Associate Professor in the [Department of Computer Science](https://www.ru.is/en/departments/dcs)
 at [Reykjavik University](https://en.ru.is) in Iceland. His CV can be accessed [here]({{site.baseurl}}/assets/cvs/CV-Henning.pdf).
 
 - [arXiv papers](https://arxiv.org/a/ulfarsson_h_1.html)

index.md

@@ -36,4 +36,28 @@ mathematics and computer science.
     </li>
     {% endif %}
   {% endfor %}
-</ul>
+</ul>
+
+### Recent Papers
+<div class="recent-papers">
+  {% assign sorted_papers = site.papers | sort: 'path' | reverse %}
+  {% for paper in sorted_papers limit: 3 %}
+  <div class="paper-preview" style="margin-bottom: 1.5em; padding: 1em; border-left: 3px solid #828282;">
+    <h4 style="margin-bottom: 0.5em;"><a href="{{ site.baseurl }}{{ paper.url }}">{{ paper.title }}</a></h4>
+    <p style="margin-bottom: 0.5em; font-style: italic; color: #666;">
+      {% if paper.journal %}{{ paper.journal }}{% endif %}
+      {% if paper.date %} • {{ paper.date | date: "%B %Y" }}{% endif %}
+    </p>
+    <p style="margin-bottom: 0.5em;">
+      {% if paper.authors %}
+        Authors:
+        {% for author_id in paper.authors %}
+          {% assign author = site.authors | where: "short_name", author_id | first %}
+          {% if author %}{{ author.name }}{% else %}{{ author_id }}{% endif %}{% unless forloop.last %}, {% endunless %}
+        {% endfor %}
+      {% endif %}
+    </p>
+    <p>{{ paper.content | strip_html | truncatewords: 30 }}</p>
+  </div>
+  {% endfor %}
+</div>