Revert research changes from academic update

Author: hyeondo-jang

research.html

@@ -484,7 +484,6 @@ <h2>Research Focus</h2>
             </div>
         </div>
 
-
         <div class="section">
             <img src="research_focus/opt-applied.png" alt="Deep Learning Applications">
             <div class="section-text">
@@ -507,6 +506,7 @@ <h2>Research Focus</h2>
                     </div>
                 </div>
             </div>
+        </div>
 
         <div class="section">
             <img src="research_focus/opt-deep.jpeg" alt="Advanced Optimization">