update profiles and book.

Author: caltechdigitaltwin

_pages/book.md

@@ -52,7 +52,7 @@ nav_order: 7
 
 This rough draft is based on lecture notes for the Power System Analysis courses that I have been teaching at Caltech for the last decade or so. Any corrections, questions, comments, or pointers will be greatly appreciated!
 
-<div id="jump1" s_sitetyle="margin-bottom: 12px;"><font size='5.5' id = "OPF"><a target = "_blank" href='../assets/book/PSA/Low-PSA-v20250821.pdf'><b>Current draft</b></a> (May 21, 2025)</font></div>
+<div id="jump1" s_sitetyle="margin-bottom: 12px;"><font size='5.5' id = "OPF"><a target = "_blank" href='../assets/book/PSA/Low-PSA-v20250821.pdf'><b>Current draft</b></a> (Aug 21, 2025)</font></div>
 
 - Part I: Power network: models, operations, analysis (Ch 1 - 7)
 - Part II: Power flow optimization (Ch 8 - 13)

_pages/descriptions/about_yiheng_xie.md

@@ -1,3 +1,3 @@
 <b>PhD Student in Computing and Mathematical Sciences</b>
 <br>
-I am a PhD student at Caltech CMS, focusing on the modeling, analysis and optimization of energy systems. I am intersted in research questions with rigor and relevance. I spent the last two years building a high-resolution sensor network in California, dubbed "Digital Twin."
+I am a PhD student at Caltech CMS, focusing on the modeling, control, and optimization of energy systems. I am intersted in research questions with rigor and relevance.

_pages/profiles.md

@@ -18,22 +18,13 @@ profiles:
       <a href = "../assets/pdf/LowCV.pdf" target="_blank"><b>CV</font></b></a>
 
   # Current graduate students
-  - align: left
-    image: graduates/nico-christianson.png
-    content: descriptions/about_nico_christianson.md
-    role: CurrentGradStudent
-    image_circular: false # crops the image to make it circular
-    more_info: >
-      <p>Nico Christianson</p>
-      <a href = "https://nicochristianson.com/"><b>Website</font></b></a>
   - align: left
     image: graduates/yiheng-xie.png
     content: descriptions/about_yiheng_xie.md
     role: CurrentGradStudent
     image_circular: false # crops the image to make it circular
     more_info: >
       <p>Yiheng Xie</p>
-      <a href = "https://yxie20.github.io/"><b>Website</font></b></a>
   - align: left
     image: graduates/han-xu.jpg
     content: descriptions/about_han_xu.md
@@ -44,14 +35,7 @@ profiles:
       <a href = "https://thu-xuhan.github.io/"><b>Website</font></b></a>
   
   # Current visiting students
-#   - align: left
-#     image: visiting-graduates/verena_haberle.jpg
-#     content: descriptions/about_verena_haberle.md
-#     role: CurrentVisitingStudent
-#     image_circular: false # crops the image to make it circular
-#     more_info: >
-#       <p>Verena Häberle</p>
-#       <a href = "https://control.ee.ethz.ch/people/profile.verena-haeberle.html"><b>Website</font></b></a>
+
 
   # Caltech faculty collaborators
   - align: left
@@ -178,15 +162,20 @@ profiles:
     lineBreak: "<br><br>"
 
   # Previous graduate students
+  - role: PreviousGrad
+    date: PhD 2025
+    current: Stanford --> JHU
+    portfolio_link: https://nicochristianson.com/
+    name: Nico Christianson
   - role: PreviousGrad
     date: Schmidt Scholar 2024
     name: Thuy-Linh Le
     lineBreak: "<br>"
   - role: PreviousGrad
     date: PhD 2023
     name: Lucien Werner
-    lineBreak: <br>
-    description: Citadel
+    # lineBreak: <br>
+    current: Citadel
     portfolio_link: https://www.linkedin.com/in/lucienwerner
   - role: PreviousGrad
     date: PhD 2022
@@ -409,15 +398,14 @@ profiles:
     university: Postech, Korea
 
   # Previous Visiting Students (mostly PhD)
-    # lineBreak: <br><br>
-  - role: PreviousVisitingStudent
-    date: 2024-2025
-    name: Kaibo Chen
   - role: PreviousVisitingStudent
     date: 2024
     name: Verena Häberle
     university: ETH Zurich
     portfolio_link: https://control.ee.ethz.ch/people/profile.verena-haeberle.html
+  - role: PreviousVisitingStudent
+    date: 2024-2025
+    name: Kaibo Chen
   - role: PreviousVisitingStudent
     date: 2024
     name: Ethan Varghese