diff --git a/_data/sources.yaml b/_data/sources.yaml
index 7bd2086..c124ab4 100644
--- a/_data/sources.yaml
+++ b/_data/sources.yaml
@@ -3,67 +3,74 @@
   
 - title: "Prophet: Optimizing LSM-Based Key-Value Store on ZNS SSDs with File Lifetime Prediction and Compaction Compensation"
   authors:
-      - Gaoji Liu
-      - Chongzhuo Yang
-      - Qiaolin Yu
-      - Chang Guo
-      - Wen Xia
-      - Zhichao Cao
+    - Gaoji Liu
+    - Chongzhuo Yang
+    - Qiaolin Yu
+    - Chang Guo
+    - Wen Xia
+    - Zhichao Cao
   conference: MSST 2024
   type: To Appear
 
 - title: "SAS-Cache: A Semantic-Aware Secondary Cache for LSM-based Key-Value Stores"
   authors:
-      - Zhang Cao
-      - Chang Guo
-      - Ziyan Lv
-      - Anand Ananthabhotla
-      - Zhichao Cao
+    - Zhang Cao
+    - Chang Guo
+    - Ziyan Lv
+    - Anand Ananthabhotla
+    - Zhichao Cao
   conference: MSST 2024
   type: To Appear
 
 - title: "Can ZNS SSDs be Better Storage Devices for Persistent Cache?"
   authors:
-      - Chongzhuo Yang
-      - Zhang Cao
-      - Chang Guo
-      - Ming Zhao
-      - Zhichao Cao
+    - Chongzhuo Yang
+    - Zhang Cao
+    - Chang Guo
+    - Ming Zhao
+    - Zhichao Cao
   conference: ACM HotStorage 2024
   type: To Appear
+  buttons:
+    - type: download
+      link: ./../publications/files/HS24_ZNS_PersistentCache.pdf
+
 
 - title: "Can Modern LLMs Tune and Configure LSM-based Key-Value Stores?"
   authors:
-      - Viraj Thakkar
-      - Madhumitha Sukumar
-      - Jiaxin Dai
-      - Kaushiki Singh
-      - Zhichao Cao
+    - Viraj Thakkar
+    - Madhumitha Sukumar
+    - Jiaxin Dai
+    - Kaushiki Singh
+    - Zhichao Cao
   conference: ACM HotStorage 2024
   type: To Appear
+  buttons:
+    - type: download
+      link: ./../publications/files/HS24_GPT_Project.pdf
 
 - id: https://doi.org/10.1109/ICCD58817.2023.00050
   title: "SMRTS: A Performance and Cost-Effectiveness Optimized SSD-SMR Tiered File System with Data Deduplication"
   authors:
-      - Zhichao Cao
-      - Hao Wen
-      - Fenggang Wu
-      - David H.C. Du
+    - Zhichao Cao
+    - Hao Wen
+    - Fenggang Wu
+    - David H.C. Du
   date: '2023-11-06'
   conference: IEEE ICCD 2023
 
 - id: https://doi.org/10.1109/ICCD58817.2023.00041
   title: "K8sES: Optimizing Kubernetes with Enhanced Storage Service-Level Objectives"
   authors:
-      - Hao Wen
-      - Zhichao Cao
-      - Bingzhe Li
-      - David H.C. Du
-      - Ayman Abouelwafa
-      - Doug Voigt
-      - Shiyong Liu
-      - Jim Diehl
-      - Fenggang Wu
+    - Hao Wen
+    - Zhichao Cao
+    - Bingzhe Li
+    - David H.C. Du
+    - Ayman Abouelwafa
+    - Doug Voigt
+    - Shiyong Liu
+    - Jim Diehl
+    - Fenggang Wu
   date: '2023-11-06'
   conference: IEEE ICCD 2023
 
diff --git a/_data/types.yaml b/_data/types.yaml
index 2614f83..8229d3d 100644
--- a/_data/types.yaml
+++ b/_data/types.yaml
@@ -236,3 +236,10 @@ package:
   icon: fa-solid fa-box
   text: Package
   tooltip: Package
+
+# other
+
+download:
+  icon: fa-solid fa-file-download
+  text: Download
+  tooltip: Download
\ No newline at end of file
diff --git a/_includes/button.html b/_includes/button.html
index 8d1730d..43fcf5d 100644
--- a/_includes/button.html
+++ b/_includes/button.html
@@ -6,9 +6,7 @@
     <a
       class="button"
       href="{{ button.link | replace: "$LINK", button.link | relative_url }}"
-      {% if button.tooltip %}
-        data-tooltip="{{ button.tooltip }}"
-      {% endif %}
+      target="_blank"
       data-style="{{ include.style }}"
       {% if include.flip %}
         data-flip
diff --git a/publications/files/HS24_GPT_Project.pdf b/publications/files/HS24_GPT_Project.pdf
new file mode 100644
index 0000000..0bd4c1b
Binary files /dev/null and b/publications/files/HS24_GPT_Project.pdf differ
diff --git a/publications/files/HS24_ZNS_PersistentCache.pdf b/publications/files/HS24_ZNS_PersistentCache.pdf
new file mode 100644
index 0000000..b9a211f
Binary files /dev/null and b/publications/files/HS24_ZNS_PersistentCache.pdf differ