This book constitutes the refereed proceedings of the 11th International Conference onHealth Information Science, HIS 2022, held in Virtual Event during October 28–30, 2022.The 20 full papers and 9 short papers included in this book were carefully reviewed andselected from 54 submissions. They were organized in topical sections as follows: ​applications of health and medical data; health and medical data processing; health and medical data mining via graph-based approaches; and health and medical data classification.

This book constitutes the refereed proceedings of the 11th International Conference onHealth Information Science, HIS 2022, held in Virtual Event during October 28–30, 2022.The 20 full papers and 9 short papers included in this book were carefully reviewed andselected from 54 submissions. They were organized in topical sections as follows: ​applications of health and medical data; health and medical data processing; health and medical data mining via graph-based approaches; and health and medical data classification.

This book constitutes the refereed proceedings of the 18th International Conference on Similarity Search and Applications, SISAP 2025, held in Reykjavik, Iceland, during October 2025.The 18 full papers and 9 short papers included in the proceedings were carefully reviewed and selected from 58 submissions. The book also contains 2 Doctoral Symposium papers, 3 demonstration papers, and 5 indexing challenge papers. The contributions were organized in the following topical sections: Applications; Foundations; Search and Retrieval; Similarity Measures; Clustering; Indexing; Learning-Based Methods; Doctoral Symposium; Demonstration Papers; and Indexing Challenge.

This book constitutes the refereed proceedings of the 11th International Conference onHealth Information Science, HIS 2022, held in Virtual Event during October 28–30, 2022.The 20 full papers and 9 short papers included in this book were carefully reviewed andselected from 54 submissions. They were organized in topical sections as follows: ​applications of health and medical data; health and medical data processing; health and medical data mining via graph-based approaches; and health and medical data classification.

This book constitutes the refereed proceedings of the 11th International Conference onHealth Information Science, HIS 2022, held in Virtual Event during October 28–30, 2022.The 20 full papers and 9 short papers included in this book were carefully reviewed andselected from 54 submissions. They were organized in topical sections as follows: ​applications of health and medical data; health and medical data processing; health and medical data mining via graph-based approaches; and health and medical data classification.

This book constitutes the refereed proceedings of the 18th International Conference on Similarity Search and Applications, SISAP 2025, held in Reykjavik, Iceland, during October 2025.The 18 full papers and 9 short papers included in the proceedings were carefully reviewed and selected from 58 submissions. The book also contains 2 Doctoral Symposium papers, 3 demonstration papers, and 5 indexing challenge papers. The contributions were organized in the following topical sections: Applications; Foundations; Search and Retrieval; Similarity Measures; Clustering; Indexing; Learning-Based Methods; Doctoral Symposium; Demonstration Papers; and Indexing Challenge.