Topic

information retrieval

5 videos. Ordered by the type of source, then by how recent the video is.

1. 15 min

   Nov 2025 Teaching or conference talk

   A no nonsense intro to BM25

   Abhishek Thakur

   Introduces BM25, a ranking algorithm in information retrieval, including term frequency and document length.

2. 42 min

   Mar 2022 Teaching or conference talk

   5. Index construction (1/3) - Information Retrieval - ETH Zurich - Spring 2022

   Ghislain Fourny's lectures

   Covers how a search index is built, as the first of three parts of a university lecture.

   Older: check current guidance
3. 8 min

   Sept 2021 Teaching or conference talk

   2.6 Inverted index (UvA - Information Retrieval - 2021)

   Ilya Markov

   Covers the inverted index, the data structure used by search engines, in an eight-minute course segment.

   Older: check current guidance
4. 58 min

   Oct 2020 Teaching or conference talk

   IR Lecture 10: Crawlers

   Venkatesh Vinayakarao

   Covers how web crawlers work, the challenges of crawling, and a brief overview of the Nutch crawler.

   Older: check current guidance
5. 19 min

   Oct 2020 Teaching or conference talk

   IR Course Lecture 16: Popularity - Page Rank and HITS

   Venkatesh Vinayakarao

   Covers two models of page popularity, PageRank with its random surfer model and HITS, in a course lecture.

   Older: check current guidance