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Logo: Institut für Verteilte Systeme - Fachgebiet Wissensbasierte Systeme (KBS)
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Logo: Institut für Verteilte Systeme - Fachgebiet Wissensbasierte Systeme (KBS)
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Temporal Information Retrieval

Dr. Avishek Anand



In the past decade, the Web has evolved in many aspects, such as, its size, content, and usage. With the growing volumes of and reliance on digital documents on the Web, there is a clear need for better information retrieval (IR) approaches that keep relevant information accessible, available, and meaningful over time. In the past decade, time-aware approaches to information retrieval have become interesting, emerging topics and shown that the time dimension affects search performance. In other words, it has been shown that taking the time dimension into account can improve search performance over traditional (non time-aware) IR approaches.

In this course, in the first place, aims to introduce students to the general and wide topic of Web evolution, and then pinpoint a number of issues that is related to temporal aspects of search and IR. We plan to start with an overview of seminal works that shed light on the evolution of Web within time. Next, we will focus on the impacts of this evolution on search and we will essentially focus on indexing of versioned document collections and time-aware retrieval and ranking. We will discuss evolution of search results, and wrap up the course with a review of some recent applications on mining and analytics on temporal web collections.


Recommended Literature:

Christopher D. Manning, Prabhakar Raghavan and Hinrich Schütze, Introduction to Information Retrieval, Cambridge University Press. 2008.

Stefan Buettcher, Charles Clarke and Gordon Cormack, Information Retrieval: Implementing and Evaluating Search Engines, 2010.


Computer science students (recommended from the 3. semester) and ITIS students.


Dr. Avishek Anand (anandl3s.de)

Teaching Assistant: Jaspreet Singh (singhl3s.de)



Course Webpage :


 Lecture Dates

The lecture and exercise sessions in WS 2014/2015 take place in Multimedia-Room, Appelstr. 9a, Monday 14:00 - ca. 15:30 from 13.10.2014 to 26.01.2015.

The lectures will be recorded only on demand.

Exam in WS 2014-15

The exam in WS 2014/2015 will take place last day of the course or second week of February. 

Exam duration: 25 minutes

Lecture notes:

Please find the lecture notes for WS 2014/2015 in the official website.