Dhruv Gupta

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We investigate how time intervals of interest to a query can be identified automatically based on pseudo-relevant documents, taking into account both their publication dates and temporal expressions from their contents. Our approach is based on a generative model and is able to determine time intervals at different temporal granularities (e.g., day, month,(More)
For our evaluation setup we considered three categories of history-oriented queries: categories of history-oriented queries : long-lasting wars, recurring events, and famous personalities. For constructing the queries we utilized reliable sources on the Web and data presented in prior research articles [2, 3]. We describe the details next. Queries for(More)
This research article presents TimeSearch, a probabilistic framework, that competed in the Temporalia-2 task. The subtasks in Temporalia-2 require an information retrieval system to be informed of the temporal expressions (e.g. 1990s) in documents and queries to identify relevant documents. Analysis of these temporal expressions like natural language(More)
In this article, I present the questions that I seek to answer in my PhD research. I posit to analyze natural language text with the help of semantic annotations and mine important events for navigating large text corpora. Semantic annotations such as named entities, geographic locations, and temporal expressions can help us mine events from the given(More)
Born-digital document collections contain vast amounts of historical facts and knowledge. However, manual assessment of these large text collections is infeasible. In this paper, we demonstrate a retrieval system, DIGITALHISTORIAN, that analyzes these document collections using semantic annotations in the form of temporal expressions and named entities(More)
Getting an overview of a historic entity or event can be difficult in search results, especially if important dates concerning the entity or event are not known beforehand. For such information needs, users benefit if returned results covered diverse dates, thus giving an overview of what has happened throughout history. Such a method can be a building(More)
Subjective well being has been widely researched in the past few decades and in practical terms it is a term that encompasses the various ways people evaluate their lives including concepts such as life satisfaction, work and health etc. Since, it is well known, that psychological factors including stress, anxiety, poor sleeping habits etc are known to be(More)