Elad Kravi

  • Citations Per Year
Learn More
Online communities within the enterprise offer their leaders an easy and accessible way to attract, engage, and influence others. Our research studies the recommendation of social media content to leaders (owners) of online communities within the enterprise. We developed a system that suggests to owners new content from outside the community, which might(More)
Microblogs allow users to publish geo-tagged posts---short textual messages assigned to a geographic location. Users send posts from places they visit and discuss an idiosyncratic mixture of personal and general topics. Thus, it is reasonable to assume that the locations and the textual content of posts will be unique and will identify the posting user, to(More)
With mobile devices, web search is no longer limited to specific locations. People conduct search from practically anywhere, including at home, at work, when traveling and when on vacation. How should this influence search tools and web services? In this paper, we argue that information needs are affected by the familiarity of the environment. To formalize(More)
Recently, there is a rapid growth in the use of microblogs, such as Twitter, and of social networks, such as Instagram, to publish geo-tagged posts that indicate the location of the user at the time when the message is sent. This provides abundant geospatial data that can be analyzed to understand the behavior of masses of people, in particular in urban.(More)
Offline map matching is a process of associating a sequence of GPS location readings measured with a device held by a traveling user, to the real-world roads that were presumably traveled by the user. The main goals in map matching are (1) to provide an association which is as accurate as possible with respect to actual traveled roads, and (2) to compute(More)
Although online communities have become popular both on the web and within enterprises, many of them often experience low levels of activity and engagement from their members. Previous studies identified the important role of community leaders in maintaining the health and vitality of their communities. One of their key means for doing so is by contributing(More)
In this paper, we study multi-click queries - queries for which more than one click is performed by the same user within the same query session. Such queries may reflect a more complex information need, which leads the user to examine a variety of results. We present a comprehensive analysis that reveals unique characteristics of multi-click queries, in(More)
In the web, page creators often compete for their ranking on relevant search queries, as high ranking attracts users and may lead to increased revenues. The positive effect of this competition is that it encourages page owners to improve their content. However, some techniques used for this improvement, such as <i>keyword stuffing</i>, are considered(More)
People nowadays share large amounts of data online, explicitly or implicitly. Analysis of such data can detect useful behavior patterns of varying natures and scales, from mass immigration between continents to trendy venues in a city in turn. Detecting these patterns can be used for improving online services. However, capturing behavior patterns may be(More)
This paper investigates the problem of geo-social similarity among users of online social networks, based on the locations of their activities (e.g., posting messages or photographs). Finding pairs of geo-socially similar users or detecting that two sets of locations (of activities) belong to the same user has important applications in privacy protection,(More)