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Objects with multiple numeric attributes can be compared within any "subspace" (subset of attributes). In applications such as computational journalism, users are interested in claims of the form: <i>Karl Malone is one of the only two players in NBA history with at least 25,000 points, 12,000 rebounds, and 5,000 assists in one's career</i>. One challenge in(More)
We present a novel, low-power and untethered pneumatic haptic device, namely the ACTIVE-Hand, for realistic and real-time 3D gaming experience. Currently, body-motion based 3D gaming systems primarily use visual feedback to provide partly immersive gaming experiences. Tactile feedback systems in Virtual Reality provide immersion with high tactile(More)
Our news are saturated with claims of " facts " made from data. Database research has in the past focused on how to answer queries, but has not devoted much attention to discerning more subtle qualities of the resulting claims, e.g., is a claim " cherry-picking " ? This paper proposes a framework that models claims based on struc-tured data as parameterized(More)
Towards computational journalism, we present FactWatcher, a system that helps journalists identify data-backed, attention-seizing facts which serve as leads to news stories. FactWatcher discovers three types of facts, including situational facts, one-of-the-few facts, and prominent streaks, through a unified suite of data model, algorithm framework, and(More)
Are you fed up with "lies, d---ned lies, and statistics" made up from data in our media? For claims based on structured data, we present a system to automatically assess the quality of claims (beyond their correctness) and counter misleading claims that cherry-pick data to advance their conclusions. The key insight is to model such claims as parameterized(More)
The most effective way to explore data is through visualizing the results of exploration queries. For example, an exploration query could be an aggregate of some measures over time intervals, and a pattern or abnormality can be discovered through a time series plot of the query results. In this paper, we examine a special kind of exploration query, namely(More)
The increasing popularity of mobile device usage has ush-ered in many features in modern search engines that help users with various information needs. One of those needs is Knowledge Exploration, where related documents are returned in response to a user query, either directly through right-hand side knowledge panels or indirectly through navigable(More)
In many applications, the system needs to selectively present a small subset of answers to users. The set of all possible answers can be seen as an elevation surface over a domain, where the elevation measures the quality of each answer, and the dimensions of the domain correspond to attributes of the answers with which similarity between answers can be(More)
Our media is saturated with claims of &#8220;facts&#8221; made from data. Database research has in the past focused on how to answer queries, but has not devoted much attention to discerning more subtle qualities of the resulting claims, for example, is a claim &#8220;cherry-picking&#8221;? This article proposes a framework that models claims based on(More)
In order to study the dynamic characteristics of multi-machine coordinated virtual inertial control, it is necessary to develop a simplified model of wind turbine generator system(WTGS). This paper presents a general average model (GA model) of directly-driven wind turbine with permanent magnet synchronous generator (D-PMSG) which ignores the dynamic(More)