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In this paper we describe the Time Explorer, an application designed for analyzing how news changes over time. We extend on current time-based systems in several important ways. First, Time Explorer is designed to help users discover how entities such as people and locations associated with a query change over time. Second, by searching on time expressions(More)
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In this paper we present a novel approach for combining Case-Based Reasoning (CBR) and Argumentation. This approach involves 1) the use of CBR for evaluating the arguments submitted by agents in collaborative decision making dialogs, and 2) the use of Argument Schemes and Critical Questions to organize the CBR memory space. The former involves use of past(More)
In this paper we describe a human organ selection process in which agents argue over whether a given donor's organ is viable for transplantation. This process is framed in the CARREL System; an agent-based organization designed to improve the overall transplant process. We formalize an argumentation based framework that enables CARREL agents to construct(More)
In this paper we present a framework in which heterogeneous agents can argue over the viability of a human organ for transplantation. This collaborative decision making process among human and/or software agents is mediated by a software agent that uses argument schemes and critical questions to direct the deliberation, and determines a final evaluation of(More)
In this paper we propose a dialogue game for agents to deliberate over a proposed action. The agents' dialogue moves are defined by a structured set of argument schemes and critical questions (CQs). Thus, a dialogue move is an instantiated scheme (i.e. an argument) or a CQ (i.e. a challenge on the argument instantiated in the scheme). The proposed dialogue(More)
In this paper we present the argument-based model proCLAIM, intended to provide a setting for heterogeneous agents to deliberate over safety critical actions. To achieve this purpose proCLAIM features a Mediator Agent with three main tasks: (1) guiding the participating agents in what their valid dialectical moves are at each stage of the dialogue; (2)(More)
PRiSMA is an image search application for tablet and desktop devices intended to facilitate and promote the searching of images in parallel. With an intuitive user interface, users can branch their queries into multiple horizontal sliding strips to simultaneously explore different perspectives of large image collections (<i>e.g.</i>, colors, geographical(More)