Conversations in context

Moor, A. de

doi:10.1145/1839707.1839744

Cited by 15 publications

(3 citation statements)

References 16 publications

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“…A tweet is self-contained if it does not contain any reference to other tweets except through the same hashtag [15]. For example, in Table I, t 4 is self-contained.…”

Section: A Measuring Relationships Between Tweetsmentioning

confidence: 99%

What and With Whom? Identifying Topics in Twitter Through Both Interactions and Text

Nugroho

Yang

Zhao

et al. 2020

IEEE Trans. Serv. Comput.

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Twitter has become one of the most popular sources of real-time information about events happening in the world. Because of the overwhelming amount of information continuously flowing through the Twitter environment, topic derivation is essential. It indeed plays a valuable role in a variety of Twitterbased applications, including content recommendations, news summarization, market analysis, etc. Topic derivation methods are typically based on semantic features of tweet contents. Because tweets are short by nature, such methods suffer from data sparsity. To alleviate this problem, this paper proposes a topic derivation method that incorporates tweet text similarity and interactions measures. Besides the tweet contents, the approach takes into account several types of interactions amongst tweets: tweets which mention the same people, replies and retweets. Topic derivation is done through a two-step matrix factorization process. We conducted a number of experiments on several Twitter datasets to reveal both the individual and integrated effects of the various features being considered. Our experimental results demonstrate that the proposed method outperforms other advanced topic derivation methods.

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“…A tweet is self-contained if it does not contain any reference to other tweets except through the same hashtag [15]. For example, in Table I, t 4 is self-contained.…”

Section: A Measuring Relationships Between Tweetsmentioning

confidence: 99%

What and With Whom? Identifying Topics in Twitter Through Both Interactions and Text

Nugroho

Yang

Zhao

et al. 2020

IEEE Trans. Serv. Comput.

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“…Kunz and Rittel (1970) have devised the issue-based information system (IBIS) model to structure discussion activities of collaborative design. The IBIS model is effective and widely used in collaborative design and analysis for student on-line group work (e.g., De Moor& Efimova, 2004;Liu & Tsai, 2008). As depicted in Figure 2, in the IBIS model, students' discourse is initiated with an issue, which receives several positions in order to reach a solution.…”

Section: Ibismentioning

confidence: 99%

Scripted Collaboration to Leverage the Impact of Algorithm Visualization Tools in Online Learning

Demetriadis

Foutsitzis

2013

International Journal of E-Collaboration

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This work presents research evidence on the impact of a collaboration script to leverage the use of an Algorithm Visualization (AV) system as a tool for experimentation and reflection in the context of online collaboration. The objective of the authors’ effort is to improve the learning conditions when AV systems are used as online learning tools, avoiding situations where unguided collaboration may result in suboptimal peer interaction. Results from two studies are reported, where university students collaborated online following the steps of a reciprocal peer tutoring script and using two different AV systems to visualize their solutions on specific algorithm-related learning tasks. Discourse analysis based on an appropriately extended IBIS model and further statistical analysis indicate that the use of the collaboration script enhances the task-related peer interaction and consequently the intrinsic feedback that peers receive from interacting with the AV system, something expected to lead to improved learning outcomes. The implication for AV system designers is that the inclusion of a collaboration script component in the system design is strongly encouraged as a means to augment the expected benefits from online collaborative learning tasks.

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“…an emerging community might require tools for getting to know each other or for brainstorming, while an already established community might require tools that support very specific and well defined activities. It cannot be assumed that all requirements can be met by a single closed system: community members often use a variety of different tools to support their activities [38]. However, even in online communities that use a less integrated set of spaces and tools, often not all requirements of all members are considered.…”

Section: Pragmatic Webmentioning

confidence: 99%

Interaction design in the pragmatic Web

Hornung¹

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The Web and its underlying technologies enable interactions among people that were unimaginable a few years ago. An important type of purposeful interaction is collaboration. Mediated by the Web, people from different social and cultural backgrounds, with different needs, preferences and capabilities can collaborate with each other. Collaboration often takes place in heterogeneous contexts that are not only defined by the actual situations of the collaboration partners, but also by individual and collective past experiences. The Web as a medium has an impact on collaboration and facilitates or enables certain aspects of collaboration while making others more difficult.In this PhD thesis we investigate Interaction Design related questions about webmediated collaboration under a Pragmatic Web perspective. Our prime objective is to understand semiotic barriers to web-mediated collaboration and propose an approach to Interaction Design that reduces these barriers. Semiotic barriers are barriers related to communication, mediation and representation. These barriers emerge during web-based collaboration since many mechanisms of interpersonal face-to-face communication are not available. Depending on the context, semiotic barriers often have a negative impact on collaboration, but in some cases they might also have positive effects.The approach to Interaction Design proposed in this PhD thesis is rooted in the Pragmatic Web and uses Organizational Semiotics and Activity Theory as its theoretical and methodological frames of reference. The theoretic investigations were practically grounded in real world practices by participating in a research project in the domain of inclusive education. We materialized the proposed approach in the design of a prototype and the implementation of the corresponding tool that supports a practice of inclusive education professionals. Furthermore we proposed and applied a pragmatics-driven evaluation method in a longitudinal case study. Prototype design, tool implementation, and the conducted evaluation provided evidence that the proposed approach to pragmaticsdriven Interaction Design can reduce semiotic barriers and thus promote web-mediated collaboration.ix Luckily, writing a PhD thesis is not a solitary enterprise. During the last years, I had the privilege to collaborate or exchange ideas with many people who knowingly or unkowingly left their marks on this work. First and foremost, I would like to thank my orientadora Cecilia Baranauskas who inspired, challenged, and guided me, finding always the right dose and setting an example on a professional and personal level.My thanks go to the dwellers of sala 71 and sala 90, "old" and "new", who shared many a nice conversation and not less lunch, cups of tea or coffee: Alessandro, Elaine, Leonardo, Roberto, and Vanessa. I would like to thank the people who gave me the opportunity to participate as co-author of their work:

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Conversations in context

Cited by 15 publications

References 16 publications

What and With Whom? Identifying Topics in Twitter Through Both Interactions and Text

What and With Whom? Identifying Topics in Twitter Through Both Interactions and Text

Scripted Collaboration to Leverage the Impact of Algorithm Visualization Tools in Online Learning

Interaction design in the pragmatic Web

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