Gregorio Convertino | XRCE - Academia.edu (original) (raw)

Papers by Gregorio Convertino

Web 2.0 tools are penetrating into organizations after their successful adoption in the consumer ... more Web 2.0 tools are penetrating into organizations after their successful adoption in the consumer domain (eg, social networking; sharing of photos, videos, tags, or bookmarks; wiki-based editing). Some of these new tools and the collaborative processes that they support on the large scale are often referred to as Collective Intelligence (CI). The workshop brings together leading researchers and designers who are studying or developing CI tools aimed at workers in organizations. The goal is to further articulate the ...

Proceedings of the Fifth International AAAI …, 2011

... Herring, S., Paolillo, J., Ramos-Vielba, I., Kouper, I., Wright, E., Stoerger, S., Scheidt, L... more ... Herring, S., Paolillo, J., Ramos-Vielba, I., Kouper, I., Wright, E., Stoerger, S., Scheidt, L., and Clark, B. 2007. Language Networks on LiveJournal. Proc. HICSS'07. ... 2010. Half of Messages on Twitter are not in English, Japanese is the Second Most Used Language. ...

Proceedings of the 5th …, 2009

Prior research on Wikipedia has characterized the growth in content and editors as being fundamen... more Prior research on Wikipedia has characterized the growth in content and editors as being fundamentally exponential in nature, extrapolating current trends into the future. We show that recent editing activity suggests that Wikipedia growth has slowed, and perhaps plateaued, indicating that it may have come against its limits to growth. We measure growth, population shifts, and patterns of editor and administrator activities, contrasting these against past results where possible. Both the rate of page growth and editor growth has declined. As growth has declined, there are indicators of increased coordination and overhead costs, exclusion of newcomers, and resistance to new edits. We discuss some possible explanations for these new developments in Wikipedia including decreased opportunities for sharing existing knowledge and increased bureaucratic stress on the socio-technical system itself.

A system composed of an MPEG-2 video transcoder to change bitrate, frame rate and frame size and ... more A system composed of an MPEG-2 video transcoder to change bitrate, frame rate and frame size and a cross layer controller gathering information from physical, MAC, driver, and RTCP layers, calculating instantaneous network throughput, to optimize real-time adaptive A/V streaming over IEEE 802.11 is presented.

Proceedings of …, 2007

Regional emergency planners use "tabletop" exercises to develop plans, to articulate strategies a... more Regional emergency planners use "tabletop" exercises to develop plans, to articulate strategies and constraints, and to practice working together. We conducted an experimental paper prototyping study to identify design requirements for a collaborative system to support distributed tabletop emergency planning exercises. We designed a reference task for geo-collaborative planning by adapting the hidden profile paradigm from social psychology as a model of obstacles to effective coordination in decision making. Our objective was to assess the usefulness and tractability of experimental paper prototyping methods for complex collaborative problem-solving contexts.

… and Multiple Views in …, 2003

Multiple-view visualizations are useful for finding patterns in complex data sets, but little res... more Multiple-view visualizations are useful for finding patterns in complex data sets, but little research has been done on how they are used. We performed a controlled experiment to study cognitive strategies and context switching by using combination of visualizations and different task types as independent variables, and collecting qualitative and quantitative data. To collect the data paper-based tests, logging of participants' interactions, eyetracking, think-aloud techniques, and video recordings were used. Unlike suggestions in literature, our results show that when considering dual-view visualizations the time cost for context switching may not be significant, and similar visualizations may actually cause more interference.

Proceedings of the …, 2008

We study the development of common ground in an emergency management planning task. Twelve three-... more We study the development of common ground in an emergency management planning task. Twelve three-person multi-role teams performed the task with a paper prototype in a controlled setting; each team completed three versions of the task. We use converging measures to document the development of common ground in the teams and present an in-depth analysis of the characteristics of the common ground development process. Our findings indicate that in complex collaborative work, process common ground increases, thus diminishing the need for acts like information querying or strategy discussions about how to organize the collaborative activities. However, content common ground is created and tested throughout the three runs; in fact dialogue acts used to clarify this content increase over time. Discussion of the implications of these findings for the theory of common ground and the design of collaborative systems follows.

Proceedings of the third …, 2004

Many failures in long-term collaboration occur because of a lack of activity awareness. Activity ... more Many failures in long-term collaboration occur because of a lack of activity awareness. Activity awareness is a broad concept that involves awareness of synchronous and asynchronous interactions over extended time periods. We describe a procedure to evaluate activity awareness and collaborative activities in a controlled setting. The activities used are modeled on real-world collaborations documented earlier in a field study. We developed an experimental method to study these activity awareness problems in the laboratory. Participants worked on a simulated long-term project in the laboratory over multiple experimental sessions with a confederate, who partially scripted activities and probes. We present evidence showing that this method represents a valid model of real collaboration, based on participants' active engagement, lively negotiation, and awareness difficulties. We found that having the ability to define, reproduce, and systematically manipulate collaborative situations allowed us to assess the effect of realistic conditions on activity awareness in remote collaboration.

… and Multiple Views …, 2005

In this paper we investigate strategies to support knowledge sharing in distributed, synchronous ... more In this paper we investigate strategies to support knowledge sharing in distributed, synchronous collaboration. Our goal is to propose, justify, and assess a multiple view approach to support common ground in geo-collaboration within multi-role teams. We argue that a collaborative workspace, which includes multiple role-specific views coordinated with a team view, affords a clear separation between role-specific and shared data, enables the team to filter out role-specific details and share strategic knowledge, and allows serendipitous learning about knowledge and expertise within the team. We discuss some key issues that need to be addressed when designing multiple views as a collaborative visualization. We illustrate the design features of a geo-collaborative prototype that address these issues in the context of two collaborative scenarios. We finally describe a laboratory method for investigating how multi-role teams establish common ground while the amount of prior shared knowledge and the type of visualization are experimentally manipulated.

COURSES AND …, 1999

EVWUDFW Generally, user modeling concerns a person interacting with a standing console. This scen... more EVWUDFW Generally, user modeling concerns a person interacting with a standing console. This scenario does not represent the +\SHU$XGLR system in use: a visitor freely moves in a museum, gathering information from an adaptive and portable electronic guide. To provide designers with presumptive user behavior, data about visitor profiles and visit styles were collected through a questionnaire. The study pointed out unpredicted situations (e.g., the importance of social context) and confirmed some working hypotheses (e.g., the relevance of visit span). This paper reports on this experience, describing how to go from designer questions to guidelines for user modeling, making the best use of empirical data.

Interacting with …, 2006

A contemporary approach to describing and theorizing about joint human endeavor is to posit 'know... more A contemporary approach to describing and theorizing about joint human endeavor is to posit 'knowledge in common' as a basis for awareness and coordination. Recent analysis has identified weaknesses in this approach even as it is typically employed in relatively simple task contexts. We suggest that in realistically complex circumstances, people share activities and not merely concepts. We describe a framework for understanding joint endeavor in terms of four facets of activity awareness: common ground, communities of practice, social capital, and human development. We illustrate the sort of analysis we favor with a scenario from emergency management, and consider implications and future directions for system design and empirical methods. q