We introduce a system for sensing complex social systems with data collected from 100 mobile phones over the course of 9 months. We demonstrate the ability to use standard Bluetooth-enabled mobile telephones to measure information access and use in different contexts, recognize social patterns in daily user activity, infer relationships, identify socially significant locations, and model organizational rhythms.

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Reality mining: sensing complex social systems

Ubiquitous computing is the method of enhancing computer use by making many computers available throughout the physical environment, but making them effectively invisible to the user. Since we started this work at Xerox PARC in 1988, a number of researchers around the world have begun to work in the ubiquitous computing framework. This paper explains what is new and different about the computer science in ubiquitous computing. It starts with a brief overview of ubiquitous computing, and then elaborates through a series of examples drawn from various subdisciplines of computer science: hardware components (e.g. chips), network protocols, interaction substrates (e.g. software for screens and pens), applications, privacy, and computational methods. Ubiquitous computing offers a framework for new and exciting research across the spectrum of computer science.

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Some computer science issues in ubiquitous computing

(1995). Interaction Analysis: Foundations and Practice. Journal of the Learning Sciences: Vol. 4, No. 1, pp. 39-103.

https://www.jstor.org/stable/pdfplus/1466849.pdf

Interaction Analysis: Foundations and Practice

E-learning is emerging as the new paradigm of modern education. Worldwide, the e-learning market has a growth rate of 35.6%, but failures exist. Little is known about why many users stop their online learning after their initial experience. Previous research done under different task environments has suggested a variety of factors affecting user satisfaction with e-Learning. This study developed an integrated model with six dimensions: learners, instructors, courses, technology, design, and environment. A survey was conducted to investigate the critical factors affecting learners' satisfaction in e-Learning. The results revealed that learner computer anxiety, instructor attitude toward e-Learning, e-Learning course flexibility, e-Learning course quality, perceived usefulness, perceived ease of use, and diversity in assessments are the critical factors affecting learners' perceived satisfaction. The results show institutions how to improve learner satisfaction and further strengthen their e-Learning implementation.

http://water-msc.org/en/knowledge_base/successful_e_learning.pdf

What drives a successful e-Learning? An empirical investigation of the critical factors influencing learner satisfaction

Giant strides in information technology at the turn of the century may have unleashed unreachable goals. With the invention of groupware, people expect to communicate easily with each other and accomplish difficult work even though they are remotely located or rarely overlap in time. Major corporations launch global teams, expecting that technology will make "virtual collocation" possible. Federal research money encourages global science through the establishment of "collaboratories." We review over 10 years of field and laboratory investigations of collocated and noncollocated synchronous group collaborations. In particular, we compare collocated work with remote work as it is possible today and comment on the promise of remote work tomorrow. We focus on the sociotechnical conditions required for effective distance work and bring together the results with four key concepts: common ground, coupling of work, collaboration readiness, and collaboration technology readiness. Groups with high common ground and loosely coupled work, with readiness both for collaboration and collaboration technology, have a chance at succeeding with remote work. Deviations from each of these create strain on the relationships among teammates and require changes in the work or processes of collaboration to succeed. Often they do not succeed because distance still matters.

Distance matters

A system and method provides each networked computer user with a user interface displaying visual representations of selected other computer users, generally of those workers in the user's workgroup, and further provides communication mechanisms for efficiently and easily contacting any of the displayed workers. The visual representations of the other users are frequently updated to indicate the activity level of these users. These activity level cues help users predict if the other users are likely to be available for an interaction. The user interface also includes a display portion and mechanism for storing data files and the like so that all workgroup members may accumulate a set data files commonly used by the workgroup, and may transfer files in this manner to other workgroup members. The data files may be stored in association with specific interactive discussion windows, known as chat rooms, or directly in the user interface.

System and method providing a computer user interface enabling access to distributed workgroup members

The work activity of small groups of three to four people was videotaped and analysed in order to understand collaborative work and to guide the development of tools to support it. The analysis focused on the group's shared drawing activity—their listing, drawing, gesturing and talking around a shared drawing surface. This analysis identified specific features of collaborative work activity that raise design implications for collaborative technology: (1) collaborators use hand gestures to uniquely communicate significant information; (2) the process of creating and using drawings conveys much information not contained in the resulting drawings; (3) the drawing space is an important resource for the group in mediating their collaboration; (4) there is a fluent mix of activity in the drawing space; and (5) the spatial orientation among the collaborators and the drawing space has a role in structuring their activity. These observations are illustrated with examples from the video data, and the design implications they raise are discussed.

Findings from observational studies of collaborative work

This paper describes the Liveboard, a large interactive display system. With nearly one million pixels and an accurate, multi-state, cordless pen, the Liveboard provides a basis for research on user interfaces for group meetings, presentations and remote collaboration. We describe the underlying hardware and software of the Liveboard, along with several software applications that have been developed. In describing the system, we point out the design rationale that was used to make various choices. We present the results of an informal survey of Liveboard users, and describe some of the improvements that have been made in response to user feedback. We conclude with several general observations about the use of large public interactive displays.

Liveboard: a large interactive display supporting group meetings, presentations, and remote collaboration

We explored the use of awareness information to facilitate communication by developing a series of prototypes. The ConNexus prototype integrates awareness information, instant messaging, and other communication channels in an interface that runs on a desktop computer. The Awarenex prototype extends that functionality to wireless handheld devices, such as a Palm. A speech interface also enables callers to make use of the awareness information over the telephone. While the prototypes offer similar functionality, the interfaces reflect the different design affordances and use context of each platform. We discuss the design implications of providing awareness information on devices with varying interface and network characteristics.

/pdf/connexus-to-awarenex-extending-awareness-to-mobile-users-2daejuotox.pdf

ConNexus to awarenex: extending awareness to mobile users

A computer system and method provide networked computer users with information about which other users are task proximate to the user, thereby facilitating spontaneous communications regarding task-related, or other, issues. The information about other users is displayed in a user interface window on each computer that presents a visual representation of each user who is task proximate to the user operating the computer. Task proximity to other users may change as the user context switches between applications, and the user interface window is updated accordingly. Task proximity is determined individually by different applications. One exemplary system architecture for providing the information includes a person object representing each user, and storing the visual representation of the user. An encounter window on each computer displays the visual representations. A number of encounter-aware applications may execute on each computer. An encounter server on each computer provides communication between the encounter-aware applications of the positions of each user, position being determined, for example, by the function the user is using, the data, and the time. At least one encounter-aware application includes a match object that accepts information from the encounter servers about user positions and determines the task proximity of the users. The match object informs the encounter server of the task proximity of the user. The encounter server then updates the appropriate encounter window. The encounter windows further provide a number of communication mechanisms so that users can efficiently contact those other users who are task proximate.

John C. Tang

Papers

System and method providing a computer user interface enabling access to distributed workgroup members

Findings from observational studies of collaborative work

Liveboard: a large interactive display supporting group meetings, presentations, and remote collaboration

ConNexus to awarenex: extending awareness to mobile users

System and method enabling awareness of others working on similar tasks in a computer work environment