This paper is dedicated to Philip J. Stone III, who first put me online in 1965.

In order to enable the search and retrieval of video from large archives, we need a representation language for video content. Although some aspects of video can be automatically parsed, a sufficient representation requires that video be annotated. We discuss the design of a video representation language with special attention to the issue of creating a global, reusable video archive. Our prototype system, Media Streams, enables users to create multi-layered, iconic annotations of streams of video data. Within Media Streams, the organization and categories of the Icon Space allow users to browse and compound over 3500 iconic primitives by means of a cascading hierarchical structure that supports compounding icons across branches of the hierarchy. A Media Time Line enables users to visualize, browse, annotate, and retrieve video content. The challenges of creating a representation of human action in video are discussed in detail, with focus on the effect of the syntax of video sequences on the semantics of video shots. 1 Introduction: The Need

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k, community and domesticity have moved from hierarchically arranged, densely knit, bounded groups to social networks. In networked societies: boundaries are more permeable, interactions are with diverse others, linkages switch between multiple networks, and hierarchies are flatter and more recursive. People maneuver through multiple communities, no longer bounded by locality. Organizations form complex networks of alliances and exchanges, often in transient virtual or networked organizations (Bar & Simard, 2001). Workers --especially professionals, technical workers, and managers -- report to multiple peers and superiors. Work relations spill over their nominal work group's boundaries, and may even connect them to outside organizations. In virtual and networked organizations, management by network has people reporting to shifting sets of supervisors, peers, and even nominal subordinates (Wellman, 2001). How people learn is becoming part of this paradigm shift. There has been some mov

ABSTRACT. This paper suggests that from a cognitive-evolutionary perspective, computational media are qualitatively different from many of the technologies that have promised educational change in the past and failed to deliver. Recent theories of human cognitive evolution suggest that human cognition has evolved through four distinct stages: episodic, mimetic, mythic, and theoretical. This progression was driven by three cognitive advances: the ability to “represent ” events, the development of symbolic reference, and the creation of external symbolic representations. In this paper, we suggest that we are developing a new cognitive culture: a “virtual ” culture dependent on the externalization of symbolic processing. We suggest here that the ability to externalize the manipulation of formal systems changes the very nature of cognitive activity. These changes will have important consequences for mathematics education in coming decades. In particular, we argue that mathematics education in a virtual culture should strive to give students generative fluency to learn varieties of representational systems, provide opportunities to create and modify representational forms, develop skill in making and exploring virtual environments, and emphasize mathematics as a fundamental way of making sense of the world, reserving most exact computation and formal proof for those who will need those specialized skills.

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this paper, the Internet became just another communication tool among the many ways people could interact, and contact in one way often led to contact in another. The asynchronous, immediate, low cost nature of sending messages over an email list, made NET-L the ideal method of organizing residents in situations that otherwise would have required extensive organizational time and energy. Here's a typical account from NET-L of how wired residents used the list to organize community events: This is such a great community. I have got a lot of positive feedback about a street party. I called the town, and was told that we have to write a letter to the Director of Corporate Services, stating where, when, why, how. It takes about 2 weeks for them to approve it. The Town will then provide barricades to block off the street

. Mandala is a system for using images to represent, access, and organize web information. Images from a web page represent the content of the page. Double-clicking on an image signals a web browser to display the associated page. People identify groups of images visually and share them with Mandala by dragging them between windows. Groups of image representations are stored as imagemaps, making it easy to save visual bookmarks, site indexes, and session histories. Image representations afford organizations that scale better than textual displays while revealing a wealth of additional information. People can easily group related images, identify relevant images, and use images as mnemonics. Hypermedia systems that use image representations seem less susceptible to classic hypertext problems. When image representations are derived from a proxy server cache, the resulting visualizations increase cache hitrates, access to relevant resources, and resource sharing, while revealing the dynam...

The Internet presents a paradox of place. On the one hand, it is the principal means by which the “global village ” communicates – to use Marshall McLuhan’s evocative phrase (1962). Its ability to connect people at the speed of light reduces the importance of spatial distance. As long as people and organizations are on the Internet and as long as the Internet is not clogged with too much traffic, place may no longer matter as much for contact. What matters is the interconnection, not the place (Wellman, 2001). On the other hand, people do not exist as ethereal creatures. They have to connect to the Internet – and each other – from somewhere. In the great majority of situations, they are physically tethered by wires connecting their personal computer to the Internet. Even when their connection is wireless – a small but a growing minority – at any given moment, they are communicating from a place. They may be sipping a café latté at a Starbucks coffee shop or they be walking through a wireless friendly university campus. Yet, they are somewhere. Does the place where one communicates matter? It undoubtedly does for many

The Virtual Library museums pages (VLmp) were started as a personal project in 1994, forming part of the Virtual Library distributed information repository initiated by the original inventors of the World Wide Web. The VLmp resource provides a leading directory of online museums and associated resources which has grown exponentially in size and use since its inception. In 1996 the directory was adopted by the International Council of Museums (ICOM), helping to ensure its long-term future. This presentation provides a brief history of the development and use of VLmp, and considers its possible future directions.