Challenge The protocols of today's Internet operate poorly when faced with operating environments characterized by very long delay paths, frequent network partitions, and severe power or memory constraints.

Solution A network architecture and application interface structured around optionally-reliable asynchronous message forwarding, with limited expectations of end-to-end connectivity and node resources.

Potential Impact DTN enables a range of applications to be used in environments with poor connectivity---from email and voicemail to offline search engine queries, electronic form filling, and "instant-enough messaging"---at a reduced cost.

Challenge The combination of security threats and the need for new services has created an unmet demand for general-purpose extensible Internet infrastructure, rather than the traditional special-purpose hardware routers.

Solution A combination of distributed software scheduling algorithms running on a cluster of off-the-shelf many-core servers.

Potential Impact Enable an extensible network infrastructure – one that is programmable, potentially lower-cost and more amenable to experimentation and evolution.

Challenge Any widely-distributed system needs to track its participating nodes, and be able to send messages among those nodes. This facility is called an overlay. It is difficult to design, build, and deploy an overlay suited to a particular application and environment.

Solution P2 is a system that uses a high-level declarative language to express overlay networks in a highly compact and reusable form.

Potential Impact This approach could provide not only simpler, safer pecifications for network protocols, but also the ability to query, monitor and control all aspects of the network' distributed state.

Challenge Enable alerts to be fired when unhealthy conditions are detected across a set of distributed monitors, without using much bandwidth.

Solution We design protocols for the monitors to communicate with a semi-centralized coordinator. The coordinator tells monitors how much data to send, and with what accuracy, so that the coordinator can fire triggers accurately whenever global conditions become unhealthy.

Potential Impact Fills an important gap in today's proposals for large-scale distributed monitoring.

Challenge Traditional methods of exploring interactions between people and devices, such as self-reporting, tend to be inaccurate because people have difficulty recalling details of mundane activities.

Solution Use a sensor-based visual record of the physical movement of people and devices in the home, to facilitate more accurate discussion during interviews.

Potential Impact Understanding how people interact with a growing number of portable electronic devices in homes could help in the design of devices and the architectural spaces that support them.

Challenge Understand how the future fabric of digital and wireless technologies will influence, disrupt, expand, and be integrated into the social patterns existent within our public urban landscapes; focusing on new forms of community, place, infrastructure, and traversal involving emotion, play, and wonderment.

Solution Provocative interventions, functional artifacts, and studies designed to engage people in direct discussions about their current and emerging public urban landscape and in the process, reveal new opportunities for technology in urban spaces.

Potential Impact By gaining a better understanding of what matters most to people in the daily experience of city life, researchers hope to inspire useful new technologies for urban dwellers.

Challenge The mobility of end hosts makes them good candidates to bring security threats into the enterprise network.

Solution Intel researchers are mixing graphical and statistical models to build profiles describing typical user communication patterns and application usage behavior. With these descriptions, anomalous behaviors such as scanning worms or denial-of-service attacks, are easily exposed and detected.

Potential Impact The ultimate goal is to enable designers to create more secure, efficient and reliable enterprise networks.