“Elvin is a network communications product with a difference; rather than messages being directed by applications from one component to another, Elvin messages are routed to one or more locations, based entirely on the content of each message.”
“Quenching is an unique feature of the Elvin service. It allows producers to receive information about what consumers are expecting of them so that they need only generate the events that are in demand.
This is important for some classes of producers where the act of producing the event is intensive.”
“It’s somewhat of a paradox that the flexibility of a system built with Elvin allows some parts to be made from non-updatable components such as PICs and embedded ROMs. But this is exactly the case. A
producer that is tightly coupled to a hardware component, such as a sensor in a car, does not need to be upgraded until the sensor or even car, is replaced. However, the way the information provided by the
sensor is used can evolve beyond the initial design.”
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Heads of Agency International Space Station
The heads of the International Space Station (ISS) agencies from Canada, Europe, Japan, Russia and the United States met in Tokyo, Japan, on March 11, 2010, to review ISS cooperation. From the left are Dr. Keiji Tachikawa, President of the Japanese Aerospace Exploration Agency, Charles Bolden, NASA Administrator; Jean-Jacques Dordain, Director General of the European Space Agency; Anatoly N. Permirov, Head of the Russian Space Agency; and, Dr. Steve MacLean, President of the Canadian Space Agency. With the assembly of the ISS nearing completion and the capability to support a full-time crew of six established, they noted the outstanding opportunities now offered by the ISS for on-orbit research and for discovery including the operation and management of the world's largest international space complex. The heads of agency reaffirmed the importance of full exploitation of the station's scientific, engineering, utilization, and education potential. They noted that there are no identified technical constraints to continuing ISS operations beyond the current planning horizon, and that the partnership is currently working to certify on-orbit elements through 2028. They emphasized their common intent to undertake the necessary procedures within their respective governments to reach consensus later this year on the continuation of the ISS to the next decade. Image Credit: JAXA
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