No-Cook Paleo! - Dessert Recipes: Ultimate Caveman Cookbook Series, Perfect Companion for a Low Carb Lifestyle, and Raw Diet Food Lifestyle by Ben Plus Publishing

Author:Ben Plus Publishing [Publishing, Ben Plus]
Language: eng
Format: epub
Tags: Non-Fiction, Cooking
ISBN: 9781496107954
Amazon: 1496107950
Barnesnoble: 1496107950
Goodreads: 21430522
Publisher: Createspace
Published: 2014-03-01T00:00:00+00:00

All of Torraway's signs were stable now, and we were getting ready to phase in the mediation circuits.

This time Roger was well briefed. Brad was with him every hour--after taking a large share of the President's ass-kicking, he was chastened and diligent. We deployed one task force to oversee the phasing-in of the mediation circuits, another to buffer the readout-readin of data from the 3070 in Tonka to the new backpack computer in Rochester, New York. Texas and Oklahoma were going through one of their periodic brownouts just then, which complicated all machine data handling, and the aftereffects of the flu were still with the human beings on the staff. We were definitely short-handed.

Moreover, we needed still more. The backpack computer was rated at 99.999999999 percent reliable in every component, but there were something like 108 components. There was a lot of backup, and a full panoply of cross-input paths so that failure of even three or four major subsystems would leave enough capacity to keep Roger going. But that wasn't good enough. Analysis showed that there was one chance in ten of criticalpath failure within half a Martian year.

So the decision was made to construct, launch and orbit around Mars a full-size 3070, replicating all the functions of the backpack computer in triplicate. It would not be as good as the backpack. If the backpack experienced total failure, Roger would have the use of the orbiter only 50 percent of the time--when it was above the horizon in its orbit and thus could interlink with him by radio. There would be a worst-case lag of a hundredth of a second, which was tolerable. Also he would have to stay in the open, or linked with an external antenna otherwise.

There was another reason for the back-up orbiter, and that was the high risk of glitches. Both the orbiting 3070 and the backpack were heavily shielded. Nevertheless they would pass through the Van Allen belts at launch, and the solar wind all through their flight. By the time they got to the vicinity of Mars the solar wind would be at a low enough level to be bearable-- except in the case of flares. The charged particles of a flare could easily bug enough of the stored data in either computer to critically damage its function. The backpack computer would be helpless to defend itself. The 3070, on the other hand, had enough reserve capacity for continuous internal monitoring and repair. In idle moments--and it would have many idle moments, as much as 90 percent of its function time even when in use by Roger--it would compare data in each of its triplicate arrays. If any datum differed from the same datum in the other arrays it would check for compatibility with the surround data; if all data were compatible, it would examine all three arrays and make the one aberrant bit conform with the other two. If two did not conform, it would check against the backpack if possible.

That was all the redundancy we could afford, but it was quite a lot.

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