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Comment Re: Weirdly specific statement (Score 1) 55

What is the limiting factor? Buildup of CO2?

People need a certain amount of oxygen for their metabolism, you need to carry that much. CO2 effects the blood pH: too little and the body is too alkaline, too much and it's too acidic. So, you need to maintain a precise amount of CO2 and remove the rest. The scrubbers in the space shuttle were able to regenerate the CO2-absorbent material after use, so there was use of power but material wasn't consumed.

Beyond this, you need to control temperature and humidity. The other requirements than atmosphere for crew survival are that you water, feed and shelter the crew, maintain orientation, and maintain a G-force envelope that doesn't injure the crew.

Submission + - September 19th SpaceX Launch will be visible across California, Nevada. (reddit.com)

Bruce Perens writes: The nighttime launch of a SpaceX Falcon 9 containing Iridium satellites at 9:49 PM PST Monday September 19th from Vandenberg AFB SLC-4 is likely to be visible across California and in some Nevada locations. Although Vandenberg has a landing pad for the Falcon under construction, this will probably be a drone-ship landing and some California observers might see two of the landing burns.

Comment I shoot events as a sideline and have done since (Score 1) 356

the late '90s in digital.

I have a library of about 180k photos. You retain originals in case someone goes back to a contact sheet and wants a reprint or an enlargement a decade later or something. At a typical event I will shoot between 100 and 1,000 images. Sometimes, depending on conditions, I will shoot RAW.

My current gear is 24mp SLR and generated files are on the order of 12-15MB each for JPG images. I can easily lay down 12GB a shoot or 50GB in a week.

I keep an online 12TB RAID-1 library and then have 3 backup sets on LTO, rotated, with one set always offsite.

I know a person that does video editing and production as a sideline for corporate clients, mostly working on online ad videos and 30-second spots. They keep archives as well, because it's not uncommon for a client to come back several times over a period of several years to want minor tweaks to something that's already run (for versioning or feature changes, slightly different voice track, color edits, text overlay edits, etc.). They have even larger data needs.

Point being: even many individuals and small businesses *do* have legitimate, productive needs, and your condescending view is just a tad narrow.

Comment DLT or LTO (i.e. tape). (Score 1) 356

Some people swear by optical media for archival and backup, but I've had trouble restoring data with different optical devices and media just 3-5 years after write, so I don't trust them.

Tape, on the other hand, is venerable and proven—so long as you stick to what the big boys use.

At the top end, DLT and LTO are both still very expensive, but as they age out, they end up on eBay relatively inexpensively. The mechanisms are very robust, repairs and replacements are readily available, media is in channels, compatibility is very good.

You can pick up a used-but-verified LTO-4 drive for $200 on eBay. SAS controller, $20-$40. Media ~$20/ea for 800GB/1600GB per cartridge. So you can get rolling at less than $300 for a complete backup and go from there.

If you want to run cheapskate, DLT-VS1 ("DLT-V4") drives often come up on eBay tested and working for $80-$100 for SATA, eliminating the need for a host adapter of any kind. The VS-160 tapes (160GB/320GB on a DLT-V4 drive) can pop up in boxes of 10 for $100-$120. So if you're patient, you can get rolling there for under $200 if you get lucky, though you'll wait around a long time and switch a lot of tapes to get your full backup done.

Just avoid helical scan tapes at all costs (AIT, DDS/DAT). The reliability is crap and the media quality is crap. Wine linear tape (DLT, LTO) is what you want if you're going to run data onto tape for backups. This opinion comes from two decades of experience.

Comment Re: It's research... (Score 1) 146

Tee hee! Back in the day, one of the points I made to the old farts was that I had passed the 20 WPM exam and had my K6BP call to show for it, but refused to use the code on the air until the requirement was gone. Nobody spat at me or punched me out, the worst that ever happened was a poor behaving slim using my call and a postcard from the ARRL observer who thouht it was me.

Comment Re:It's research... (Score 3, Informative) 146

WSPR tells you when communication paths are open between two points at a specific frequency and S/N ratio. This is useful but does not span the extent of research that HAARP is directed to. One of the most interesting things about HAARP is that it can incite the formation of radio-reflective regions in the ionosphere. That takes a lot of power.

Comment Very fuzzy thinking. (Score 1) 563

We are talking about two different things here. Secure retention and secure deletion.

Clinton was very cavalier about secure retention.
She was apparently very serious about secure deletion.
And her argument is that the things retained with poor security were those of state, while those deleted with apparently deliberate security were personal.

One could easily thus infer that she wasn't particularly concerned about protecting the secrets of state, but was very concerned about ensuring that her own secrets never saw the light of day. Whether or not that's the case is another matter, but you're conflating a whole several things together here that are in fact conceptually separate—retention, deletion, national, personal.

Submission + - How the new season of "Halt and Catch Fire" recreated 1986 (fastcompany.com)

harrymcc writes: The third season of AMC's "Halt and Catch Fire," a drama about the tech industry in the 1980s, debuted this week. The new episodes are set in San Francisco and Silicon Valley in 1986, and are rich with carefully-researched plot points, dialog, and sets full of vintage technology (including a startup equipped with real Commodore 64s and a recreated IBM mainframe). I visited the soundstage in Atlanta where the producers have recreated Northern California in the 80s, and spoke with the show's creators and stars about the loving attention they devote to getting things right.

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