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Comment: Re:I hate personal definitions (Score 1) 164

by ShieldW0lf (#46785869) Attached to: 'Thermoelectrics' Could One Day Power Cars

I was apparently mistaken about there not having ever been a PDE powered flight

From France to London in the mid 1940s - get a grip before trying to lecture others who are not entirely keyboard jockeys.

Do you have any more information? I can't find any references to a successful PDE powered flight outside of the work being done by the Air Force Research Laboratory and Innovative Scientific Solutions, Inc.

Comment: Re:I hate personal definitions (Score 1) 164

by ShieldW0lf (#46780259) Attached to: 'Thermoelectrics' Could One Day Power Cars

As far as the difference between deflagration and detonation, you may find this helpful:

http://en.wikipedia.org/wiki/D...

Why do I say it's hoped that they will replace scramjets? Because aerospace and military engineers are spending millions of dollars working on trying to engineer them as a replacement for scramjets and hoping they succeed:

http://en.wikipedia.org/wiki/P...

I was apparently mistaken about there not having ever been a PDE powered flight... looks like researchers flew one for 10 seconds at an altitude of 100 feet with engines that create detonations at a frequency of 80 Hz.

I imagine a power station that could harness the power of nitroglycerin. Nitro is cheap as hell to make and releases incredible power... I'd love to try and build a plant that's buried deep in bracing rock and uses a very dense inert metallic alloy as a hydraulic fluid to harness the incredible power of cheap organic explosives.

Comment: Honeypot (Score 1) 98

by mfh (#46779917) Attached to: RCMP Arrest Canadian Teen For Heartbleed Exploit

I've talked to an accountant about this and we're both convinced this was an RCMP sting. They announced there was a vulnerability on their website about six hours before they patched it. That's either totally stupid and insane, or it was a police sting and they were just waiting to see who would be stupid enough to try and break in through the open door. Please have a seat.

Comment: Re:I wonder how much damage... (Score 3, Insightful) 250

by fermion (#46779659) Attached to: Apache OpenOffice Reaches 100 Million Downloads. Now What?
Excel is about the only component in the MS Office suite that is still arguably superior. When it came out on the Mac almost 30 years ago it was revolutionary. And this is from someone who was quite adept at Visicalc and Quattro. OTOH, it is my wish that no one use MS Powerpoint anymore. It is dated and ugly. MS Word is truly useful in a few use cases, buy mostly it is just that people know how to use to get simple tasks done and teaching them how to complete those tasks differently is cost prohibitive.

Due to the way MS products are licensed, and the cost of training, and the fact that the average person gets confused easily with software, it is cheaper for large organizations to buy the MS products for use by the minority of users that actually need it.

Comment: Depends (Score 2) 239

by fermion (#46778741) Attached to: SSD-HDD Price Gap Won't Go Away Anytime Soon
if you are talking about throw away worker drones or server machines, then no. There is no data on these machine, the costs to swap them out are minimal. I recall a place that had racks of a few hundred machines, a dedicated person to swap them out, and two died a day. Putting anything but the cheapest product in there would have been a waste of money. But the data machines, those were special. Probably cost more than the combined servers the fed to.

Likewise, worker bee machines that are pretty much dumb terminals are not going to use SSD. But other machines that people actually do and store work on, that may be something different.

Look, tape is on the order of penny per gigabyte. Hard disks are somewhere between 5-10 cents a gigabyte. SSD is about 50 cents a gigabyte. Many people still back up onto hard disk even though tape is more reliable. We are going to use SSD because there are benefits that justify the order of magnitude increase.

Comment: a few things (Score 1) 276

by smash (#46777989) Attached to: Ask Slashdot: System Administrator Vs Change Advisory Board

CM is there for both preventing fuck ups and dealing with them when they occur. First things first: do you have a test environment? If not, build one. Do you have documented processes? If not, document them.

Proper change management ensures that: 1. people in the group know what is going on. 2. you have a second/third set of eyes to ensure that you have both a plan, a backout plan (or plan B in case it can't be backed out) and a test methodology to ensure that a change hasn't broken things. 3. to make you think about the implications of what you are doing, and 4. that business stakeholders are informed and know how to plan around any impact both expected and unforeseen.

If you aren't doing all of those things already, sorry dude but you are just winging it. That's efficient, etc. until one day it all goes horribly wrong and you need to figure it out on the fly how to get back to normality, with unpredictable outage durations, etc. All of that should be worked out before going live with your changes.

Yes, it sounds like a lot of faffing about for no real benefit, but really, one day it will save your arse. And really, you will be surprised at just how many effects even a single change to a production system can have.

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