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Comments

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UAV Operator Blames Hacking For Malfunction That Injured Triathlete

emj ... badabom (178 comments)

Thats the same kind of person who blaems typos on there keyboard.

I see what you did their!

about two weeks ago
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Unreal Engine 4 Launching With Full Source Code

emj Re:If it's such a great development environment... (149 comments)

In the old times, FPS was not about multiplayer. I stopped playing them around the time it became like that.

That would be around 1996 when Quake was released.

about a month ago
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Church Committee Members Say New Group Needed To Watch NSA

emj Re:really? (143 comments)

The devil you know.

about a month ago
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Prominent GitHub Engineer Julie Ann Horvath Quits Citing Harrassment

emj HR is not on your side (710 comments)

Which is why in civilised countries we have unions and employment law.

I was a bit sad when I read that she had to request HR to be present at a meeting with the boss, you need a union on your side when you have those conversations.

about 1 month ago
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How Do You Backup 20TB of Data?

emj Re:If you want to hoard bits... (983 comments)

If I were doing this with drives, I'd grab an 8x SATA card, 8 4TB drives, an external hot-swap shelf, and setup RAIDZ-2 with compression on it. .... Cost is about $1800. That's totally a backup. A second set of backups is another $1300.

Can somebody compare the cost for tape?

You pay about ~$1800-$2500 for tapes, a tape driver, and SAS card, depending on vendor, an extra 27 tapes to store 20TB again would be about $700. The big win is that the tape setup take less space, changing tapes every 800GB is not so hot though, but you get used to it. I've used 4 tape drives in parallel to be able to backup all data generated durng the day, it's ok, you learn to handle that with the morning coffee.

about a month ago
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Electric Bikes Get More Elegant Every Year (Video)

emj Re:Elegant isn't important. (164 comments)

"Bicycling is the most energy-efficient way to move,"
nope.

Yes it is. (I'm not going to bother with the rest since it's just your opinions)

about 2 months ago
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Electric Bikes Get More Elegant Every Year (Video)

emj Re:so its a moped? (164 comments)

You can not get a good bicycle that cheap, sure you can spend lots of time renovating old bicycles, but they probably did cost a lot more than $150 when new.

about 2 months ago
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Electric Bikes Get More Elegant Every Year (Video)

emj Re:Not in my experience (164 comments)

Out of about 80 bikes that are locked outside my building, only 4-5 are racing bikes. If I was in the Netherlands, Germany or Denmark it would be more like 1 / 80.

Far less than that, normally people do not use racing bikes for everyday use. I stood in a busy bicycle intersection and saw ~200 upright bicycles not one racing bike.

about 2 months ago
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Electric Bikes Get More Elegant Every Year (Video)

emj Re:Still ugly (164 comments)

If you just ride an hour or two on the weekend, then a cushy seat and upright posture feels comfortable. If you ride many more hours per week it's a prescription for saddle sores

I've biked 300km during three days in upright position, it's easy and I had not problem. Further, there are thousands of people doing at least 100 km a week in upright position over here.

about 2 months ago
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Game Developers' Quest To Cross the Uncanny Valley

emj Re:Citation Needed (134 comments)

'and narrative-driven adventures can seem more like interactive movies than games'

Citation Needed

You can watch The last of us as a movie instead of playing it. It's 4-7 hours depending on how much gameplay there is I guess. But live streaming or editing your game sessions is big business now, so I guess it might just be a shift in what is considerd entertainment.

"I make videos of me doing stuff, so you don't have to!" - Washington.

about 2 months ago
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Should Everybody Learn To Code?

emj Re:Opportunity: yes. Mandatory: No (387 comments)

If all phones were unlocked and open sourced this would not be a problem, a phone from 1999 would be pretty ok to code on. That's one reason I really like GPL for consumer products.

about 2 months ago
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Should Everybody Learn To Code?

emj Re:clickbait (387 comments)

Though for me Logic 101 was a lot better for my thinking than learning to code.

about 2 months ago
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Ask Slashdot: How To Reimagine a Library?

emj Re:Most visitors... (231 comments)

Actually, I recently bought a book on Google Play (but I guess it's the same on all platform) and I could start reading in 5 seconds. In the end I returned the book because it was DRM riddled, which was also pretty fast (20 seconds), but it's still cumbersome to manually return those 15 books you want to leaf through.

about 3 months ago
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Mozilla Is Mapping Cell Towers and WiFi Access Points

emj paranoid people shouldn't use Wifi. (113 comments)

Considering how easy it is to map APs I don't see why they should have to care about _nomap.. I don't see why you would want opt out.

about 3 months ago
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Mozilla Is Mapping Cell Towers and WiFi Access Points

emj Re:Mapping Wifi? What for? (113 comments)

t would seem that its essentially useless as soon as a certain percentage of SSIDs change.

Then you map it again. It's not that hard especially if it works ok for ~2 years, and you manage to get an installed base during that time. Every time a phone says "i can see X Y Z", and Z isn't in the DB you will now that Z is near X Y.

about 3 months ago
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U.S. Teenagers Are Driving Much Less: 4 Theories About Why

emj Re:Teens and adults driving less: yes (635 comments)

Will we all be riding bicycles or using public transportation or some other non-personal transportation option? Are we all destined to become herd animals?

You have bought into too much from car comercials, a car is a the ultimate herd animal, at least most of the time, except those rare occasions you drive to the beach a coast along in the turf at 90 mph.

about 3 months ago
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U.S. Teenagers Are Driving Much Less: 4 Theories About Why

emj Re:I drive more (635 comments)

I love driving. It's traffic I hate!

I love traffic that's why I use a bicycle, 20 miles is ok to do by bike. You are not alone in not liking traffic from a car, there are recent studies that says that if when you are in a car you will enjoy the city less than when on foot or on a bike.

about 3 months ago
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Mozilla Is Mapping Cell Towers and WiFi Access Points

emj Re:Privacy (113 comments)

What's the point of this?

So they can sell your location to advertisers?

I know for a fact that Mozilla doesn't want to do that, it's stated in the project goals. The point is that it's eays to find out location without having to turn onf/have access to a GPS.

about 3 months ago

Submissions

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Booting Linux in five seconds on EeePC

emj emj writes  |  more than 5 years ago

emj (15659) writes "At the Linux Plumbers Conference Arjan van de Ven, Linux from Intel demonstrated a Linux system booting in five seconds. The hardware was an Asus EEE PC, which has solid-state storage, and the two developers beat the five second mark. They had to hold up the EEE PC for the audience, since the time required to finish booting was less than the time needed for the projector to sync. "Done booting means CPU and disk idle," Arjan said, but it did not include bringing up the network completly."
Link to Original Source
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Open Source GSM base station software

emj emj writes  |  more than 5 years ago

emj (15659) writes "Software defined radio has really come a long way, here's a summary about the OpenBTS software that lets you run a GSM base station with GNU radio. All software isn't available yet, but the OpenBTS people made a field test at Burningman in August and have a nice page describing the tech they brought with them. If that's not enough, the hardware they used can be used with GPS receiver software as well."
Link to Original Source
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Screen with 180 degress field of view

emj emj writes  |  more than 5 years ago

emj writes "Who wouldn't want to be immersed in a 3D world, a gamer has actually has invented just this, jDome a 180 degree FOV screen. All you need is a semi-transparent back projected dome, and setting the in game field of view to 180. At a preorder cost of just $200, it is a lot of immersion per dollar, considering that a full VR-cube will cost you a million bucks. Watch the high res video of jDome or settle for the YouTube version on the home page."
Link to Original Source
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Laptop memory upgrade without getting heat

emj emj writes  |  more than 5 years ago

emj writes "Is it possible to upgrade the memory of an old laptop without getting a big heat output from the new memory modules? I recently added an old 256MB module to my laptop, but this increased the heat output and is making the fan run non stop. What should you look for in memory chips when you want low heat, low power and lots of RAM? (heat sinking is not an option)"
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Drag and Drop upload on webpages

emj emj writes  |  more than 6 years ago

emj (15659) writes "Now there is an extension for Firefox that can upload files by using drag and drop, some sites e.g. Gmail you can now drop several files and they will directly be added to the upload form. The question is when this will become standard in all browsers considering the amount of people doing this the first time they try to attach a file."
Link to Original Source
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Command Line life partner wanted

emj emj writes  |  more than 6 years ago

emj (15659) writes "Craiglist offers an interesting approach to finding a life partner , summmary: "There is a sad truth to the world today. I am part of a dying breed of people known as "shell users." ... Because there are fewer and fewer of us, I must help keep our lineage alive. I am looking for someone to help me do this. I need a woman (obviously) who is willing to raise a child with me in the method of Unix."."
Link to Original Source
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Mounting filesystems with out root

emj emj writes  |  more than 6 years ago

emj (15659) writes "An LWN article talks aboutpatch by Miklos Szeredi enables an unprivileged user process to call the mount() system call and and have that call actually succeed. The setuid mount utility is no longer needed, giving users more flexibility in setting up their environments. One might well wonder why this change to mount() is called for, given that users have been able to do unprivileged mounts for years, but this lets people mount without editing fstab,"
Link to Original Source

Journals

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emj emj writes  |  about a year ago

I really can't stand these audio based ads that Slashdot has started running, I have no problem with advertisement I think it actually adds to the experience, lots of stuff that I use I've found via ads. So please slashdot stop running these Microsoft server 2012 or what ever, or at least make them pay more, I mean I do notice them more when they start playing in some background slashdot tab.

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My URL is my content

emj emj writes  |  more than 5 years ago

A great inebriate hacker once told me "I schould build a content provider service, where the content is in the URL"... It took me about two years to understand what he ment, I think he ment that you can store data in "the cloud" or in the ether between the tubes. So I give openssl and some perl to make it look better:

echo "oh man where is this stored really? The intertubes?" |openssl base64 | perl -pne 'BEGIN{print "data:text/plain;base64,"} chop; END {print "\n"}'

Result:

data:text/plain;base64,b2ggbWFuIHdoZXJlIGlzIHRoaXMgc3RvcmVkIHJlYWxseT8gVGhlIGludGVydHViZXM/Cg==

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Making sha1 hashes for backup and integrity checking..

emj emj writes  |  more than 5 years ago This will link one hash to one file, so if two files have the same hash the latter will overwrite the formers name. Thanks to Perl oneliners and lost+found recovery for inspiration.

find -type f -print0 |
xargs -0 openssl sha1 |
perl -ne '
sub parsesha1{
$sha1=substr($_,-41,40);
$filename=substr($_,5,-44)
}

&parsesha1;

$file_hashes{$sha1}=$filename;

END{
foreach $hash (keys %file_hashes){
print "$hash:",$file_hashes{$hash},"\n"}
} '

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