Domain: swin.edu.au
Stories and comments across the archive that link to swin.edu.au.
Comments · 155
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Re:Look harder
//It was quickly realised that this dipole was the result of our Galaxy moving at 600 km/sec with respect to the CMB radiation//
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Re:OpenWRT for $25
Those are default values for the configurable connection tracking limit which take into account that you will need RAM for other things as well. On a router, these connections only pass through, so there is very little overhead on top of the connection tracking. I've seen numbers between 200 bytes and 1KB per connection for tracking. The OpenWRT default limit for the number of tracked connections is 16384, which in conclusion would need somewhere between 3 and 16 megabytes of RAM. On a router with 64MB of RAM, the configurable limit should kick in first, well before the router runs out of RAM. The technical report for the traffic classification algorithm presented here lists a 32MB OpenWRT router which is technically similar to the ones we're talking about as capable of maintaining tracking of 32000 connections with OpenWRT and 15 of free RAM after boot.
You might run into problems if you have applications with many simultaneous connections on devices which don't disconnect cleanly and thus leave the connections orphaned. The default values for the tracking timeouts keep orphaned connections in the tracking table for hours or even days. Torrent users might want to lower the timeouts and use keepalives to prevent long lived connections from being dropped.
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Re:xkcd
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Re:+5 New stuff
Wow. Good question. Each of the modules has its own readme with info on how to implement it. Obviously, you no longer need to go through the build process if your using FreeBSD 9. I don't know of any new docs or a howto. Sorry. However, the info from each of the readme's on this post help. There should be more up to date readme files with FreeBSD 9 but I haven't checked.
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Re:+5 New stuff
Wow. Good question. Each of the modules has its own readme with info on how to implement it. Obviously, you no longer need to go through the build process if your using FreeBSD 9. I don't know of any new docs or a howto. Sorry. However, the info from each of the readme's on this post help. There should be more up to date readme files with FreeBSD 9 but I haven't checked.
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Bad pop-sci writing makes kittens sad
here is the actual press release, which (unlike that article) doesn't skip over what they actually did.
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Actually it's 370 km/s towards Virgo
If you want to quote big speeds against something, that should be something *near* you, something that runs the risk of crashing. 17000 mph against the earth that's hundreds of miles away is totally meaningless.
Now, if you want to quote some "absolute" velocity, then the only reference that can be considered valid, according to Mach's principle would be against the "fixed distant stars", which means cosmic microwave background.
Then we can say we are all moving at 370 km/s towards the Virgo constellation (note the link says the whole Milky Way galaxy is moving at 600 km/s towards Centaurus but we have to subtract the speed of the earth relative to the galaxy as a whole. Longer explanation here).
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Re:Shocking secret of open sourceActually there is a way. Virtual machines. You can compare the same with running an NT kernel to boot up Solaris - there's no logic in pointing this out at all. One example of code that can be integrated into the Linux kernel (or loaded as a module) that "runs under Windows" is the ext2 driver. http://uranus.it.swin.edu.au/~jn/linux/ext2ifs.htm.
I am a little curious on if this ext2 driver that's used uses gpl code. Anyone know more info about it? It's only freeware; closed source.
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Random Noise Order?
How many elliptical galaxies are there? There are about 130 billion galaxies in the observable universe, so 200,000 is just about 1.5 millionth of all of them. The paper started with 390,000 galaxies, for reasons I couldn't decipher, from which it selected these uniformly oriented galaxies. But if the odds of them being mutually aligned is about 1 in a million, and the resolution of all their possible alignments is less that 1 per million, than this ordering seems inevitable, and just a self-selection from a randomly oriented large sample.
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Or add lag to probable cheaters
"..and their cheating fun ruined by us
/kill'ing them.."
Another approach was prototyped a few years back by a research group in Australia, which involved adding latency to those presumed to be cheating... Enough to make the cheater think the network was playing up (encouraging them to go away) rather than pissing the cheater off (and inviting spiteful repeat attempts at disrupting the game). Not sure how good the scheme worked, though.
Look for IGLU under http://caia.swin.edu.au/genius/tools.html, or the README at http://caia.swin.edu.au/genius/tools/iglu-0.2-READ ME.txt -
Or add lag to probable cheaters
"..and their cheating fun ruined by us
/kill'ing them.."
Another approach was prototyped a few years back by a research group in Australia, which involved adding latency to those presumed to be cheating... Enough to make the cheater think the network was playing up (encouraging them to go away) rather than pissing the cheater off (and inviting spiteful repeat attempts at disrupting the game). Not sure how good the scheme worked, though.
Look for IGLU under http://caia.swin.edu.au/genius/tools.html, or the README at http://caia.swin.edu.au/genius/tools/iglu-0.2-READ ME.txt -
Re:You tried to parod a humorous commercial?
Linus Torvalds pronounces it 'leenucks' - http://uranus.it.swin.edu.au/~jn/linux/saylinux.h
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Re:Only 1 (one) billion light years? Aww, come on.
Using http://astronomy.swin.edu.au/~elenc/Calculators I get a redshift of z=0.073 roughly equal to 1 Glyr (approx 307 megaparsecs)
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Re:As a new user of Linux, I have to say... it suc
it's not difficult , it took me about 3 minutes to get it working... http://uranus.it.swin.edu.au/~jn/linux/explore2fs
. htm -
Re:MS Grasping for Straws
through cygwin/mingw, if it runs on linux it's got a great chance of compiling or already being available for windows. heck, i can already run ALL of the kde environment inside of windows through cygwin.
if dd does the job, why not spend 1 second googling and use dd for windows? and what, the dos/win "format" doesn't write enough zeroes? fdisk and mmc disk management don't really delete partitions when they say they do?
just because you can't find the software doesn't mean it doesn't exist. take a page out of the linux rtfm mentality and start learning. -
Use the classic CONREC routine
Check out http://astronomy.swin.edu.au/~pbourke/projection/
c onrec. Originally written by Paul Bourke and published in Byte magazine (back when it actually contained code). I've used it very succesfully in the past. It does assume that the input function has been sampled on a rectangular grid. If you don't have such a grid, you'll have to use a different technique. -
Re:2D contouring
Good 2D contour plotting is not easy (I know!!!).
Pardon me, I'd like to make a correction. Good 2D contour plotting from scattered point data is not easy. For contour plotting from a regular grid, the marching squares algorithm is simple, easy to implement, and works pretty well. Run it several times with different reference values to get all the contours you want.
The only problem I can think of is that it generates polygonal contours, but that shouldn't be a problem if you use a fine enough grid resolution. Now if the data itself has low spatial resolution, you could still create a denser grid using, say, cubic interpolation.
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Better than innovation
Really, rather than an a whole new file system, I'd rather have native support for EXT3.
Yeah, I know about ext2ifs. But I'd really rather install windows on an EXT3 partition, rather than being stuck with NTFS or a FAT32 partition arbitrarily limited to 32 GB. All this makes multibooting a PITA.
(Or they can open up the NTFS spec so I can read/write in linux, but we all know it'll be a cold day in hell before that happens.) -
He could have been truly clueless
I am told that Sen. Joe McCarthy (who easily wrecked as many lives as Lay) couldn't understand why anyone would be unhappy with him. I'm not saying he was a psychopath
... well maybe.
Just in case, here's a link to the psychopathy checklist:
http://www.swin.edu.au/victims/resources/assessmen t/personality/psychopathy_checklist.html -
Linux partition support under Windows
the filesystems used in linux are free and open.
Indeed. And in fact you see a lot of implementations for windows of which a lot are based on the open-source code.- explore2fs application that reads files from an ext2/ext3 partition, with LVM2 support
- ext2ifs old project by the maker of explorefs2, native reading support of ext2/ext3 in windows NT and up
- ext2fsd native reading support of ext2/ext3
- ext2ifs NON-opensource (maybe violating GPL ?) native read/write support for ext2 (and ext3, but the driver could fuck-up the journaling if partition wasn't unmounted clean in linux). Has a nice GUI to assign drive letters to partitions.
- rfstools and GUI Yareg application that reads files from an reiserfs partition.
- rfsd - native reading support for reiserfs
This shows that :- It is possible to add access to linux partition in windows
- Even write access is possible and currently the non-open source ext2ifs provides a solution that can be read/written by both OS and which is a little better than FAT32
- although Windows has no propper device mapper but only Dynamic Drives, LVM2 data can still be accessed (although not with a native driver).
- None of this numerous attempt is done by Microsoft. This show how much they want to play nice with the others
Meanwhile, the opensource community is trying to play nice with Microsoft's OS. -
Linux partition support under Windows
the filesystems used in linux are free and open.
Indeed. And in fact you see a lot of implementations for windows of which a lot are based on the open-source code.- explore2fs application that reads files from an ext2/ext3 partition, with LVM2 support
- ext2ifs old project by the maker of explorefs2, native reading support of ext2/ext3 in windows NT and up
- ext2fsd native reading support of ext2/ext3
- ext2ifs NON-opensource (maybe violating GPL ?) native read/write support for ext2 (and ext3, but the driver could fuck-up the journaling if partition wasn't unmounted clean in linux). Has a nice GUI to assign drive letters to partitions.
- rfstools and GUI Yareg application that reads files from an reiserfs partition.
- rfsd - native reading support for reiserfs
This shows that :- It is possible to add access to linux partition in windows
- Even write access is possible and currently the non-open source ext2ifs provides a solution that can be read/written by both OS and which is a little better than FAT32
- although Windows has no propper device mapper but only Dynamic Drives, LVM2 data can still be accessed (although not with a native driver).
- None of this numerous attempt is done by Microsoft. This show how much they want to play nice with the others
Meanwhile, the opensource community is trying to play nice with Microsoft's OS. -
Re:Whatever...try fat32 partition
If you know of a Windows ext3 or Raiser driver, then please tell me. Basically, nothing has changed.
Well, instead of moaning about the non-existence of something that you've clearly not checked for, you could always try this site, followed by this one, this one, this one, this one, this one, and this one, plus many others.
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Just share your Ext2 / 3 Partitions with Windows
There's no real need to store your data on partitions that are exclusively accessible to Windows.
Simply make your data partitions ext2/3 and access them in Windows Vista with Explore2FS. A commenter in this recommendation of Explore2FS claims that it works fine in Vista Beta 1, so it's moderately safe to assume that it will work in subsequent iterations.
Also, there is an Ext2/3 filesystem driver for Windows which works in XP, and may or may not be ported to Vista as well (it may even work already, but I haven't seen any evidence for this).
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Are the laws of physics changing themselves ?Being an amature scientist (engineer by profession) I always wonder why the laws in physics be constant as well ? Never got any satisfactory (and comprehensible) answer yet. To certain extent, it is equally important as 'changing' constants as well.
Also I would like to know little more about the error analysis here. A claim like 0.002% should be carefully checked to make sure about the measurement limitations etc.
Readers are directed to another good article (not flooded with scientific jargon).
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Re:Dual Boot danger
Sample of an opensource ext2fs reader for Windows: http://uranus.it.swin.edu.au/~jn/linux/explore2fs
. htm
Sample of an opensource reiserfs reader for Windows: http://yareg.akucom.de/index.html
Don't know if they can write at all, but, I'm sure if you googled around a little more you'd find one that did. The point is, it's definitely out there and the code is even available for a lot if not all of them.
That said, the real idea is generally to infect via things like Samba shares. I don't think the virus relies on the user to be dual booting since probably in the majority of the setups you'll be running one or the other all the time not rebooting frequently. A lot of times, such as mine, you'll have windows systems behind linux systems acting as firewalls/routers and servers, and I'm thinking that's more the kind of thing they're really interested in.
Oh, and offtopic just a smidge, but, on a directly related note, there is a swap partition driver for Windows, which you can find info on here: http://www.acc.umu.se/~bosse/ It's offtopic in that it's useless to write to a linux swap partition to infect linux since linux treats it as garbage on every bootup unless I'm mistaken. However, one security vulnerability in windows supposedly has to do with the swap file, hence an option to wipe the swap on reboot. Unfortunately, the wipe takes a very long time. Since swap is considered garbage on every boot (including by this driver) it will be seen as a blank filesystem each time. In other words, it can be handy to set this driver up correctly (be careful to get it right though so you don't damage anything else) and then move the Windows swap file onto it. This way you have a partition dedicated to the swap file (which also means you no longer have all that harddrive space just wasted for nothing) and it starts over from scratch on every reboot too. -
Re:Get your Linux on...
http://uranus.it.swin.edu.au/~jn/linux/bootlinux.
h tm
Lets you point the NT bootloader at a Linux partition.
I suspect, however, that if Boot Camp uses a bog-standard BIOS compatibility module for EFI, Linux will just work, except for the ATI RADEON x1600 drivers, which don't exist yet.
I'll try it out soon :) -
Re:Searching the PDF install docs for Linux...
If Windows can boot....
... So can Linux.
http://uranus.it.swin.edu.au/~jn/linux/bootlinux.h tm
Boot Camp -> Select Windows -> NT Bootloader -> Select Linux.
But, I can give you the reason Apple doesn't support Linux on Boot Camp. It's very simple; the ATI drivers for the x1600 simply don't exist for Linux yet. ATI is already taking lots of heat for not supporting the X1600 in linux, and Apple providing a dual boot solution that won't run linux on the Macbook pro and iMac (but will on the Mac Mini!) will be a very firm, very solid kick to ATI's nuts. -
Re:Not sure of that...
http://uranus.it.swin.edu.au/~jn/linux/ext2ifs.ht
m
This is what you want. -
Re:Food chainThere are infact several choices of upto date maintained Ext2/3 drivers for Windows.
- ext2fsd which has support for Win64 (x64)
- ext2ifs by John Newbigin (the one linked by parent). It says on the website "This version probably does not work under XP SP2".
- ext2ifs by Stephan Schreiber. It's freeware but doesn't appear to be Open Source (so presumeably contains no GPL'd code). There are Windows XP screenshots on the site and it's x86 only.
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Swineburne University
Do what Swinburne University does, one year industry placement is a requirement to graduate. Consequently, industry knows where to get the upcoming bright young things and students+staff try very hard to place everyone.
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Here you go (sort of)
http://www.fs-driver.org/
http://uranus.it.swin.edu.au/~jn/linux/ext2ifs.htm
http://ext2fsd.sourceforge.net/
http://freesourcecodes.tripod.com/ext2.htm
http://p-nand-q.com/e/reiserfs.html
http://www.wolfsheep.com/map/#RFSGUI
http://www.it.fht-esslingen.de/~zimmerma/software/ ltools.html
The above links were all gathered from http://uranus.it.swin.edu.au/~jn/linux/ext2ifs.htm I've not tried any of them, but this one looks the most polished. YMMV, knock yourself out, etc. -
Here you go (sort of)
http://www.fs-driver.org/
http://uranus.it.swin.edu.au/~jn/linux/ext2ifs.htm
http://ext2fsd.sourceforge.net/
http://freesourcecodes.tripod.com/ext2.htm
http://p-nand-q.com/e/reiserfs.html
http://www.wolfsheep.com/map/#RFSGUI
http://www.it.fht-esslingen.de/~zimmerma/software/ ltools.html
The above links were all gathered from http://uranus.it.swin.edu.au/~jn/linux/ext2ifs.htm I've not tried any of them, but this one looks the most polished. YMMV, knock yourself out, etc. -
A bit of geometry would help...
Granted, I usually do this in CAD, but what I do there is to draw two circles with the radius you want at two of the points, and then the center of the circle you really want will be one of the two intersection points of those circles. From there, use that as your center, draw in your circle and erase the other two circles used in that construction.
Now, if you don't know which radius is required for that (ugh!), you may have to do a bit of math:
http://astronomy.swin.edu.au/~pbourke/geometry/cir clefrom3/
And yes, it is a pain in the ass. -
Re:Fat(32) is useful in linux
I have had some good experience with EXT2 IFS. It lets you mount EXT2 and EXT3 drives in Windows. Reading and writing both worked well.
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Re:Thanks a lot AppleMan, yeah, nothing as ugly as a closed format, right? Not to mention all those other closed formats to which you're limited.
I'm as much in favor of competition in markets as anyone else, but the particular complaint you make is pretty silly.
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Re:Pentagon at war with the Right over science?
Yup. I warned the hippies about this years ago, actually. See http://www.swin.edu.au/chem/complex/vp/vp04/vp04.
h tml Search the page for my name, "Tobis", and read what I wrote about this in 1996. And don't say I didn't warn you. mt -
Re:able to read ext2/3 partitions from within wind
Haven't tried either of these but:
Appears to be a driver:
http://sourceforge.net/projects/ext2fsd
Standalone file explorer:
http://uranus.it.swin.edu.au/~jn/linux/explore2fs. htm -
Re:What ever happened to easy backups?
"Oh, not available for Windows, so you'll have to buy a product instead. But isn't dd much easier than using a program that expires after 270 days."
Check here, and after your done, go buy yourself a clue before you post utter bullshit again. -
Re:Graphical stuff it the way to go
On the other hand, it was a BASIC Sierpinski Gasket generator that first got me seriously interested in mathematics, and computational mathematics in particular.
Sierpinski gaskets are particularly good for this situation. Think of it this way: it's Pretty Pictures, combined with a really easy explanation ("You draw a triangle, put down your pencil, and roll this die. If it's 1 or 2, go halfway to this corner. If it's 3 or 4 (etc.) Then do it again. See what picture you get."), and simple code where you can point out "Here's where I go halfway to a corner. What if I went 1/4 of the way there? Give it a try!" Or, "here's what it looks like if every time you go to the top, you make a green point, every time you go left, you make a blue point..."
So yes, fractals could make a very good choice. It'll keep attention for a bit, and maybe even get some kids interested. -
Re:How about Rieser FS (or JFS or XFS)
Yes, Windows most likely can support that. I mean, it does support ext3, ReiserFS, and even ext2 with write support. So I think there's nothing technically in the way. The problem is probably being lack of driver developers.
;-) -
Re:Just state machine?
I'd like to see you try to construct an infinite tape.
Easy ;) -
Re:I'd reply to this
That's easy in linux.
So...
Here's dd for Windows for most /.ers out there...
http://uranus.it.swin.edu.au/~jn/linux/rawwrite/dd .htm -
Re:four-seven
He'll probably want to talk to this guy.
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Re:Interopability
Well you can get ext2 drivers for Windows NT/2000XP. I'm sure the same principle could be used for other file systems.
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EXT2IFS is a start in that direction...
There is a Windows "Installable File System" for accessing ext2/ext3 partitions in read-only mode. See this website for EXT2IFS
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Re:Windows port?
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Re:That's backwards"but I think the idea is that you're supposed to use a GUI that creates that text file for you."
Not really. While you might use a GUI modler to make some of the 3D models, it's easier to do most of the stuff in the text files.
The easiest examples to demonstrate this that I can think of are the Povray Short Code Contest Where 256-byte(!!!) programs make incredible 3D scenes including realistic landscapes, pottery collections, urban landscapes, jungles, red-blood-cell closeups, etc.
With a few more than 256 bytes of source code, you can do wonders. It's an amazing language.
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Povray examples in 256 characters
You can make complex scenes with Povray in 256 characters or less
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My results...
I succeded in transfering the filesystem to the USB drive from windows but my comp seems to be unwilling to boot from the USB device. Try what I did and maybe your comp will react better.
This is what I did...
1 Get the dd utility from here. Unzip it and put it into your c:\winnt directory (unless you want to mess with env. variables [PATH]).
2. Get the boot.img.gz image from here. For some unexplainable reason Windows unpacked it for me to its real size (ca 123 Mb). Maybe because I have winrar installed? Maybe not. Winrar should be able to unpack it anyway.
3. Get the bootbf2_4-xfs_iso.zip and read this to be able to unpack it. I like this ISO because it the kernel has XFS support. Choose any other you prefer.
4. Start a cmd.exe and use "dd --list" to see your devices so that dd can use them. (dd is used to copy raw data). My usb device was I: and in the listin I could read:
\\.\Volume{45e7b0b0-e981-11d8-be69-00a0c9ca4794}\
Mounted on i:\
5. After finding your USB device in the list dd the boot.img to the device:
dd boot.img.gz \\.\Volume{45e7b0b0-e981-11d8-be69-00a0c9ca4794}\
6. If that worked copy the unpacked bootbf2.4-xfs.iso file to your USBs root directory.
7. Reboot the comp and enter the BIOS setup. Set it to boot from your USB (or USB-ZIP) device.
The filesystem on my friends USB drive is fine and I can mount it from windows and Linux. The filesystem si 128Mb big and the device is 256 so it seemd to have worked fine (since the iso was supposed to have a 128Mb fs). I have one comp that is supposed to be bootable from USB but the USB device (mp3-player) itself seems to not react untill the OS is up. maybe that's why it won't boot? I hope. Hope you have better luck!.. :)
Cheers... -
Re:Interesting.. :)