Computing desk | ||
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< October 30 | << Sep | October | Nov >> | November 1 > |
Welcome to the Wikipedia Computing Reference Desk Archives |
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Hello. I wanted to detect the speed (velocity) of how fast I'm traveling (like it a car, etc) via a computer. I need something with a fast update rate (5Hz or more) and it needs to connect to a serial port. I know some high-end GPS recievers can do this, but are there other alternatives? I was wondering if you could buy inertia sensors or something that would work as well? I couldn't find any information on anything but GPS recievers. I don't care about software support, I can do that myself. Any ideas? Thanks -- 71.171.2.96 00:40, 31 October 2006 (UTC)
Are you looking to just log the data or do you need use or process the data in real time? Adaptron 11:12, 31 October 2006 (UTC)
Over the past few days I've been looking for an algorithm to decode a wave files. All I needed was a few lines of code. Most of the sites I went to had a lot of details but none with all of the requirements or the straight forward code. I was, however, finally able to put some code together and now after several days of doing nothing else have exactly what I wanted. so it occurs to me that if there was a place in this wiki where specific algorithms could be kept that not only would they be available for immediate use but would be straight forward and to the point. (I should probably start by posting the algorithm and code I created right here until a better palce can be found but since this stiff gets archive quite often eventually the code would probably get lost. Any suggestions? BTW... I was fooling around with my bar code scanner and looking at my new LCD screen on my other computer when it occured to me how neat it would be if my scanner could read bar codes right off the screen. I went looking for sites with bar code examples and guess what? It works! Must be a trillion applications that could use bar codes from a screen. Have no idea what any of them are. Maybe you can help. Adaptron 12:00, 31 October 2006 (UTC)
While Wikipedia isn't the right place for this, another wiki might very well be. Just a few days ago somebody wanted to post an algorithm to predict sunrise and sunset based on location and date. I suggested we may want to create a WikiCode wiki for the purpose of sharing code. What does everyone think ? StuRat 02:31, 1 November 2006 (UTC)
I'd like to know what's the most popular wiki engine running on Windows/IIS platform in terms of installation base? Mahanchian 12:28, 31 October 2006 (UTC)
If I have five HDs and load linux onto one of them, and run my Linux, where will I find the files? Since I'm used to my media being mounted at the root in Windows (I think I'm using the terminology correctly), I keep all the music on one drive, all my movies on another, all the work on another etc. I am currently unable to fathom where Linux will deem suitable to locate my files.
Furthermore, forgetting this particular situation, suppose I have my home/ directory and I put a few files in it, would these files be shared across different drives, even though they are in the same folder? Do I have any control over where Linux put my files? -- Username132 ( talk) 13:39, 31 October 2006 (UTC)
/dev/hda1
, /dev/hdb1
, etc. (Sometimes the letter s replaces h.) (If they are in fact partitions on one drive rather than really separate drives, they will probably be called /dev/hda1
, /dev/hda2
, etc..) But this isn't where the files are, it's where the representation of the disk itself is; to put the files somewhere, you (as
root) use mount DEVICE DIRECTORY
, where DEVICE is one of the names I've already listed and DIRECTORY is an existing, typically empty directory. Commonly such directories are put into
/mnt
; you could do something likemkdir /mnt/music mkdir /mnt/movies mkdir /mnt/work # Typically /dev/hda1 is already / mount /dev/hdb1 /mnt/music mount /dev/hdc1 /mnt/movies mount /dev/hdd1 /mnt/work
/mnt
. The mkdir
s are permanent, but the mount
s evaporate when the system shuts down; you can arrange for them to automatically happen at every boot with /etc/
fstab
. You may be able to get a hint as to what device names to use by typing just mount
. Does that help? --
Tardis 16:28, 31 October 2006 (UTC)/mnt/music/foo/bar/baz
would actually be the file with "physical name" F:/foo/bar/baz
. You could then, if you wanted, mount something at "/mnt/music/no/not/really/I/meant/video/instead/" -> "J:" and then accesses beginning with that path would go yet a third place even though they quite clearly begin with "/mnt/music/". The only "spreading" that occurs is that the "parent" filesystem (the one that owns the path in a mapping, like the music drive for the video mount I mentioned) must actually have a directory at the point where you add the other filesystem; its contents are irrelevant, since they will be invisible after the mount. Is that clearer? --
Tardis 21:31, 31 October 2006 (UTC)/f/Firestarter.mp3
and /g/Lost.mov
. Most people just find (especially with
tab completion and the ability to make
symlinks) that using the more-explicit style of prefix (like "/mnt/music/") is more convenient. --
Tardis 15:52, 1 November 2006 (UTC)It's much cleaner just to use a RAID controller and have the filesystem treat it as one gigantic drive -- froth T C 18:20, 31 October 2006 (UTC)
Dell computer, browsing with IE. For the last week about a third of the time whenever I click a link, be it at Wikipedia or elsewhere, instead of linking I get a "download file" dialogue box. I have restarted twice, run norton without it finding any virus, have three separate anti-spyware programs running, and I defragmented a few days ago. I have made no voluntary modifications to any of my computer's settings. Anyone have any ideas? Maybe a malicious script or something changed a setting on my computer that I can change back? Would me best bet be to reinstall internet explorer? It's an extremely annoying bug-- Fuhghettaboutit 14:43, 31 October 2006 (UTC)
I have a thought, perhaps IE is set for "automatic upgrades" but your security settings are such that you are prompted whenever a download of an update is attempted. When a download fails (because you refuse it), it may just wait for some time period and/or some number of interactions, then try again. It could also be software for your ISP or an anti-virus program, or some other software, which is attempting automatic updates. As a test, I suggest you "turn everything off". That is, stop Norton and all the other extraneous software, and use the Task Manager to make sure everything you can shut down is really shut down all the way. Then pick some links in Wikipedia, which hopefully won't try to load a virus onto your system, and see if this behavior changes. If this cures it, then you need to track down which one of the stopped programs was the culprit. If this doesn't cure it, then shut down IE and try another browser, like Firefox or Netscape. StuRat 02:04, 1 November 2006 (UTC)
I just installed SUSE 10.1 Linux, which I am dual booting with win xp. I have a total of four physical hard drives on my system. Two are IDE and two are SATA. BIOS recognizes all of them. Windows recognizes all, except for one SATA drive because it is one big partition over 300gb. However, the really strange thing is that SUSE recognizes both SATA drives, but not either of my IDEs. This keeps me from using linux with any regularity, because at the moment most of my personal data is on the IDEs. I'm excellent with windows, but a linux noobie. Any advice would be greatly appreciated.
I'm lost, are you saying try finding the linux drivers for my PATA drives? Anybody else?? The more insight the better. Thanks a lot guys.
Gotcha, yeah I forgot that technically they're both IDE, while one is parallel and the other serial. I'll give it a shot. Thanks!
Okay heres my problem: Im trying to make my computer into a sort of media center. I already have a new video card which can output S-Video to my telelvision. I wish to purchase a DVD player for the computer so that i can put the dvd in it and play it back through to the TV and still maybe be able to do things on my monitor. The problem is, my TV has a built in VCR. I know that plugging a regular DVD player to it makes the picture mess up and get lighter and darker, like macrovision maybe? so will i be able to see the image when i use my computer? my thought is because it is the graphics card which is outputting the signal, it might go through. I have no intention of copying my purchased DVDs to a VHS tape, thats just silly. i only want to know if i will be able to view it on my television. Anyone know the answer to my question? thanks for the help! :)
Mike [[[User:172.162.48.59|172.162.48.59]] 19:22, 31 October 2006 (UTC)]
What a pain. all i want is to WATCH the DVD material. not really a crime! ;) -Mike
Get a nice digital TV with VGA inputs -- froth T C 02:59, 1 November 2006 (UTC)
Hello all, I'd really be grateful if some one helped me with this.I have an assignment and I'm required to do a program similar to the linux shell using c++ and under windows.This program shall be able to execute some system calls like cd, mkdir, mv, ls, kill, ps, etc. and we shouldn't use the exec function. So can some body plz tell me what r the API functions that i can use to execute these commands?? coz i'm really clueless ! Thanks in advance.
Yasmeen
yes, my program should read the user input and execute that command
I'm creating a website. I know very little PHP or mySQL, so many of the websites features (e.g. forums, blogs) were created using a variety of CMSs. Now I'd like to add the capability for users to be able to upload files, (in this case open-source code libraries) and categorize and tag them. Preferably, they would also be able to submit new versions of the file (like the latest version of a library).
Anyone know of any software that would allow me to add this feature to my site?
Thanks! --- Michael
Yep, Joomla is a very good and easy to use CMS. It has many features, is open-source and requires no real programming (unless you decide to do more advanced things). You can grab it from: http://www.joomla.org/. It is good because you can 'install' extensions easily which are like programs to run on the website, like user blogs, photo galleries, games, forums, with a centralised user database. Ronaldh 13:37, 3 November 2006 (UTC)
I was looking at Skype, but couldn't find an answere. Is skype (the sowtware at least) free to download and use? MHDIV Englishnerd 20:14, 31 October 2006 (UTC)
We are a small nonprofit organization with a plan to create a large digital archive - text, audio, video material - that will be used in house and eventually offered to the web. The hard drive array is being installed soon by a generous donor - I've been told: SATA in a SAS (Serial Attached SCSI) Infrastructure. We need to select a server operating system. The choice offered is: Microsoft Windows Server 2003 R2 Datacenter Edition or Novell SuSE Linux Enterprise Server Application Platform. We have some Linux expertise, but are mostly familiar with Windows. Is it a fair distinction to say: less security with Windows, increased administrator complexity with Linux? We will have to learn to do everything, how to educate ourselves to make the decision that will work for us now and in the long term. Many thanks, Tom
Computing desk | ||
---|---|---|
< October 30 | << Sep | October | Nov >> | November 1 > |
Welcome to the Wikipedia Computing Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Hello. I wanted to detect the speed (velocity) of how fast I'm traveling (like it a car, etc) via a computer. I need something with a fast update rate (5Hz or more) and it needs to connect to a serial port. I know some high-end GPS recievers can do this, but are there other alternatives? I was wondering if you could buy inertia sensors or something that would work as well? I couldn't find any information on anything but GPS recievers. I don't care about software support, I can do that myself. Any ideas? Thanks -- 71.171.2.96 00:40, 31 October 2006 (UTC)
Are you looking to just log the data or do you need use or process the data in real time? Adaptron 11:12, 31 October 2006 (UTC)
Over the past few days I've been looking for an algorithm to decode a wave files. All I needed was a few lines of code. Most of the sites I went to had a lot of details but none with all of the requirements or the straight forward code. I was, however, finally able to put some code together and now after several days of doing nothing else have exactly what I wanted. so it occurs to me that if there was a place in this wiki where specific algorithms could be kept that not only would they be available for immediate use but would be straight forward and to the point. (I should probably start by posting the algorithm and code I created right here until a better palce can be found but since this stiff gets archive quite often eventually the code would probably get lost. Any suggestions? BTW... I was fooling around with my bar code scanner and looking at my new LCD screen on my other computer when it occured to me how neat it would be if my scanner could read bar codes right off the screen. I went looking for sites with bar code examples and guess what? It works! Must be a trillion applications that could use bar codes from a screen. Have no idea what any of them are. Maybe you can help. Adaptron 12:00, 31 October 2006 (UTC)
While Wikipedia isn't the right place for this, another wiki might very well be. Just a few days ago somebody wanted to post an algorithm to predict sunrise and sunset based on location and date. I suggested we may want to create a WikiCode wiki for the purpose of sharing code. What does everyone think ? StuRat 02:31, 1 November 2006 (UTC)
I'd like to know what's the most popular wiki engine running on Windows/IIS platform in terms of installation base? Mahanchian 12:28, 31 October 2006 (UTC)
If I have five HDs and load linux onto one of them, and run my Linux, where will I find the files? Since I'm used to my media being mounted at the root in Windows (I think I'm using the terminology correctly), I keep all the music on one drive, all my movies on another, all the work on another etc. I am currently unable to fathom where Linux will deem suitable to locate my files.
Furthermore, forgetting this particular situation, suppose I have my home/ directory and I put a few files in it, would these files be shared across different drives, even though they are in the same folder? Do I have any control over where Linux put my files? -- Username132 ( talk) 13:39, 31 October 2006 (UTC)
/dev/hda1
, /dev/hdb1
, etc. (Sometimes the letter s replaces h.) (If they are in fact partitions on one drive rather than really separate drives, they will probably be called /dev/hda1
, /dev/hda2
, etc..) But this isn't where the files are, it's where the representation of the disk itself is; to put the files somewhere, you (as
root) use mount DEVICE DIRECTORY
, where DEVICE is one of the names I've already listed and DIRECTORY is an existing, typically empty directory. Commonly such directories are put into
/mnt
; you could do something likemkdir /mnt/music mkdir /mnt/movies mkdir /mnt/work # Typically /dev/hda1 is already / mount /dev/hdb1 /mnt/music mount /dev/hdc1 /mnt/movies mount /dev/hdd1 /mnt/work
/mnt
. The mkdir
s are permanent, but the mount
s evaporate when the system shuts down; you can arrange for them to automatically happen at every boot with /etc/
fstab
. You may be able to get a hint as to what device names to use by typing just mount
. Does that help? --
Tardis 16:28, 31 October 2006 (UTC)/mnt/music/foo/bar/baz
would actually be the file with "physical name" F:/foo/bar/baz
. You could then, if you wanted, mount something at "/mnt/music/no/not/really/I/meant/video/instead/" -> "J:" and then accesses beginning with that path would go yet a third place even though they quite clearly begin with "/mnt/music/". The only "spreading" that occurs is that the "parent" filesystem (the one that owns the path in a mapping, like the music drive for the video mount I mentioned) must actually have a directory at the point where you add the other filesystem; its contents are irrelevant, since they will be invisible after the mount. Is that clearer? --
Tardis 21:31, 31 October 2006 (UTC)/f/Firestarter.mp3
and /g/Lost.mov
. Most people just find (especially with
tab completion and the ability to make
symlinks) that using the more-explicit style of prefix (like "/mnt/music/") is more convenient. --
Tardis 15:52, 1 November 2006 (UTC)It's much cleaner just to use a RAID controller and have the filesystem treat it as one gigantic drive -- froth T C 18:20, 31 October 2006 (UTC)
Dell computer, browsing with IE. For the last week about a third of the time whenever I click a link, be it at Wikipedia or elsewhere, instead of linking I get a "download file" dialogue box. I have restarted twice, run norton without it finding any virus, have three separate anti-spyware programs running, and I defragmented a few days ago. I have made no voluntary modifications to any of my computer's settings. Anyone have any ideas? Maybe a malicious script or something changed a setting on my computer that I can change back? Would me best bet be to reinstall internet explorer? It's an extremely annoying bug-- Fuhghettaboutit 14:43, 31 October 2006 (UTC)
I have a thought, perhaps IE is set for "automatic upgrades" but your security settings are such that you are prompted whenever a download of an update is attempted. When a download fails (because you refuse it), it may just wait for some time period and/or some number of interactions, then try again. It could also be software for your ISP or an anti-virus program, or some other software, which is attempting automatic updates. As a test, I suggest you "turn everything off". That is, stop Norton and all the other extraneous software, and use the Task Manager to make sure everything you can shut down is really shut down all the way. Then pick some links in Wikipedia, which hopefully won't try to load a virus onto your system, and see if this behavior changes. If this cures it, then you need to track down which one of the stopped programs was the culprit. If this doesn't cure it, then shut down IE and try another browser, like Firefox or Netscape. StuRat 02:04, 1 November 2006 (UTC)
I just installed SUSE 10.1 Linux, which I am dual booting with win xp. I have a total of four physical hard drives on my system. Two are IDE and two are SATA. BIOS recognizes all of them. Windows recognizes all, except for one SATA drive because it is one big partition over 300gb. However, the really strange thing is that SUSE recognizes both SATA drives, but not either of my IDEs. This keeps me from using linux with any regularity, because at the moment most of my personal data is on the IDEs. I'm excellent with windows, but a linux noobie. Any advice would be greatly appreciated.
I'm lost, are you saying try finding the linux drivers for my PATA drives? Anybody else?? The more insight the better. Thanks a lot guys.
Gotcha, yeah I forgot that technically they're both IDE, while one is parallel and the other serial. I'll give it a shot. Thanks!
Okay heres my problem: Im trying to make my computer into a sort of media center. I already have a new video card which can output S-Video to my telelvision. I wish to purchase a DVD player for the computer so that i can put the dvd in it and play it back through to the TV and still maybe be able to do things on my monitor. The problem is, my TV has a built in VCR. I know that plugging a regular DVD player to it makes the picture mess up and get lighter and darker, like macrovision maybe? so will i be able to see the image when i use my computer? my thought is because it is the graphics card which is outputting the signal, it might go through. I have no intention of copying my purchased DVDs to a VHS tape, thats just silly. i only want to know if i will be able to view it on my television. Anyone know the answer to my question? thanks for the help! :)
Mike [[[User:172.162.48.59|172.162.48.59]] 19:22, 31 October 2006 (UTC)]
What a pain. all i want is to WATCH the DVD material. not really a crime! ;) -Mike
Get a nice digital TV with VGA inputs -- froth T C 02:59, 1 November 2006 (UTC)
Hello all, I'd really be grateful if some one helped me with this.I have an assignment and I'm required to do a program similar to the linux shell using c++ and under windows.This program shall be able to execute some system calls like cd, mkdir, mv, ls, kill, ps, etc. and we shouldn't use the exec function. So can some body plz tell me what r the API functions that i can use to execute these commands?? coz i'm really clueless ! Thanks in advance.
Yasmeen
yes, my program should read the user input and execute that command
I'm creating a website. I know very little PHP or mySQL, so many of the websites features (e.g. forums, blogs) were created using a variety of CMSs. Now I'd like to add the capability for users to be able to upload files, (in this case open-source code libraries) and categorize and tag them. Preferably, they would also be able to submit new versions of the file (like the latest version of a library).
Anyone know of any software that would allow me to add this feature to my site?
Thanks! --- Michael
Yep, Joomla is a very good and easy to use CMS. It has many features, is open-source and requires no real programming (unless you decide to do more advanced things). You can grab it from: http://www.joomla.org/. It is good because you can 'install' extensions easily which are like programs to run on the website, like user blogs, photo galleries, games, forums, with a centralised user database. Ronaldh 13:37, 3 November 2006 (UTC)
I was looking at Skype, but couldn't find an answere. Is skype (the sowtware at least) free to download and use? MHDIV Englishnerd 20:14, 31 October 2006 (UTC)
We are a small nonprofit organization with a plan to create a large digital archive - text, audio, video material - that will be used in house and eventually offered to the web. The hard drive array is being installed soon by a generous donor - I've been told: SATA in a SAS (Serial Attached SCSI) Infrastructure. We need to select a server operating system. The choice offered is: Microsoft Windows Server 2003 R2 Datacenter Edition or Novell SuSE Linux Enterprise Server Application Platform. We have some Linux expertise, but are mostly familiar with Windows. Is it a fair distinction to say: less security with Windows, increased administrator complexity with Linux? We will have to learn to do everything, how to educate ourselves to make the decision that will work for us now and in the long term. Many thanks, Tom