Linuxers August 2006

linuxers@mm.ilug-bom.org.in

108 participants
171 discussions

revovering an NTFS Partition
by francis pereira 31 Aug '06

31 Aug '06

Ahh Freeky , Prevously I had /dev/hda1 and /dev/hda2 both as NTFS File system . hda1 was Primary and I think hda2 was Primary file system too . I Formatted hda1 to ext3 and now hda2 which was untouched is showing all free space . Is there anyway i can recover hdb2 . Cheers, Francis

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Re: [ILUG-BOM] Directional Radio Signposts.
by Akshay Mishra 31 Aug '06

31 Aug '06

---------- Forwarded message ---------- From: Rony <ronbillypop(a)yahoo.co.uk> To: "GNU/Linux Users Group, Mumbai, India" <linuxers(a)mm.glug-bom.org> Date: Thu, 31 Aug 2006 20:04:10 +0530 Subject: Re: [ILUG-BOM] Directional Radio Signposts. hemendra jain wrote: >Nowadays wireless device frequencies are in GHz. so that should be ideal >to build a mini pocket size parabolic antenna for directional reception. >What type of assistance are you looking at? >Regards, >Rony. I have worked on 8051 + RF devices. Good support, good range and the normal whip antennas are fine. Problem with using GPS is (a) lack of detailed maps for India (b) cost An 8051 with RF chip should do the basic processing. Else put in a DSP for more computation and use the 8051 as the front end for communication. You are not looking at a fancy OS on it, right. these RF can be configured for directional transmission by placing a directional antenna at the transmitter end. Akshay

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Re: [ILUG-BOM] Directional Radio Signposts.
by hemendra jain 31 Aug '06

31 Aug '06

Dear Rony, >The main hurdle in this concept is to develop a proper radio system >that has directional accuracy without being too expensive for the >comman man. The idea is excellent. I have done various electronics projects(8051 based). Also, I have enough knowledge of Radio frequency. I need somebody's assistance to get started with the project. Rgds, Hemendra Jain Team Work leads to success. On Wed, 30 Aug 2006 Rony wrote : >Hello All, > >While we are on to discussing new ideas, this is a concept that I thought of during my daily traveling. I am mostly on field and travel a lot in public transport. I have observed that visually impaired persons usually have a problem with directions and it is more complex when it comes to making choices in different directions. Now that we have the honor of having an extremely talented person like Mr. Mane on our list, he too can give feedback on this. > >The normal method is to use beeping sounds near signals and crossings. However, our road networks are complex and require more complex sign aids. The problem is compounded when making a choice at a junction of many roads, not knowing which road leads to what place. > >This can be resolved by having radio beepers at all road points and each beeper having its own data repeatedly broadcast. To differentiate between each post and its data, the user has a handheld unidirectional radio receiver that has a mini parabolic dish antenna. The user first turns the receiver around and gets beeps for every radio post detected. As the device is pointed, its sound is the loudest when pointing straight to it. Then with the flick of a switch, he hears the data through a earphone. It tells him where he is located and where the direction he points to, is leading to with actual road names too. Its like a guide explaining different directions. So while the radio post is omni directional, the receiver is uni directional. > >Shops and restaurants too can use these radio posts to guide people to their shops and advertise their merchandise. I say, this system can be used even by sighted people who need help in directions, as big junctions have long distances across and looking across signboards can be difficult with buses and other traffic blocking the view. Tourists will find this a very handy live city guide. > >The main hurdle in this concept is to develop a proper radio system that has directional accuracy without being too expensive for the comman man. > >Regards, > >Rony. > > ___________________________________________________________ Try the all-new Yahoo! Mail. "The New Version is radically easier to use" The Wall Street Journal http://uk.docs.yahoo.com/nowyoucan.html > > >-- http://mm.glug-bom.org/mailman/listinfo/linuxers

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Directional Radio Signposts.
by Rony 30 Aug '06

30 Aug '06

Hello All, While we are on to discussing new ideas, this is a concept that I thought of during my daily traveling. I am mostly on field and travel a lot in public transport. I have observed that visually impaired persons usually have a problem with directions and it is more complex when it comes to making choices in different directions. Now that we have the honor of having an extremely talented person like Mr. Mane on our list, he too can give feedback on this. The normal method is to use beeping sounds near signals and crossings. However, our road networks are complex and require more complex sign aids. The problem is compounded when making a choice at a junction of many roads, not knowing which road leads to what place. This can be resolved by having radio beepers at all road points and each beeper having its own data repeatedly broadcast. To differentiate between each post and its data, the user has a handheld unidirectional radio receiver that has a mini parabolic dish antenna. The user first turns the receiver around and gets beeps for every radio post detected. As the device is pointed, its sound is the loudest when pointing straight to it. Then with the flick of a switch, he hears the data through a earphone. It tells him where he is located and where the direction he points to, is leading to with actual road names too. Its like a guide explaining different directions. So while the radio post is omni directional, the receiver is uni directional. Shops and restaurants too can use these radio posts to guide people to their shops and advertise their merchandise. I say, this system can be used even by sighted people who need help in directions, as big junctions have long distances across and looking across signboards can be difficult with buses and other traffic blocking the view. Tourists will find this a very handy live city guide. The main hurdle in this concept is to develop a proper radio system that has directional accuracy without being too expensive for the comman man. Regards, Rony. ___________________________________________________________ Try the all-new Yahoo! Mail. "The New Version is radically easier to use" The Wall Street Journal http://uk.docs.yahoo.com/nowyoucan.html

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Linux file recovery.
by Rony Bill 30 Aug '06

30 Aug '06

Hello All, I want to know some good utility for recovering a deleted ext3 partition's files and folders. The partition is not yet overwritten. I googled and tried `r-linux' in windows as well as `recover' in linux but both these softwares simply dump a long list of blank files that represent inodes. The tldp site too does not provide info about converting inodes into original files. How does one actually convert deleted files/folders into their original form? Regards, Rony. ___________________________________________________________ All New Yahoo! Mail Tired of Vi@gr@! come-ons? Let our SpamGuard protect you. http://uk.docs.yahoo.com/nowyoucan.html

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GDB Help
by Rajesh Warange 30 Aug '06

30 Aug '06

Hi, I 'm working on Debuggers, basically GDB ... need to change it for a native chipset. I need to know 1. the "chain of functions" GDB goes through when given the command on the Command-Line. 2. Also the "chain of commands" GDB goes through when given commands like break, step etc. I 'm reading GDB Internals ... but its not helping me much in this regard. Pleas Help. -- wrr

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Re:[ILUG-BOM] Directional Radio Signposts.
by deshpande＠vsnl.com 30 Aug '06

30 Aug '06

Hello ITS A FANTASTIC IDEA I REPEAT ITS A FANTASTIC IDEA Congratulations to Roney for thinking of such an idea MAHESH DESHPANDE

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Adding a Mirror to existing server
by Hozefa Motiwala 30 Aug '06

30 Aug '06

Hi All, I have a Qmail Server running in an Linux RH box since last 4 years. what I need to do is that to add a mirror to the existing hdd to make it redundant as the life of existing hdd may be over.(Although its working properly ) but I don't want to down the server as it is running online and is critical for my client. Any inputs would be greatly appreciated. Thanks Hozefa.

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[COMMERCIAL] Job opportunities in storage domain
by Nirendra Awasthi 30 Aug '06

30 Aug '06

A multinational storage company in Pune is looking for candidate with following experience: Mandatory skills: 1. 1+ year of Perl programming experience. 2. Knowledge of OS internals. 3. Sound knowledge of software development methodologies and engineering processes. 4. Comfortable in Unix/Linux development environment. 5. Passion to learn new technology. Desirable skills: 1. Experience in development using C/C++. 2. Knowledge of storage domain. Experience: 1-4 years Location: Pune If interested please contact me offlist on lists (at) nirendra.net -Nirendra

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Re: [ILUG-BOM] Directional Radio Signposts.
by Akshay Mishra 30 Aug '06

30 Aug '06

> > ---------- Forwarded message ---------- > > From: Rony <ronbillypop(a)yahoo.co.uk> > > To: "GNU/Linux Users Group, Mumbai, India" <linuxers(a)mm.glug-bom.org> > > Date: Wed, 30 Aug 2006 22:35:52 +0530 > > Subject: [ILUG-BOM] Directional Radio Signposts. > > Hello All, > > > > While we are on to discussing new ideas, this is a concept that I > > thought of during my daily traveling. I am mostly on field and travel a > > lot in public transport. I have observed that visually impaired persons > > usually have a problem with directions and it is more complex when it > > comes to making choices in different directions. Now that we have the > > honor of having an extremely talented person like Mr. Mane on our list, > > he too can give feedback on this. > > > > The normal method is to use beeping sounds near signals and crossings. > > However, our road networks are complex and require more complex sign > > aids. The problem is compounded when making a choice at a junction of > > many roads, not knowing which road leads to what place. > > > > This can be resolved by having radio beepers at all road points and each > > beeper having its own data repeatedly broadcast. To differentiate > > between each post and its data, the user has a handheld unidirectional > > radio receiver that has a mini parabolic dish antenna. The user first > > turns the receiver around and gets beeps for every radio post detected. > > As the device is pointed, its sound is the loudest when pointing > > straight to it. Then with the flick of a switch, he hears the data > > through a earphone. It tells him where he is located and where the > > direction he points to, is leading to with actual road names too. Its > > like a guide explaining different directions. So while the radio post is > > omni directional, the receiver is uni directional. > > > > Shops and restaurants too can use these radio posts to guide people to > > their shops and advertise their merchandise. I say, this system can be > > used even by sighted people who need help in directions, as big > > junctions have long distances across and looking across signboards can > > be difficult with buses and other traffic blocking the view. Tourists > > will find this a very handy live city guide. > > > > The main hurdle in this concept is to develop a proper radio system that > > has directional accuracy without being too expensive for the comman man. > > > > Regards, > > > > Rony. Ideally this should come with the cell phone. But what with Bluetooth being subjective to virus attacks, an addon can be designed which does this task. Also, with RF enabled microcontrollers available cheaply, one can do these developments as standalone devices. Another application is giving them out at places like Prince of Wales Musuem instead of the casette players. Each location identified with numbers can emit a low power rf. The player with the tourist shall know which id is this and hence what information to play out. The RF/processing cost is not major hurdle if the amout of processing required is small and the distances are within a few hundred metres, the data rates not exceeding a few kbps. (64kbps is supported by a few chips over short distances) regards, Akshay

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Linuxers August 2006