Here is an interesting offer by a company wanting to create "social routers." The idea is that people buy inexpensive wireless routers with the intention of sharing their connection with other people doing the same thing. A school district is a natural form of community. If a significant percentage of a community were to belong to a service such as FON, the result could be a community-wide wireless network. That could open the door to a wide range of possible projects.
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Wi-Fi Crusader in $5 Router Giveaway: "FON, a Spanish start-up on an ambitious crusade to turn home Wi-Fi connections into wireless 'hotspots' for nearby users, is set to unveil a plan to hand out 1 million wireless routers for just five dollars apiece."
The blog supporting the book: Technology on a Shoestring: A Survival Guide for Educators and Other Professionals
Friday, June 30, 2006
Thursday, June 29, 2006
FreeMind - free mind mapping software
Many classes require the students to do concept mapping or some other form of structured thinking. Linked below is a free program that does "mind mapping." It may not be as easy as some of the expensive programs, but it does appear to be usable by high school or junior high school students.
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Main Page - FreeMind - free mind mapping software
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Main Page - FreeMind - free mind mapping software
Wednesday, June 28, 2006
Inkscape: Open Source Vector Graphics
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Inkscape. Draw Freely: "Inkscape is a Vector Graphics Editor, similar to Adobe Illustrator, that strives to be SVG Compliant, open source, responsive and extensible."
Tuesday, June 27, 2006
Video Library of Open Source Operating Systems
Highly recommend!
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Video Library: "Examples of operating systems"
Anti-spam trick: Grey listing
If you run your own email server, there is no avoiding spam. Spam comprises between 75 and 99 percent of all email coming into an email server. On my server I was getting around 7k spam messages a day. I will be posting a few tips for handling spam in the coming days, but below is a new method that I'm told is quite effective. It's called "grey listing." As the term implies, it is somewhere between black listing and white listing.
Grey listing works based on the fact that most spammers are so busy spewing vast numbers of email messages that they will go around any address that does not respond quickly. So, based on that knowledge, the email server's grey listing program tells every new sender that the account to which they are sending is busy and to try again later. This error message is a legitimate email server message. A legitimate email server will try again within an hour. The grey listing system will accept the email message on the second try and will put the sender into the approved list so that no further delays will take place. Spammers will usually not try again. Of course, as this new trick is employed more widely, we have to assume that spammers will adjust.
Give it a try and let me know how it worked for you.
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Everything Sysadmin: Anti-spam trick: Grey listing
Grey listing works based on the fact that most spammers are so busy spewing vast numbers of email messages that they will go around any address that does not respond quickly. So, based on that knowledge, the email server's grey listing program tells every new sender that the account to which they are sending is busy and to try again later. This error message is a legitimate email server message. A legitimate email server will try again within an hour. The grey listing system will accept the email message on the second try and will put the sender into the approved list so that no further delays will take place. Spammers will usually not try again. Of course, as this new trick is employed more widely, we have to assume that spammers will adjust.
Give it a try and let me know how it worked for you.
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Everything Sysadmin: Anti-spam trick: Grey listing
Friday, June 23, 2006
Getting around email limitations
What Pando does is to create something like an automated FTP system. The user sends and email attachment that links to a Pando server with the large file. Email limits are never in question because the large file is never attached to the email. The difficulty of FTP is removed by the Pando system. If large file attachments are an issue for you, take a look at this system. It's currently free of charge.
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Welcome to Pando | Thanks for Sharing: "An effective way to get around email limitations."
Thursday, June 22, 2006
New Version of Xandros Linux
Xandros has just come out with a new version and anyone who has interest in Linux for the desktop should take a look. The link below is to their educational versions.
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Education Linux Products - Xandros: "Xandros Desktop is a Linux distribution that provides an easy to use operating system environment that is highly compatible with Microsoft Windows."
Wednesday, June 21, 2006
Landmarks for School
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Landmarks for School -- Home: "What to do with your Internet connection..."
Monday, June 19, 2006
Firewall Upgrading: Turn a mouse into a lion
No only are the features better, but you can even turn up the signal strength. Below is a link to the site that explains the features and provides a list of all the models that can be upgraded -- you may have one already.
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What is "DD-WRT"? - WRT Wiki: "Free Firewall upgrade"
Friday, June 16, 2006
Computer Science Teachers Association - ACM K-12 CS Model Curriculum
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Computer Science Teachers Association - ACM K-12 CS Model Curriculum
"The model curriculum from the ACM K-12 Task Force provides a framework for state departments of education and school districts to address the educational needs of young people and prepare them for personal and professional opportunities in the 21st century."
Thursday, June 15, 2006
EDUCAUSE 2006 Annual Conference
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EDUCAUSE 2006 Annual Conference | EDUCAUSE 2006: "Dallas"
Tuesday, June 13, 2006
TrueCrypt - Free Open-Source On-The-Fly Disk Encryption Software for Windows XP/2000 and Linux
Using disk encryption is a great way to make sure that sensitive computer data will not be readable to anyone else. Truecrypt is one of those open source programs that does a good job of making an inherently complex job simple for the user. It also has many features, including the ability to take the program with you on a flash device. This allows you to carry your data on a secured flash device and to run the program that makes it work.
Many of the new privacy laws, such as those in California, state that one must report any loss of data to the people whose data might have been compromised. But, if the database was encrypted, this embarrassing notice does not have to take place. Given that Truecrypt is a free program, there aren't any good reasons not to use it for sensitive data.
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TrueCrypt - Free Open-Source On-The-Fly Disk Encryption Software for Windows XP/2000 and Linux: "TrueCrypt is free open-source disk encryption software for Windows and Linux. Categories: data encryption, security software, privacy."
Library asset tracking
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TAGSYS RFID: leader in RFID asset tracking: "TAGSYS provides end to end RFID systems to track items. TAGSYS RFID automates manual processes, authenticates goods and enables real-time inventory."
Monday, June 12, 2006
CivicSpace: A community organizing platform
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CivicSpace: A community organizing platform | CivicSpace
Friday, June 09, 2006
Podcasting with the iPod
The podcast metaphor is a great one for a school because the school only needs to have enough content to meet demand. The content is there when the user is ready to listen. No need to schedule air time or explain that last week's basketball game is done and over with. Range is only limited by access to the Internet.
One the most important aspects for recording a podcast is the recording system. Traditionally, iPod players have not been very good for recording. With the addition of an accessory, such as the one here, the iPod now becomes an effective recorder. Because the audio file is already in digital format, there is not digitization of audio tape. A big time savings. Given that iPods are easy to find, the school may need only to purchase an accessory -- thus saving the school the expense of buying a recording device of its own.
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XtremeMac iPod Audio Accessories: MicroMemo for iPod with video
Thursday, June 08, 2006
What you see is not what others may get
I was doing some research on links in Google when I came across a web site with the normal vile content, but with a URL that was similar to what I was looking for. I knew what the web site was and I knew that it was not vile in any way. I clicked on the link and it indeed went to a bad place, but the link was redirected to another domain.
Here's where it got interesting. I typed in the same URL into the browser bar and the page did not work. At first, I thought someone must have figured out a way to spam Google, but I did a bit more research and found that a hacker had installed a small script on the hacked computer that tested for people coming from Google. If the incoming link was from Google, they would send to bad domain. But anyone going directly to the site would not see anything out of the order. The only way the site owner would know that their site was hacked was to look for uses of their URL on the search engine. And, of course, the traffic volume report must have gone through the roof.
The lesson here is that there are many reasons why hackers break into a system. Don't expect an obvious "you've been hacked!" message on your home page. Check your listing from time to time and look for unusual traffic patterns. And always keep your software updated and protected by strong passwords.
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Here's where it got interesting. I typed in the same URL into the browser bar and the page did not work. At first, I thought someone must have figured out a way to spam Google, but I did a bit more research and found that a hacker had installed a small script on the hacked computer that tested for people coming from Google. If the incoming link was from Google, they would send to bad domain. But anyone going directly to the site would not see anything out of the order. The only way the site owner would know that their site was hacked was to look for uses of their URL on the search engine. And, of course, the traffic volume report must have gone through the roof.
The lesson here is that there are many reasons why hackers break into a system. Don't expect an obvious "you've been hacked!" message on your home page. Check your listing from time to time and look for unusual traffic patterns. And always keep your software updated and protected by strong passwords.
T
Wednesday, June 07, 2006
AMD PIC: The other low-budget school computer
Another important difference between the two computers is that AMD's computer is sold or leased through the ISP. I gather that one cannot buy this unit.
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AMD PIC
Tuesday, June 06, 2006
Computers For ‘Next Billion People’
Will this computer be it? Difficult to know, but I think we are going in the right direction. I predict that it will be the lowering flash memory prices that will allow for the creation of a low-cost solid state computer. Such a computer will be more rugged, better on battery life, and near instantaneous in its start-ups and shut-downs.
This unit is from Intel. AMD has its own design.
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Intel CEO: Need To Speed Gains For ÑNext Billion PeopleÒ
Monday, June 05, 2006
Top 10 Reasons Why Online Backup is Replacing Tape,
Here is a follow-up posting to the on-line storage idea. If you liked the idea and need some justification points, this article may be very helpful. This is a vendor white paper, but that does not mean it does not contain valid information -- you just don't get the counterpoints.
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Top 10 Reasons Why Online Backup is Replacing Tape, from LiveVault - White Papers, Webcasts and Case: "Your most important asset - your corporate data - is far too valuable to entrust to cumbersome tape processes, unreliable backup media, and painstakingly slow recoveries. Small and medium-sized businesses (SMBs) are rapidly turning to online backup and recovery to displace older, manual, less reliable tape backup. In fact, a staggering 76.5% of IT professionals plan to change the way they do backup over the next 18 months. "
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Top 10 Reasons Why Online Backup is Replacing Tape, from LiveVault - White Papers, Webcasts and Case: "Your most important asset - your corporate data - is far too valuable to entrust to cumbersome tape processes, unreliable backup media, and painstakingly slow recoveries. Small and medium-sized businesses (SMBs) are rapidly turning to online backup and recovery to displace older, manual, less reliable tape backup. In fact, a staggering 76.5% of IT professionals plan to change the way they do backup over the next 18 months. "
Friday, June 02, 2006
Off-site Storage
There are many good reasons to use Internet-based file storage. Perhaps you want a off-site storage location that would survive a disaster or you want to share files with people outside the school. It allows you to access a file that would otherwise be locked in the school's file server until the next time you come to work.
Internet storage has been around for years, but the prices are going down and many schools and home users have the high-speed Internet connections required to make the experience bearable. This particular system, Elephant Drive, is currently in beta and thus free to try. They don't say what their price structure will be, but it is certainly worth testing it out.
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ElephantDrive Beta: "elephant drive, secure and universally accessible online data backup and storage"
Thursday, June 01, 2006
LyX - Document Processor
LyX is a must see for anyone creating documents with formulas or scientific notations. There is no longer the need to type a document and then hand write the equations.
It is also an interesting option as general word processor. First of all, it's free. It can run on multiple operating systems, including Linux. It's fast and can handle large and complex documents. That may not be an issue with newer computers, but some older computers may choke on documents with over a few hundred pages. While that may sound like more pages than anyone would every require, there are a surprising number of times that documents need to be created that include dozens or hundreds of other documents. Before you know it, you have a 700 page document that spends all its -- read: your -- time repaginating.
One last point of interest: LyX can handle many foreign languages -- including Arabic, Hebrew, and Chinese. This can make it useful for a language class.
While I would normally recommend Open Office or the related Star Office for any school looking to save money on a word processor, LyX should be considered for slower hardware and for situations where equations and/or complex documents will be created. One downside to remember: LyX is a word processor and not part of an integrated suite of applications.
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LyX - The Document Processor: "About the modern Document Processor LyX - a modern approach to word processing and typesetting."
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