Tuesday, January 17, 2012

8 Ways to use QR codes

What is QR code?
The QR Code stand for Quick Response Code, which is a two dimensional code. Lately QR code is becoming so popular among smart phone users and online marketing groups as it allows you to decode messages, URLs, location information at high speed without any typing.
Why QR code is better than Bar Codes?
  • QR codes can store large number of characters comparing to classic bar codes.
  • Square shape QR Codes dose not waste space and amount of characters dose not affect the size of the QR code.
  • QR code can handle errors in any case bar code is damages or covered.
  • Easy to decode the message.
  • (I think) QR codes looks more stylish and fancy comparing to the boring bar codes.
  • It is possible to add
What is the use of QR code? Usage of QR code?
Some of you might be excited about QR codes, Specially the marketing people.However, it is quite important to know the possibilities. How we can use QR codes to optimised our tasks. Specially it can save you time and effort typing information using a keyboard.
1. Used in Business Cards
Embed QR code into a business card with all your contact details will make it easy to add your contact information into a smart phone contact book. Simply scan the QR code and it will display the information embedded to the image.
2. Used in Email Signature
Why cant you add a QR code to your email signature where recipients can easily book mark your website from their smart phone or save your contact details.
3. Used in Twitter Backgrounds
Normally if you are adding a twitter background image you would like to add your logo, website URL or any other information. Simply add a QR code that can direct users to your website.
4. Send Phone numbers, Addresses, Locations or URL via email
When you are sending Address phone number or Location (Google Maps) via email do not forget to add it as QR code. Recipient can easily save it to their smart phone with a QR code reading app.
5. Used in online and offline catalogues.
If you have a printed product or service catalogue do not forget to add a QR code to direct people to buy now page url, information page url. If it is a online catalogue you can give QR code that can be used to book mark the URL.
6. Used in Profile Pictures (Facebook, Facebook fan page, Google+ Page)
You always want to have a fancy and professional looking profile picture for your social network account. Simply adding a QR code embedded with your website can give a extra advantage.
7. Website Contact Us Page or in Header or Footer
8. QR code can be used in Youtube videos.  
9. QR codes in Products

Increase your Net speed manually no need of Any software !!!

First, u need to goto
Start, then run.
Type in regedit in the box.
Next, goto the
folder HKEY_LOCAL_MACHINE\System\CurrentControlSet\services\VxD\MSTCP
Now, find the string Default Rcv Window.
Now, edit the number to 64240 (was 65535).
Reboot your Computer and now you have Increase your Net Speed

Towards Transparent CPU Scheduling

Of BFS related interest is an excellent thesis by Joseph T. Meehean
entitled "Towards Transparent CPU Scheduling". Of particular note is
the virtually deterministic nature of BFS, especially in fairness and
latency. While this of course interests me greatly because of
extensive testing of the BFS CPU scheduler, there are many aspects of
both the current CFS CPU scheduler and the older O(1) CPU scheduler
that are discussed that anyone working on issues to do with
predictability, scalability, fairness and latency should read.



In this thesis we propose using the scientific method to develop a deeper understanding of CPU schedulers; we use this approach to explain and understand the sometimes erratic behavior of CPU schedulers. This approach begins with introducing controlled workloads into commodity operating systems and observing the CPU scheduler's behavior. From these observations we are able to infer the underlying CPU scheduling policy and create models that predict scheduling behavior.
We have made two advances in the area of applying scientific analysis to CPU schedulers. The first, CPU Futures, is a combination of predictive scheduling models embedded into the CPU scheduler and user-space controller that steers applications using feedback from these models. We have developed these predictive models for two different Linux schedulers (CFS and O(1)), based on two different scheduling paradigms (timesharing and proportional-share). Using three different case studies, we demonstrate that applications can use our predictive models to reduce interference from low-importance applications by over 70%, reduce web server starvation by an order of magnitude, and enforce scheduling policies that contradict the CPU scheduler's.
Harmony, our second contribution, is a framework and set of experiments for extracting multiprocessor scheduling policy from commodity operating systems. We used this tool to extract and analyze the policies of three Linux schedulers: O(1), CFS, and BFS. These schedulers often implement strikingly different policies. At the high level, the O(1) scheduler carefully selects processes for migration and strongly values processor affinity. In contrast, CFS continuously searches for a better balance and, as a result, selects processes for migration at random. BFS strongly values fairness and often disregards processor affinity.