Difference between Domain , Sub-Domain & Sub-Directory

Domain
Definition: “The first-level set of domain names are the top-level domains (TLDs), including the generic top-level domains (gTLDs), such as the prominent domains com, net and org, and the country code top-level domains (ccTLDs). Below these top-level domains in the DNS hierarchy are the second-level and third-level domain names that are typically open for reservation by end-users that wish to connect local area networks to the Internet, run web sites, or create other publicly accessible Internet resources.”

Example: http://how-to-blog.tv or http://www.orangecaster.com (note: the subdomain shows up between the http:// and the domain name in the second example.)

Page Rank: Though Google tracks page rank at the actual “web page level” a domain can be considered the equivalent of your social security number on the web as all pages and page rank are generally associated with a domain.

Subdomain
Definition: “The Domain Name System (DNS) has a tree structure or hierarchy, with each node on the tree being a domain name. A subdomain is a domain that is part of a larger domain, the only domain that isn’t also a subdomain is the root domain. For example, “mail.example.com” and “calendar.example.com” are subdomains of the “example.com” domain, which in turn is a subdomain of the “com” top-level domain (TLD)".
Example: hhttp://blog.macsales.com/

 Page Rank: Since each subdomain is treated as a different domain, subdomains will not share page rank with the website. However you can link between the website and subdomain and leverage your page rank this way. It does take time for the “link juice” to pass.

Search Engine Results: Again each subdomain is considered its own website so your search engine results could include one to two results for each subdomain right? Wrong, Google now treats subdomains the same as folders for their search results.

Subdirectory
Definition: Folder, directory, catalog, or drawer, in computing, is a virtual container within a digital file system, in which groups of computer files and other folders can be kept and organized. (source: Wikipedia)
Example: http://www.orangecaster.com/social-media (our general marketing blog at Orangecast is installed in a subdirectory)

Page Rank: Since the subdirectory shares the same domain name, the page rank is distributed to it from the rest of the website.

Search Engine Results: Matt Cutts explains what Google calls host crowding in this post on subdomains and subdirectories. The basic idea is that in most cases Google will only show two results from one hostname. Since the subdirectory will sit at the end of the hostname it will compete with the rest of your website to be one of the two results.

Zero-energy-consumption magneto-optical storage for next-generation flexible plastic computers

Researchers at the University of Iowa have discovered a method of converting magnetic data into optical data for free, without external electricity. This is a very big step towards flexible, cheap, throwaway plastic computers, which are gaining in popularity due to society’s recent shift towards mobile computing and “quantified self” activity monitors.

Plastic computers are fundamentally very similar to normal, metal computers — but instead of being fabricated out of wafers of silicon, plastic computers consist of organic semiconductors (polymers) that are laid down on a flexible, plastic substrate, creating organic field-effect transistors (OFETs). These OFETs don’t have the same performance characteristics as silicon, but they’re good enough for ultra-low-power mobile and wearable computing. (These are the same kind of organic semiconductors used in OLED displays, incidentally.)

Flexible, organic NAND flash — a few bytes of it, anyway

While we mostly have the logic and computation side of plastic computers worked out, there are still big question marks hanging over the storage and power consumption parts of the equation. OFETs aren’t all that efficient, and current transistor densities are much too low to build usable amounts of RAM or non-volatile NAND flash on a plastic substrate. It is theoretically possible to use a thin magnetic foil that stores high-density data, much like a hard drive platter, but reading that magnetic data with organic semiconductors is hard and consumes a lot of power. Until now!

The University of Iowa researchers have found a way of transducing (converting) magnetic data, stored on a magnetic foil, into optical data emitted by an organic LED. Normally this would require a large amount of electricity, but using a magnetoelectroluminescent compound in the OLED the researchers found that the transduction could be done for free. The science is complex, but from what I can gather the magnetic field of the bits stored on the foil are enough to excite the OLED into producing photons. In theory, you could then transport this optical data around the plastic computer using some kind of communication bus. (Plastics, while not a great substrate for building high-performance computers, are very good at carrying optical data. Most consumer-grade optical fiber, for networking and audio, is plastic.)

. There could also be some implications for high-capacity storage devices that use high-speed optical buses. For consumers, the main takeaway here is that we’re taking another big step towards cheap, flexible computers with decent storage capacity — and given our new interest in curved devices, activity monitors, and sticking sensors on everything, the University of Iowa discovery could be very significant indeed.

How to know Admin Password through Guest User

Hello guys, Today will provide you 2 awesome and easy trick through which you can hack admin account through guest account.

If you been using someones Pc in guest account and want to have Admin privilage then worry not,there is a trick for you to Gain Admin Privilage .
lets get started with it.

Method 1.

1) Go to C:/windows/system32.
2) Copy cmd.exe and paste it on desktop.
3) Rename cmd.exe to sethc.exe.

4) Copy the new sethc.exe to system 32,when windows asks for overwriting the file,then click yes.
5) Now Log out from your guest account and at the user select window,press shift key 5 times.
6) Instead of Sticky Key confirmation dialog,command prompt with full administrator privileges will open.
7) Now type “ NET USER ADMINISTRATOR “zzz” where “zzz” can be any password you like and press enter.
8) You will see “ The Command completed successfully” and then exit the command prompt and login into administrator with your new password.
9) Bravo !! Now You have hacked admin through guest account.

Method 2

This is another method you can use to hack admin password without knowing it.
It is possible to change Adminstrator password both in Win XP and Vista without knowing it. If you some how manage to login as an Administrator then you can change the password without knowing it.

Here’s the Step-By-Step instructions. 

1. Right-click on the “My Computer” icon on the desktop OR in the Start Menu.

2. Select the option “Manage”.

3. On the left pane expand the “Computer Management (Local) tree (if it is not already expanded)

4. Double click “Local Users and Groups” option From “System Tools” tree.

5. Click the “Users” option.

6. Now you will see the list of users on the right side pane, such as Administrator, Guest etc.

7. Right click the “Administrator” and select the option “Set Password” option.

8. Now you will see a warning message, Click on proceed.

9. Now the system asks you for “New Password” and “Confirm Password” .

10. After entering the password click on “OK”. The password is changed. That’s It!..

you have now successfully changed admin password without knowing it.

Read more: http://geekofreak.com/2013/01/hack-admin-password-through-guest.html#ixzz3BRexXMAk