What Is V:
1. virtual memory management is the process of managing computer data storage space which appears to applications as if it were an infinite set of discrete, addressable memory cells.
2. If there are 2GB ram installed on windows, windows will only use the lowest 2GB for process files and page files (the part used by programs). The remaining 1gig will be wasted on windows unless you make changes to make windows use all four GB or at least three GB out of 4 GB.
This can be achieved using the Virtual Memory Manager (VMM) unit found in Windows Vista/7/8/8.1 (and Server versions, too, I guess). But by default, virtual memory manages only up to 3GB. And VMM Manager is not XP compatible.
So, by using some dll present at system32 directory of windows xp/7/8/vista, we can make Windows Vista and later versions use up to 4GB (or more) virtual memory and extend the total available memory for programs up to 3Gb (Like XP), or we can set it to go beyond that too. You might be thinking, what the hell.. why should I do all this. Just upgrade your pc if you have minimal ram. But what if you already have a 2GB computer… And want to utilize fully both installed RAMs… To use all the existing hardware resources instead of waiting for the next upgrade… That’s where Virtual Memory Manager comes into the picture.
3. By default, if your computer has 4GB of RAM installed, only 3GB will be used for virtual memory. This means that 1GB is wasted. If you want to use all of your RAM, you will need to change some settings in Windows. You can do this using the Virtual Memory Manager (VMM) unit found in Windows Vista/7/8/8.1 (and Server versions, too, I guess).
4. Windows XP users can also use this method to get more out of their system, but they will need to download a tool called VMM Manager from Microsoft’s website. This tool is not compatible with Vista or later versions of Windows, but it will work with XP.
You can use the Virtual Memory Manager to change how Windows uses virtual memory. By default, Windows will only use a certain amount of virtual memory. If you have more RAM installed on your computer than this amount, the extra RAM will not be used.
You can change this setting so that Windows will use all of your available RAM by following these steps:
1. Open the Control Panel.
2. Select System and Security.
3. Select System.
4. Select Advanced system settings.
5. Select the Advanced tab.
6. Select the Settings button under Performance.
7. Select the Advanced tab again.
8. Under Virtual Memory, select Change
9. Uncheck the box labeled “Automatically manage paging file size for all drives.”
10. Select the drive on which your Windows installation is located. (Usually, this will be C:)
11. Enter the maximum amount of RAM that you want to use for virtual memory in the box labeled “Size of the paging file.” This box should already be filled in with RAM installed on your computer. (For example, if you have 4GB of RAM installed, enter 4096 in this box.)
What is v in chemistry:
V is the symbol for vanadium on the periodic table. It is a soft, silvery-white metal with a relatively high melting point. Vanadium is used in various alloys and as a catalyst. It also has some medical applications.
Vanadium was discovered in 1801 by Andres Manuel del Rio, who named it after the Norse god of thunder, Thor. Vanadium occurs naturally in several minerals, including carnotite, vanadinite, and patronite. It is also found in coal deposits and certain meteorites.
Vanadium is a member of the transition metals group on the periodic table. Its properties are due to its electron configuration, which includes five d-electrons. These electrons can be arranged in different ways, depending on the oxidation state of vanadium. This ability to change oxidation states makes vanadium a versatile metal with many applications.
Vanadium has several industrial applications. It is used in alloys because it strengthens the steel and other metals. It is also used as a catalyst in producing sulfuric acid and other chemicals. Vanadium pentoxide is used in ceramics and glassmaking. And vanadium redox batteries are becoming increasingly popular for energy storage.
Vanadium also has some medical applications. Vanadyl sulfate is used to treat diabetes, and vanadate drugs treat hypertension and heart failure.
Vanadium chemistry:
The chemistry of vanadium is mainly due to its ability to change oxidation states. This means that vanadium can exist as different molecules, depending on the number of electrons. Vanadium has five electrons in its outer shell (V5+) in its most common oxidation state. However, it can also exist as V4+, V3+, V2+, and V1+.
Oxidation states are assigned according to how many electrons a molecule has lost or gained. The number of Roman numerals shows the oxidation state after the element symbol. For example, the oxidation state of copper in Cu2+ is two because it has lost two electrons.
The most common oxidation state of vanadium is V5+. Vanadium in this state is found in V5+ ions. A V5+ ion has five electrons around the central atom, which is stable. It forms when vanadium is reacted with oxygen or water.
However, if there are only four electrons around the central atom of a V5+ ion, that ion becomes unstable and reacts further to gain an electron (and become V4+) or lose an electron (and become VO2+.
The VO2+ ion can also be reduced to form metallic vanadium. This is because VO2+ gains an electron to develop VO2-; both ions have four valence electrons (electrons in the outer shell), but VO2- has more stability than VO2+.