Chaos Theatre

Friday, September 21, 2012

Scientific Calculator Software for windows

Overview

Microsoft Mathematics provides a set of mathematical tools that help students get school work done quickly and easily. With Microsoft Mathematics, students can learn to solve equations step-by-step while gaining a better understanding of fundamental concepts in pre-algebra, algebra, trigonometry, physics, chemistry, and calculus.

Microsoft Mathematics includes a full-featured graphing calculator that’s designed to work just like a handheld calculator. Additional math tools help you evaluate triangles, convert from one system of units to another, and solve systems of equations.

Cilck here to download (for windows 32 bit)
Click here to download (for windows 64 bit)

System requirements

Supported Operating Systems: Windows 7, Windows Server 2003 Service Pack 2, Windows Server 2008 R2, Windows Server 2008 Service Pack 2, Windows Vista Service Pack 2, Windows XP Service Pack 3

.NET Framework Microsoft .NET Framework 3.5 SP1 Free download
Computer processor 500 MHz Pentium processor or equivalent (minimum); 1 GHz Pentium processor or equivalent (recommended)
Memory 256 MB of RAM (minimum); 512 MB or more (recommended)
Display resolution 800 x 600, 256 colors (minimum); 1024 x 768, 32-bit (recommended)
Video Video card with 64 MB of video RAM
Disk space 65 MB available disk space

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With this offer customer will get Unlimited data usage with Fair usage policy up to 2GB in 3G circles, after 2GB you can still enjoy unlimited downloads at speeds of up to 128 kbps for 12 months from the date of activation.

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Click here to see full details

Different types of grounding (differences between chassis ground, earth ground and signal ground)

Ground

Ground is shown on electronics diagrams, but it isn't really a component. It is simply the node which has been assigned a voltage of zero. It is represented by one of the symbols below. Technically, any single node can be assigned as ground, and other voltages are measured relative to it. However, the convention is to only assign it in one of two ways, related to the type of power supply. In a single supply situation, such as a circuit powered by a single battery, the ground point is usually defined as the more negative of the power source's terminals. This makes all voltages in the circuit positive with respect to ground (usually), and is a common convention. For a split-supply device, such as a circuit driven by a center-tapped transformer, usually the center voltage is defined as ground, and there are equal and roughly symmetrical positive and negative voltages in the circuit.


Signal Ground		Chassis Ground		Earth Ground

Signal ground

Ground for a signal. Since wires have a certain amount of resistance to them, ground points in a circuit aren't all at exactly the same voltage. It is important in practical circuit design to separate the power supply ground from the signal ground from the shielding ground, etc. In circuits where minimum noise is especially important, power regulator circuitry should have thick wires or traces connecting the grounds, in a sequence from the power supply to the "cleanest" ground at the output of the filters of the power supply, which will then be a "star point" for the grounds of the signal circuitry.

Chassis ground

A direct connection to the chassis of the device. This is used for EMI shielding and also for safety ground in line AC powered devices.

Earth ground

Used in radio or power distribution systems, a connection to the earth itself. Also the other end of the connection for the safety ground, since the power line voltage will seek a path through the earth back to the power line supply station. This was the original usage of the word "ground", and the more modern meaning of the word would have been called a "floating ground".

The earth ground symbol and signal ground symbol are often interchanged without regard to their original meanings. As far as signal-level electronics (and this book) is concerned, ground almost always means a signal ground or floating ground, not connected to the earth itself.