Monday, December 15, 2008


Erosion is the carrying away or dislocation of solids (sediment, soil, rock and other particles) typically by the agents of currents such as, wind, water, or ice by downward or down-slope movement in response to gravity or by living organisms (in the case of bioerosion).

Erosion is illustrious from weathering, which is the procedure of chemical or physical breakdown of the minerals in the rocks, though the two processes may be simultaneous.

Erosion is a noticeable intrinsic natural process but in many places it is increased by human land use. Poor land use practices comprise deforestation, overgrazing, unmanaged construction activity and road-building. Land that is used for the making of agricultural crops generally experiences an important greater rate of erosion than that of land under natural vegetation. This is mainly true if tillage is used, which reduces vegetation cover on the surface of the soil and disturbs both soil structure and plant roots that would otherwise grasp the soil in place. However, better land use practices can limit erosion, using techniques such as terrace-building, protection tillage practices, and tree planting.

Wednesday, December 03, 2008

What is encryption and decryption?

Encryption/decryption is particularly important in wireless communications. This is for the reason that wireless circuits are easier to "tap" than their hard-wired counterparts. On the other hand, encryption/decryption is a good plan when working whichever kind of sensitive transaction, like a credit-card purchase online, or the conversation of a company secret between different departments in the organization. The stronger the cipher -- that is, the harder it is for illegal people to break it -- the better, on the whole. Conversely, as the strength of encryption/decryption increases, therefore does the cost.