Friday, February 23, 2007


Erosion is the displacement of solids by the agents of wind, water or ice, by downward or down-slope movement in response to gravity or by living organisms . Erosion is well-known from weathering, which is the decomposition of rock and particles through processes where no movement is caught up, although the two processes may be concurrent.
Erosion is an intrinsic normal process but in many places it is increased by human land use. Poor land use practices include deforestation, overgrazing, unmanaged construction movement and road or trail building. wever, improved land use practices can limit erosion, using techniques like terrace-building and tree planting.A certain amount of erosion is natural and, in fact, healthy for the ecosystem. For example,
gravels repeatedly move downstream in watercourses. Excessive erosion, however, can cause problems, such as in receipt of water sedimentation, ecosystem damage and outright loss of soil.

Monday, February 19, 2007

Magnetic field in Mercury planet

Despite its slow revolving, Mercury has a relatively strong magnetic field, with a magnetic field strength 1% as strong as the Earth’s. It is potential that this magnetic field is generated in a manner similar to Earth’s, by a dynamo of circulating liquid core material. However, scientists are uncertain whether Mercury’s core could still be liquid,although it could perhaps be set aside liquid by tidal effects during periods of high orbital eccentricity. It is also probable that Mercury’s magnetic field is a remnant of an earlier dynamo effect that has now ceased, with the magnetic field becoming “frozen” in solidified magnetic materials.
Mercury’s magnetic field is physically powerful sufficient to deflect the solar wind around the planet, that creates a magnetosphere within which the solar wind does not go through. This is in difference to the situation on the Moon, which has a magnetic field too weak to stop the solar wind impacting on its surface and so lacks a magnetosphere.

Tuesday, February 13, 2007

Reality, worldviews, and theories of reality

A common slang usage would have "reality" mean "perceptions, beliefs, and attitudes toward reality," as in "My reality is not your reality." This is often used just as a colloquialism indicating that the parties to a conversation agree, or should agree, not to quibble over deeply different conceptions of what is real. For example, in a spiritual discussion between friends, one might say (attempting humor), "You might disagree, but in my reality, everyone goes to heaven.” But occasionally — and mainly in the case of those who have been exposed to certain ideas from viewpoint, sociology, literary criticism, and other fields — it is thought that there simply and factually is no reality beyond the perceptions or beliefs we each have about reality. Such attitudes are summarized in the popular statement, "Perception is reality" or "Life is how you pick out reality" and they show anti-realism, that is, the view that there is no objective reality, whether acknowledged clearly or not.

Tuesday, February 06, 2007


Software basically is the distinct image or representation of physical or material position that constitute configuration to or functional identity of a machine, usually a computer. As a substance of memory, software in principle can be changed without the alteration to the static paradigm of the hardware thus without the remanufacturing thereof. generally software is of an algorithmic form which translates into being to a progression of machine instructions. Some software, however, is of a relational form which translate into being the map of a recognition network.
Software is a program that enables a computer to achieve a specific task, as contrasting to the physical components of the system (hardware). This include application software such as a word processor, which enables a user to achieve a task, and system software such as an operating system, which enables other software to run suitably, by interfacing with hardware and with other software.
The term "software" was first used in this intellect by John W. Tukey in 1957. In computer science and software engineering, computer software is all computer program. The perception of reading different sequences of instructions into the memory of a apparatus to control computations was invented by Charles Babbage as part of his difference engine. The theory that is the source for most modern software was first projected by Alan Turing in his 1935 essay Computable numbers with an application to the Entscheidungs problem.
TypesPractical computer systems partition software into three major classes: system software, programming software and application software, although the division is subjective, and often blurred.
* System software is one of the major class helps run the computer hardware and computer system. It includes working systems, device drivers, analytical tools, servers, windowing systems, utilities and more. The intention of systems software is to protect the applications programmer as much as possible from the details of theexacting computer complex being use, especially memory and other hardware features, and such accessory procedure as communications, printers, readers, displays, keyboards, etc.
* Programming software usually provide tools to support a programmer in writing computer programs and software with different programming languages in a more suitable way.The tools comprise text editors, compilers, interpreters, linkers, debuggers, and so on, An incorporated development environment (IDE) merge those tools into a software bundle, and a programmer may not need to type various command for compiling, interpreter, debugging, tracing, and etc., because the IDE typically has an sophisticated graphical user interface, or GUI.
* Application software allows humans to complete one or more explicit (non-computer related) tasks. typical applications include manufacturingautomation, business software, educational software, medical software, databases and computer games. Businesses are possibly the biggest users of application software, but approximately every field of human action now uses some form of application software. It is used tocomputerizeall sorts of functions.