Tuesday, July 31, 2007

Cascading Style Sheets
In web development, Cascading Style Sheets (CSS) is a stylesheet language use to express the arrangement of a article write in a markup language. Its most general function is to technique web pages written in HTML and XHTML, but the language can be useful to any kind of XML document, include SVG and XUL.

CSS is apply by both the authors and readers of web pages to describe colors, fonts, layout, and other aspect of document arrangement. It is considered primarily to facilitate the severance of document content from document production. This severance can improve content ease of access, provide more flexibility and control in the measurement of presentational character, and decrease density and replication in the structural content.

Thursday, July 26, 2007

Data warehouse

A data warehouse is the major storehouse of an organization chronological data, its business memory. It contain the raw objects for management's conclusion support system. The vital factor leading to the use of a data warehouse is that a data forecaster can do complex query and study, such as data mining, on the information without slow down the ready systems.

A data warehouse might be new to find the day of the week on which a corporation sell the most widgets in May 1992, or how worker sick go away the week before the winter shatter differed stuck between California and New York from 2001-2005.

While prepared systems are optimized for effortlessness and speed of alteration through important use of database normalization and an entity-relationship reproduction, the data store is optimized for coverage and examination. Frequently data in data warehouse are deeply denormalised, summarised or store in a dimension-based representation.

Friday, July 20, 2007

Computer science

Computer science, or computing science, is the study of the academic basics of information and calculation and their completion and request in computer systems. Computer science has many sub-fields; some stress the computation of exact results, while others relay to property of computational harms. Still others hub on the challenge in implementing computations. For example, programming language assumption studies approach to relating computation, while computer programming applies specific programming language to resolve specific computational troubles with solutions. A further subfield, human-computer communication, focuses on the challenge in creation computers and computations helpful, working and commonly available to people.

Computer science is measured by some to have a much earlier association with arithmetic than lots of scientific disciplines. Early computer science was powerfully prejudiced by the work of mathematicians such as Kurt Gödel and Alan Turing, and there continues to be a useful exchange of thoughts between the two field in areas such as statistical logic, category assumption, domain assumption, and algebra.

Monday, July 16, 2007

Automated teller machine

An automated teller machine (ATM) is a programmed telecommunications device that provide the consumers of a financial organization with access to financial transactions in a public legroom without the need for a soul clerk or bank cashier. On most modern ATMs, the client is identified by insert a plastic ATM card with a magnetic strip or a artificial smartcard with a chip, that contain a single card number and some defense information, such as an finishing date or CVC. Security is provide by the customer ingoing a personal identification number (PIN).

Using an ATM, clientele can access their bank account in order to make cash withdrawal and check their account balance. Many ATMs also allow public to deposit cash or checks, move money between their bank accounts, pay bills, or acquire goods and services.

ATMs are known by a range of casual terms include automated banking machine, cash machine, hole-in-the-wall, cashpoint or Bancomat. The occasionally-used term ATM engine is an example of RAS pattern.

Thursday, July 12, 2007

Embedded system
An embedded system is a special-purpose computer system planned to achieve a devoted function. Unlike a general-purpose computer, such as a personal computer, an embedded system perform one or a few pre-defined tasks, usually with very detailed supplies, and frequently includes task-specific hardware and automatic parts not typically found in a general-purpose computer. Since the system is devoted to exact tasks, design engineers can optimize it, dropping the size and cost of the produce. Embedded systems are often mass-produced, benefit from economy of scale.

Physically, embedded systems sort from portable devices such as digital watches and MP3 players, to large stationary installations like traffic lights, factory controller, or the system controlling nuclear power plants. In terms of intricacy embedded systems run from simple, with a single microcontroller chip, to very multifaceted with multiple units, peripherals and networks mount inside a large skeleton or field.

Wednesday, July 04, 2007


Nanotechnology is a field of applied science and technology cover a broad variety of topic. The main unify theme is the manage of matter on a scale lesser than 1 micrometre, normally between 1-100 nanometers, as well as the manufacture of strategy on this same length scale. It is a highly multidisciplinary field, sketch from fields such as colloidal discipline, device physics, and supramolecular chemistry. Much conjecture exists as to what new science and technology might answer from these lines of study. Some view nanotechnology as a advertising term that describes pre-existing lines of explore applied to the sub-micron size level.

Despite the obvious cleanness of this definition, nanotechnology actually encompass diverse lines of question. Nanotechnology cuts across many discipline, including colloidal science, chemistry, applied physics, material science, and even automatic and electrical engineering. It could variously be seen as an addition of existing sciences into the nanoscale, or as a recasting of existing sciences using a newer, more current term. Two main approach are used in nanotechnology: one is a "bottom-up" approach where materials and strategy are built from molecular components which accumulate themselves chemically using morality of molecular gratitude; the other being a "top-down" advance where nano-objects are construct from larger entity without atomic-level manage.