The Technology Portal
Technology ("science of craft", from Greek τέχνη, techne, "art, skill, cunning of hand"; and -λογία, -logia) is the collection of techniques, skills, methods, and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation. Technology can be the knowledge of techniques, processes, and the like, or it can be embedded in machines to allow for operation without detailed knowledge of their workings. Systems (e. g. machines) applying technology by taking an input, changing it according to the system's use, and then producing an outcome are referred to as technology systems or technological systems.
The simplest form of technology is the development and use of basic tools. The prehistoric discovery of how to control fire and the later Neolithic Revolution increased the available sources of food, and the invention of the wheel helped humans to travel in and control their environment. Developments in historic times, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale.
Technology has many effects. It has helped develop more advanced economies (including today's global economy) and has allowed the rise of a leisure class. Many technological processes produce unwanted by-products known as pollution and deplete natural resources to the detriment of Earth's environment. Innovations have always influenced the values of a society and raised new questions in the ethics of technology. Examples include the rise of the notion of efficiency in terms of human productivity, and the challenges of bioethics.
Philosophical debates have arisen over the use of technology, with disagreements over whether technology improves the human condition or worsens it. Neo-Luddism, anarcho-primitivism, and similar reactionary movements criticize the pervasiveness of technology, arguing that it harms the environment and alienates people; proponents of ideologies such as transhumanism and techno-progressivism view continued technological progress as beneficial to society and the human condition.
is a video sharing
website that allow users to upload, view and share video clips
. YouTube was created in mid-February 2005
by three former PayPal
employees. The San Bruno
-based service uses Adobe Flash
technology to display a wide variety of video content, including movie
clips and music videos
, as well as amateur content such as videoblogging
and short original videos. In October 2006
, Google Inc.
announced that it had reached a deal to acquire the company for US$
1.65 billion in Google
stock. The deal closed on November 13, 2006. Unregistered users can watch most videos on the site, while registered users are permitted to upload an unlimited number of videos. Some videos are available only to users of age 18 or older (e.g. videos containing potentially offensive content). The uploading of pornography
or videos containing nudity is prohibited. Related videos, determined by title and tags
, appear onscreen to the right of a given video. In YouTube's second year, functions were added to enhance user ability to post video 'responses' and subscribe to content feeds. Few statistics are publicly available regarding the number of videos on YouTube. However, in July 2006 the company revealed that more than 100 million videos were being watched every day, and 2.5 billion videos were watched in June 2006.
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was a German Lutheran mathematician
, and a key figure in the 17th century astronomical revolution. He is best known for his eponymous laws of planetary motion
, codified by later astronomers based on his works Astronomia nova
, Harmonices Mundi
, and Epitome of Copernican Astronomy
. Before Kepler, planets' paths were computed by combinations of the circular motions of the celestial orbs
. After Kepler, astronomers shifted their attention from orbs
—paths that could be represented mathematically as an ellipse
. Kepler's laws also provided one of the foundations for Isaac Newton
's theory of universal gravitation
. During his career Kepler was a mathematics teacher at a Graz
seminary school, an assistant to Tycho Brahe
, the court mathematician to Emperor Rudolf II
, a mathematics teacher in Linz
, and an adviser to General Wallenstein
. He also did fundamental work in the field of optics
and helped to legitimize the telescopic discoveries of his contemporary Galileo Galilei
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