Portal:Technology

Selected article

It operates using the diesel cycle (named after Dr. Rudolph Diesel). Diesel engines have the highest thermal efficiency of any internal or external combustion engine, because of their compression ratio. They were originally used as a more efficient replacement for stationary steam engines. Since the 1910s they have been used in submarines and ships. Use in locomotives, large trucks and electric generating plants followed later. In the 1930s, they slowly began to be used in a few automobiles. As of 2007, about 50 percent of all new car sales in Europe are diesel.

Selected picture

News

• March 10: Man jailed after Facebook murder case in County Durham, England
• March 7: Paleontologists reaffirm the cause of dino extinction
• March 7: 10 billionth update placed on social networking website Twitter
• March 4: US reveals Internet security efforts
• March 3: Apple sues Taiwanese mobile phone maker HTC
• February 26: Russian Wikipedia reaches half a million articles
• February 14: Chip and PIN 'not fit for purpose', says Cambridge researcher
• February 14: Chicago Metra considers selling naming rights for train lines, stations
• February 13: Airborne laser successfully destroys ballistic missile
• February 10: Google introduces Google Buzz

Did you know...

• ... that both the Mozilla Firefox and Microsoft Internet Explorer web browser design ideas descended from the Mosaic web browser?

• ... that a coherer, hot wire barretter, electrolytic detector, cat's whisker and vacuum tube were all types of radio detectors?

• ... that in 2008 Hewlett-Packard created a prototype of the theoretical fourth and last passive circuit element, the memristor, that may one day revolutionize electronics, although the theory was devised in 1971?

• ... that a mercury arc rectifier converts alternating current to direct current by means of an electric arc through mercury vapor?

• ... that only one of the 266 1076 Class steam locomotives built for the Great Western Railway was named, and the rest had only numbers?

• ... that the six Charles Tayleur locomotives ordered by Isambard Kingdom Brunel for the Great Western Railway were unsuccessful?

• ... that the intensity of a tropical cyclone (pictured) is usually determined by the Dvorak technique using only visible and infrared satellite images?

• ... that the technique of double-balloon enteroscopy allows any position along the gastrointestinal tract to be visualized in real-time?

Lists of basic topics   (all)

Main outlines: Outline of science and Outline of technology

Applied science

Forensics • Forestry • Nanotechology

Business management

Actuarial science • Marketing • Manufacturing

Domestic

Education • Family and consumer science

Energy

Energy development • Energy storage • Nuclear technology

Engineering

Agriculture • Automation • Chemical engineering

Health and safety

Biotechnology • Ergonomics • Firefighting

Industry

Architecture

Construction

Machines

Industrial machinery • Robotics

Mining

Information and communication

Cartography

Computer science

Artificial intelligence • Free software • Information technology • Internet • Programming • Software engineering

Design

Library science

Telecommunication

Radio

Military science

Martial arts

Transport

Aerospace • Space exploration

Vehicles

Automobiles

Bicycles

Notes

Categories   (all)

Main categories: Technology and Applied sciences

Agriculture & Agronomy • Architecture • Automation • Biotechnology • Blu-ray • Cartography • Chemical engineering • Communication (Media studies • Telecommunications) • Construction • Design • Digital divide • Earthquake engineering • Electronics • Energy • Ergonomics • Firefighting • Fire prevention • Forensics • Forestry • Industry • Information science • Information technology • Internet • Management • Manufacturing • Marketing • Medicine (Unsolved problems in neuroscience) • Metalworking • Microtechnology • Military science • Mining • Nanotechnology • Nuclear technology • Nutrition • Optics • Plumbing • Robotics • Sound technology • Space exploration • Technology forecasting • Tools

Computing:  Artificial intelligence • Classes of computers • Companies • Computer architecture • Computer model • Computer science • Computer security • Computing and society • Data • Embedded systems • Free software • Human-computer interaction • Information systems • Internet • Mobile Internet • Languages • Multimedia • Networks • Industrial Networks • Operating systems • Platforms • Product lifecycle management • Programming • Real-time computing • Software • Software engineering • Unsolved problems in computer science • More...

Electronics:   Avionics • RF & MMIC Design • Circuits • Companies • Connectors • Consumer electronics • Digital electronics • Digital media • Electrical components • Electronic design • Electronics manufacturing • Embedded systems • Integrated circuits • Microwave technology • Molecular electronics • Water technology • Optoelectronics • Quantum electronics • RFID • Radio electronics • Semiconductors • Signal cables • Surveillance • Telecommunications • Terminology • More...

Engineering:  Aerospace engineering • Bioengineering • Chemical engineering • Civil engineering • Electrical engineering • Environmental engineering • Materials science • Mechanical engineering • Nuclear technology • Software engineering • Structural engineering • Systems engineering

Transportation:   By country • Automobiles • Aviation • Cycling • Public transport • Rail transport • Road transport • Shipping • Spaceflight • Vehicles • Water transport

Technology timelines

Topics   (all)

Glossaries   (all)

Air pollution dispersion terminology • Blogging • Broadcasting • Computing and IT (Alternative terms for free software • Computer • Fisheries • Fuel cell terms • Internet • Legal terms • Object-oriented programming • Unified Modeling Language) • Firefighting (Equipment • Wildland fires) • Library and information science • Machine vision • Metalworking terminology • Mill machinery • Nautical • Telephony • Textile manufacturing • Transport (Aviation, aerospace, and aeronautics • Automotive design • Rail (Passenger rail • NZ railfan • UK railfan • U.S. railfan) ) • Woodworking (Joinery) • Winemaking

Related portals   (all)

Technology and applied sciences

Agriculture • Agronomy • Architecture (Bridges, Portal) • Biotechnology • Electronics • Energy (Renewable energy) • Engineering • Hazardous Materials • Home improvement • Nanotechnology • Nuclear technology • Robotics

Information technology

Apple Inc. • Blu-ray • Computer networking (Internet (Forums)) • Computer science (Artificial intelligence) • Computer security (Cryptography) • Google • Microsoft • Java • Python programming • Software (Free software (Linux)) • Telecommunication • Typography

Transport

Aviation • Cars (Australian, Japanese) • Bicycles/Cycling • London transport • Nautical • Roads (U.S. Roads) • Spaceflight (Human spaceflight) • Trains (Rapid transit, UK Railways, UK Trams) • UK Waterways