Technology ("science of craft", from Greekτέχνη, techne, "art, skill, cunning of hand"; and -λογία, -logia) is the sum 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 invention of shaped stone tools followed by the discovery of how to control fire increased sources of food. The later Neolithic Revolution extended this, and quadrupled the sustenance available from a territory. The invention of the wheel helped humans to travel in and control their environment.
3D rendering of a Dyson sphere utilizing large, orbiting panels
A Dyson sphere is a hypothetical megastructure that completely encompasses a star and captures a large percentage of its power output. The concept is a thought experiment that attempts to explain how a spacefaring civilization would meet its energy requirements once those requirements exceed what can be generated from the home planet's resources alone. Only a tiny fraction of a star's energy emissions reaches the surface of any orbiting planet. Building structures encircling a star would enable a civilization to harvest far more energy.
The first contemporary description of the structure was by Olaf Stapledon in his science fiction novel Star Maker (1937), in which he described "every solar system... surrounded by a gauze of light traps, which focused the escaping solar energy for intelligent use." The concept was later popularized by Freeman Dyson in his 1960 paper "Search for Artificial Stellar Sources of Infrared Radiation." Dyson speculated that such structures would be the logical consequence of the escalating energy needs of a technological civilization and would be a necessity for its long-term survival. He proposed that searching for such structures could lead to the detection of advanced, intelligent extraterrestrial life. Different types of Dyson spheres and their energy-harvesting ability would correspond to levels of technological advancement on the Kardashev scale. (Full article...)
Highway 410 was built along the alignment of Heart Lake Road south of Bovaird Drive, while north of Bovaird Drive it was built along a new alignment. The highway was designated in 1978 between Highway 401 and Bovaird Drive (later Highway 7), though it was only two lanes wide and had at-grade intersections. It was widened throughout the 1980s and completed as a freeway in 1991. In 2003, construction began on a northward extension of the freeway that was completed in November 2009. (Full article...)
The EMD SDP40F was a six-axle 3,000 hp (2.2 MW) C-Cdiesel–electriclocomotive built by General Motors Electro-Motive Division (EMD) from 1973–1974. EMD built 150 for Amtrak, the operator of most intercity passenger trains in the United States. Amtrak, a private company but funded by the United States government, had begun operation in 1971 with a fleet of aging diesel locomotives inherited from various private railroads. The SDP40F was the first diesel locomotive built new for Amtrak and for a brief time they formed the backbone of the company's long-distance fleet.
A series of derailments in the mid-1970s shattered Amtrak's confidence in the locomotive, and many railroads banned it from their tracks. Multiple investigations pointed to issues with the locomotive's trucks, the weight of the water and steam generators used for train heating, or the harmonic vibration of baggage cars behind the locomotive. In 1977 Amtrak decided to move on from the SDP40F in favor of the EMD F40PH, which was already in use on short-distance routes. Amtrak traded most of its fleet into EMD; the components were incorporated into new F40PHs. The remainder were traded to the Atchison, Topeka and Santa Fe Railway (ATSF) for use in freight service. The Santa Fe rebuilt the locomotives and designated them SDF40-2. The Burlington Northern Santa Fe Railway (BNSF), successor to the Santa Fe, retired them in 2002. One of them is preserved, that one being ex-Amtrak No. 644. (Full article...)
On February 9, 1899, John V. Moran was bound from Milwaukee for Muskegon, Michigan, with a cargo of barreled flour and various package goods, when a piece of ice cut a hole in her hull, causing water to leak in on Lake Michigan. Her crew alerted the nearby steamerNaomi using John V. Moran's whistle. Three of John V. Moran's crew walked across the ice to Naomi. Upon receiving the crew of John V. Moran, Naomi headed over to John V. Moran and removed the rest of her crew. On February 10, Naomi took John V. Moran in tow, but she was leaking too badly to make it to Muskegon. On the morning of February 11, John V. Moran's crew walked back to her across the ice in order to retrieve everything of value on board. Her crew arrived at Grand Haven, Michigan, the following night. The John V. Moran was still afloat on February 12, having been sighted by the ferryMuskegon who was on her way to Muskegon. She sank without loss of life the same day. (Full article...)
NY 26, as a single route, was established in the 1930 renumbering of state highways in New York; however, portions of the route had been signed state routes since the 1920s. Since 1930, the route has been realigned several times in the North Country, resulting in a modern routing significantly different from its initial alignment. For a brief period during the 1970s, NY 26 ended in Carthage. The truncation directly led to the elimination of one of NY 26's two spur routes, and the second was absorbed by other routes shortly afterward. (Full article...)
K-19 is a 33.915-mile-long (54.581 km) state highway in the U.S. state of Kansas. From U.S. Route 50 (US-50) to K-19 Spur it is signed as north–south and from K-19 Spur to US-281 it is signed as east–west. K-19's southern terminus is at US-50 in Belpre, and the eastern terminus is at US-281 east of Seward.
Before state highways were numbered in Kansas, there were auto trails. The southern terminus follows the former New Santa Fe Trail. The northern terminus of K-19 Spur follows the former National Old Trails Road and Old Santa Fe Trail. K-19 was first designated in 1926, and at that time started in Belpre and ended in Larned. Then between 1931 and 1932, K-19 was extended east, from south of Larned, along the former K-37 designation to K-8, now US-281. (Full article...)
Google Earth is a computer program, formerly known as Keyhole EarthViewer, that renders a 3D representation of Earth based primarily on satellite imagery. The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles. Users can explore the globe by entering addresses and coordinates, or by using a keyboard or mouse. The program can also be downloaded on a smartphone or tablet, using a touch screen or stylus to navigate. Users may use the program to add their own data using Keyhole Markup Language and upload them through various sources, such as forums or blogs. Google Earth is able to show various kinds of images overlaid on the surface of the earth and is also a Web Map Service client. Recently Google has revealed that Google Earth now covers more than 98 percent of the world, and has captured 10 million miles of Street View imagery, a distance that could circle the globe more than 400 times.
In addition to Earth navigation, Google Earth provides a series of other tools through the desktop application, including a measure distance tool. Additional globes for the Moon and Mars are available, as well as a tool for viewing the night sky. A flight simulator game is also included. Other features allow users to view photos from various places uploaded to Panoramio, information provided by Wikipedia on some locations, and Street View imagery. The web-based version of Google Earth also includes Voyager, a feature that periodically adds in-program tours, often presented by scientists and documentarians. (Full article...)
The Lynden–Everson highway was built in the 1880s as a wagon road, with onward connections to Nooksack via a ferry over the Nooksack River that was later replaced with a bridge. It was paved by the Whatcom County government in the 1930s and incorporated into the state highway system in 1951 as a branch of Secondary State Highway 1A. During the 1964 state highway renumbering, the branch became SR 544. The Nooksack River bridge between Everson and Nooksack was replaced in 1994 after a major flood damaged the old structure. (Full article...)
With the creation of the U.S. Highway System in 1926, present-day MD 97 north of Westminster became a part of US 140. MD 97 was first designated by 1933 from MD 27/MD 410 (now US 29) in Silver Spring to north of US 40 in Cooksville. Two portions of the route between Cooksville and Westminster became MD 570 in 1939. In 1956, MD 97 was extended north from Cooksville to the Pennsylvania border northwest of Emmitsburg, Frederick County. It replaced the two sections of MD 570 and replaced the MD 32 designation between Westminster and the Pennsylvania border. MD 97 was rerouted to bypass Westminster in 1960 and was moved to a new alignment between Westminster and Taneytown in 1965; both former alignments became MD 32. In 1961, the route was realigned between MD 26 and MD 32, with the former segment becoming MD 854. MD 97 was rerouted to its current northern terminus in 1979, replacing that portion of US 140, while the former route between Westminster and northwest of Emmitsburg became part of MD 140. (Full article...)
Sherwood Park Freeway is a 7.1-kilometre (4.4 mi) freeway that connects east Edmonton to Sherwood Park in Alberta, Canada. It begins in the Gainer Industrial area where Argyll Road and 82 (Whyte) Avenue merge before intersecting 50 Street. It then curves slightly northeast through industrial areas in southeast Edmonton across 34 Street into Strathcona County, then across 17 Street after which the freeway ends at Anthony Henday Drive. It then continues into Sherwood Park as Wye Road (Highway 630). It is primarily a commuter route, with heavier weekday volume westbound in the morning and eastbound in the afternoon as residents of Sherwood Park commute to Edmonton.
Officially designated by Alberta Transportation as Highway 100, construction of Sherwood Park Freeway was completed in 1968 as a free-flowing alignment of Highway 14 several hundred metres north of the former two-lane road which was then re-signed as Highway 14A, and is now known as 76 Avenue. Whitemud Drive took over the designation of Highway 14 upon its completion in the late 1990s. (Full article...)
A filling station in Sabah, Malaysia, operated by Royal Dutch Shell. Filling stations, also known under a wide variety of names, are facilities that sell fuel and engine lubricants for motor vehicles. They include one or more fuel dispensers, which distribute fuels such as gasoline and diesel into the tanks within vehicles and calculate the financial cost of the fuel transferred. Filling stations may also include air compressors and electricity sockets, which may inflate tyres or offer charging stations. Many filling stations also incorporate a convenience store, where customers can purchase snacks and other goods.
The Geneva drive is a gear mechanism that translates a continuous rotation into an intermittent rotary motion. The rotating drive wheel has a pin that reaches into a slot of the driven wheel advancing it by one step. The drive wheel also has a raised circular blocking disc that locks the driven wheel in position between steps. Such a mechanism is used in film projectors, watches, and indexing tables, among others.
An escalator is a moving staircase for carrying people between floors of a building. The device consists of a motor-driven chain of individual, linked steps that move up or down on tracks, allowing the step treads to remain horizontal.
The pin tumbler lock is a lock mechanism that utilizes a group of pins of varying lengths to prevent opening the lock without the correct key. Pin tumblers are most commonly employed in cylinder locks, but may also be found in tubular or radial locks.
When the correct key is inserted, the gaps between the key pins (red) and driver pins (blue) align with the edge of the plug (yellow).
The Wiesen Viaduct is a single-track railway viaduct (concrete blocks with dimension stone coverage) which spans the Landwasser southwest of the hamlet of Wiesen, Switzerland. Designed by Henning Friedrich, then the chief engineer of the Rhaetian Railway, it was built between 1906 and 1909 by the contractor G. Marasi (Westermann & Cie, Zürich) under the supervision of P. Salaz and Hans Studer (RhB). The Rhaetian Railway still owns and uses the viaduct today for regular service with 29 passenger trains per day. An important element of the Davos–Filisur railway, the viaduct is 88.9 metres (292 ft) high, 210 metres (690 ft) long, and has a main span of 55 metres (180 ft). In 1926, the viaduct was the inspiration for Ernst Ludwig Kirchner's painting Brücke bei Wiesen.
"Big Pete" Ramagos, rigger at work on Douglas Dam, Tennessee, June 1942. A rigger is a person or company which specializes in the lifting and/or moving of extremely large and/or heavy objects. Riggers use equipment expressly designed for moving and lifting objects where ordinary material handling equipment cannot go.
A self-portrait by the Mars rover Curiosity on October 31, 2012. The mosaic is stitched from a set of 55 images taken by the Mars Hand Lens Imager at "Rocknest," the spot in Gale crater where the mission's first scoop sampling took place. Self-portraits such as this help NASA document the state of the rover and track changes, such as dust accumulation and wheel wear.
WhatsApp Messenger, or simply WhatsApp, is an American freeware, cross-platformcentralizedmessaging and voice-over-IP (VoIP) service owned by Facebook, Inc. It allows users to send text messages and voice messages, make voice and video calls, and share images, documents, user locations, and other content. WhatsApp's client application runs on mobile devices but is also accessible from desktop computers, as long as the user's mobile device remains connected to the Internet while they use the desktop app. The service requires each user to provide a standard cellularmobile telephone number for registering with the service. In January 2018, WhatsApp released a standalone business app targeted at small business owners, called WhatsApp Business, to allow companies to communicate with customers who use the standard WhatsApp client. (Full article...)
Twitter is an American microblogging and social networking service on which users post and interact with messages known as "tweets". Registered users can post, like, and retweet tweets, but unregistered users can only read them. Users access Twitter through its website interface or its mobile-device application software ("app"), though the service could also be accessed via SMS before April 2020. Twitter, Inc. is based in San Francisco, California, and has more than 25 offices around the world. Tweets were originally restricted to 140 characters, but was doubled to 280 for non-CJK languages in November 2017. Audio and video tweets remain limited to 140 seconds for most accounts. (Full article...)