High Speed Grinding

High Speed Grinding (HSG) is a rail care concept developed by the company Stahlberg Roensch from Seevetal, Germany. It is based on the principle of rotational grinding and serves to grind rails at up to 100 km/h (62 mph).

Background

Since roughly the beginning of the 1990s, rail network operators have experienced increasing problems with rail surface defects. Head checks, squats, corrugation and slip waves all contribute to higher maintenance costs, intensified noise pollution, traffic obstructions, and ultimately a shortened rail lifespan. These increasingly common flaws are exacerbated by the growing density and speed of both freight and passenger traffic. The direct consequence of these problems is a growing need for rail maintenance.

The primary challenge for modern rail maintenance is that less time is available to perform it due to higher traffic densities. Conventional rail maintenance machines (e.g. rail milling, planing or grinding) working at speeds from 1 to 10 km/h (0.6 to 6 mph) can only work during possession time (track closure) which is in most cases only available at night.

High Speed (disambiguation)

High Speed is a pinball game.

High Speed or high-speed may also refer to:

Air, flight, and flight research

Electronics, integrated circuits, and computer interfaces

High-speed rail

High-speed rail is a type of rail transport that operates significantly faster than traditional rail traffic, using an integrated system of specialized rolling stock and dedicated tracks. While there is no single standard that applies worldwide, new lines in excess of 250 km/h and existing lines in excess of 200 km/h are widely considered to be high-speed, with some extending the definition to include much lower speeds (e.g. 160 km/h) in areas for which these speeds still represent significant improvements. The first such system began operations in Japan in 1964 and was widely known as the bullet train. High-speed trains normally operate on standard gauge tracks of continuously welded rail on grade-separated right-of-way that incorporates a large turning radius in its design.

Many countries have developed high-speed rail to connect major cities, including Austria, Belgium, China, France, Germany, Italy, Japan, Poland, Portugal, Russia, South Korea, Spain, Sweden, Taiwan, Turkey, United Kingdom, United States and Uzbekistan. Only in Europe does HSR cross international borders. China has 19,000 km of HSR as of December 2015, accounting for two thirds of the world's total.

Free! (anime)

Free! is a Japanese anime television series directed by Hiroko Utsumi and produced by Kyoto Animation and Animation Do. The anime is based on the light novel written by Kōji Ōji, High Speed! (ハイ☆スピード!, Hai Supīdo!), which received an honorable mention in the second Kyoto Animation Award contest in 2011 and was later published in July 2013. The first season, titled Free! - Iwatobi Swim Club for international distribution, aired in Japan between July and September 2013, and the second season, titled Free! - Eternal Summer, aired between July and September 2014. An animated film, High Speed! - Free! Starting Days, was released on December 5, 2015.

Plot

Free! is set in the town of Iwatobi, which is based on the real town of Iwami, Tottori. Iwami has since used Free! to promote tourism to the town. The story starts with four boys—Haruka, Makoto, Nagisa and Rin—before they graduate from elementary school. They all participated in a swimming tournament and won, though they parted ways. Years later, Haruka and Makoto reunite with Nagisa when he enrolls in their high school. Not long after, Rin, who was thought to be in Australia, turns up and challenges Haruka to a race and wins. Afterward, Nagisa suggests creating a swimming club and using the school's run-down outdoor pool. Haruka, Makoto, Nagisa, and later on, Rei, create the Iwatobi High School Swimming Club and work together to make the club a success. Rin's victory over Haruka means nothing to him as he realizes that Haruka had stopped swimming competitively and wasn't in top shape. He claims that he cannot get over the fact until Haruka competes against him for real. The members of the revived Iwatobi Swim Club later enter a swimming competition against Rin.