Ultra

Ultra was the designation adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park.Ultra eventually became the standard designation among the western Allies for all such intelligence. The name arose because the intelligence thus obtained was considered more important than that designated by the highest British security classification then used (Most Secret) and so was regarded as being Ultra secret. Several other cryptonyms had been used for such intelligence. British intelligence first designated it Boniface—presumably to imply that it was the result of human intelligence. The U.S. used the codename Magic for its decrypts from Japanese sources.

Much of the German cipher traffic was encrypted on the Enigma machine. Used properly, the German military Enigma would have been virtually unbreakable; in practice, shortcomings in operation allowed it to be broken. The term "Ultra" has often been used almost synonymously with "Enigma decrypts". However, Ultra also encompassed decrypts of the German Lorenz SZ 40/42 machines that were used by the German High Command, and the Hagelin machine and other Italian and Japanese ciphers and codes such as PURPLE and JN-25.

Shatabdi Express

Shatabdi Express trains are a series of fast (called superfast in India) passenger trains operated by Indian Railways to connect Metro cities with other cities important for tourism, pilgrimage or business. Shatabdi Express are day-trains and they return to the station of origin the same day.

The Shatabdis are among the fastest trains in India and the Indian Railways consider them as prestigious. The Shatabdi Express trains run over short to medium distances while the Rajdhani Expresses and the Duronto Expresses are long-distance trains. Rajdhani Expresses connect the nation's capital New Delhi to capitals of states and other major cities while Duronto Expresses connect connect major cities to other major cities. All three series of trains have a maximum speed of about 130 km/h (81 mph). The 12001 Bhopal Shatabdi express, however, runs at a peak speed of 150 km/h (93 mph), which makes it the fastest train in India.

History

The word "Shatabdi" means centenary in Sanskrit, Hindi and several Indian languages. The first Shatabdi train was started in 1988 to commemorate the centenary of Pandit Jawahar Lal Nehru's Birthday (the First Prime Minister of India) by Madhav Rao Scindia, minister for railways. It operated from New Delhi Railway Station to Jhansi Junction, later extended to Bhopal. It is now known as the Bhopal Shatabdi Express.

Ultramarathon

An ultramarathon, also called ultra distance, is any footrace longer than the traditional marathon length of 42.195 kilometres (26.219 mi).

There are two types of ultramarathon events: those that cover a specified distance, and events that take place during specified time (with the winner covering the most distance in that time). The most common distances are 50 kilometres (31.069 mi), 100 kilometres (62.137 mi), 50 miles (80.4672 km), and 100 miles (160.9344 km), although many races have other distances. The 100 kilometers is recognized as an official world record event by the International Association of Athletics Federations (IAAF), the world governing body of track and field.

Other distances/times include double marathons, 24-hour races, and multiday races of 1,000 miles (1,600 km) or even longer. The format of these events and the courses vary, ranging from single or multiple loops (some as short as a 400-metre (1,300 ft) track), to point-to-point road or trail races, to cross-country rogaines. Many ultramarathons, especially trail challenges, have severe course obstacles, such as inclement weather, elevation change, or rugged terrain. Many of these races are run on dirt roads or mountain paths, though some are run on paved roads as well. Usually, there are aid stations every 20 to 35 kilometres (12 to 22 mi) apart, where runners can replenish food and drink supplies or take a short break. Timed events range from 6, 12, and 24 hours to 3, 6, and 10 days (known as multi-day events). Timed events are generally run on a track or a short road course, often one mile (1.6 km) or less.