Key system

Key System may refer to:

KeY

The KeY tool is used in formal verification of Java programs. It accepts specifications written in the Java Modeling Language to Java source files. These are transformed into theorems of dynamic logic and then compared against program semantics that are likewise defined in terms of dynamic logic. KeY is significantly powerful in that it supports both interactive (i.e. by hand) and fully automated correctness proofs. Failed proof attempts can be used for a more efficient debugging or verification-based testing. There have been several extensions to KeY in order to apply it to the verification of C programs or hybrid systems. KeY is jointly developed by Karlsruhe Institute of Technology, Germany; Technische Universität Darmstadt, Germany; and Chalmers University of Technology in Gothenburg, Sweden and is licensed under the GPL.

Overview

The usual user input to KeY consists of a Java source file with annotations in JML. Both are translated to KeY's internal representation, dynamic logic. From the given specifications, several proof obligations arise which are to be discharged, i.e. a proof has to be found. To this ends, the program is symbolically executed with the resulting changes to program variables stored in so-called updates. Once the program has been processed completely, there remains a first-order logic proof obligation. At the heart of the KeY system lies a first-order theorem prover based on sequent calculus, which is used to close the proof. Interference rules are captured in so called taclets which consist of an own simple language to describe changes to a sequent.

Key System

The Key System (or Key Route) was a privately owned company that provided mass transit in the cities of Oakland, Berkeley, Alameda,Emeryville, Piedmont, San Leandro, Richmond, Albany and El Cerrito in the eastern San Francisco Bay Area from 1903 until 1960, when it was sold to a newly formed public agency, AC Transit. The Key System consisted of local streetcar and bus lines in the East Bay, and commuter rail and bus lines connecting the East Bay to San Francisco by a ferry pier on San Francisco Bay, later via the lower deck of the Bay Bridge. At its height during the 1940s, the Key System had over 66 miles (106 km) of track. The local streetcars were discontinued in 1948 and the commuter trains to San Francisco were discontinued in 1958. The Key System's territory is today served by BART and AC Transit bus service.

History

Early years

The system was a consolidation of several streetcar lines assembled in the late 1890s and early 1900s by Francis Marion "Borax" Smith, an entrepreneur who made a fortune in his namesake mineral, and then turned to real estate and electric traction. The Key System began as the San Francisco, Oakland, and San Jose Railway (SFOSJR), incorporated in 1902. Service began on October 26, 1903 with a 4-car train carrying 250 passengers, departing downtown Berkeley for the ferry pier. Before the end of 1903, the general manager of the SFOSJR devised the idea of using a stylized map on which the system's routes resembled an old-fashioned key, with three "handle loops" that covered the cities of Berkeley, Piedmont (initially, "Claremont" shared the Piedmont loop) and Oakland, and a "shaft" in the form of the Key pier, the "teeth" representing the ferry berths at the end of the pier. The company touted its 'key route', which led to the adoption of the name "Key System".

Nein

Nein (Arabic: نين‎, Na'in, lit. Charming, Hebrew: ניין‎, called in English Bibles Nain or Naim) is an Arab village in Israel that forms part of the Bustan al-Marj Regional Council in the Lower Galilee. Located 14 kilometers (8.7 mi) south of Nazareth, Nein covers a land area of approximately 1,000 dunums. Its total land area consisted of 3,737 dunums prior to 1962. According to the Israeli Central Bureau of Statistics, Nein had a population 1,600 in 2005. The city hall for the Bustan al-Marj Regional Council is located in Nein.

Location

Nein lies a short distance from Mount Tabor. A hill known in Arabic as Tell el-Ajul lay on the path that ran between Nein and nearby Indur, an Arab village destroyed in the 1948 Arab-Israeli war. While Edward Robinson describes Nein as lying on the northern slope of a hill called, "the little Hermon," and it is described in biblical guidebooks as lying at the foot of the Hill of Moreh.

Biblical associations

Edward Robinson and Eli Smith, who visited Palestine in the mid-19th century, identified Nein as, "the Nain of the New Testament," where, according to the Bible (Gospel of Luke 7:11-17), Jesus raised a young man from death and reunited him with his mother.

Hämatom

Hämatom (German for Hematoma) is a rock band from Germany.

History

Hämatom was first formed in September 2004. In December of that year the band performed at The Night Before Christmas in Hollfeld. Demo singles are known to exist for Häschen and Butzemann, both of which later appeared on their debut EP, Nein. In 2005, the band released Nein. They later caught the attention of JBO, toured with them and signed to their Megapress record label, where their next two albums were released. In 2011 the band played Wacken Open Air, gaining them their first international exposure. In 2012 they supported Megaherz on their tour, including their first shows in Russia. In July 2013 the band played at the Sofia Rocks Festival in Bulgaria, photos of them with Rammstein have been circulating the internet. It has been announced on Hämatom's official website that a third album called Keinzeitmensch and single titled Alte Liebe Rostet Nicht are to be released in 2013.

In fall 2013, Hämatom toured with Vlad In Tears performing 8 shows throughout Germany.

Nein (disambiguation)

Nein is a village in Israel.

Nein may also refer to:

Persons with the surname