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  2. 4 Blocks - Wikipedia

    en.wikipedia.org/wiki/4_Blocks

    4 Blocks is a German drama series. It stars Kida Khodr Ramadan as Ali "Toni" Hamadi, the leader of a drug cartel in Berlin - Neukölln which has strong connections with the Arab crime families including his clan.

  3. Railway signalling - Wikipedia

    en.wikipedia.org/wiki/Railway_signalling

    Most blocks are "fixed", i.e. they include the section of track between two fixed points. On timetable, train order, and token-based systems, blocks usually start and end at selected stations. On signalling-based systems, blocks start and end at signals. The lengths of blocks are designed to allow trains to operate as frequently as necessary.

  4. Signalling block system - Wikipedia

    en.wikipedia.org/wiki/Signalling_block_system

    Signalling block systems enable the safe and efficient operation of railways by preventing collisions between trains. The basic principle is that a track is broken up into a series of sections or "blocks". Only one train may occupy a block at a time, [citation needed] and the blocks are sized to allow a train to stop within them. [1]

  5. European Train Control System - Wikipedia

    en.wikipedia.org/wiki/European_Train_Control_System

    A Radio Block Centre is a specialised computing device with specification safety integrity level 4 (SIL) for generating Movement Authorities (MA) and transmitting it to trains. It gets information from signalling control and from the trains in its section. It hosts the specific geographic data of the railway section and receives cryptographic ...

  6. Communications-based train control - Wikipedia

    en.wikipedia.org/wiki/Communications-based_train...

    CBTC is a signalling standard defined by the IEEE 1474 standard. [1] The original version was introduced in 1999 and updated in 2004. [1] The aim was to create consistency and standardisation between digital railway signalling systems that allow for an increase in train capacity through what the standard defines as high-resolution train location determination. [1]

  7. California mother, teen son found beaten to death in home as ...

    www.aol.com/california-mother-teen-son-found...

    Alicia Montejano, 43, and her son Reuel Huerta were found brutally beaten inside an apartment complex on the 2500 block of Belleview Ave in Stockton, Calif. on Dec. 23. Julio Caesar Valdez, 38, is ...

  8. Why OPEC's grip on oil markets will continue to weaken in 2025

    www.aol.com/why-opecs-grip-oil-markets-193512699...

    Oversupply would rise to 1.4 million barrels per day in 2025 if OPEC+ follows through on plans to unwind quotas in April, the IEA said. Even if production cuts stay in place through all of next ...

  9. Phase-locked loop - Wikipedia

    en.wikipedia.org/wiki/Phase-locked_loop

    A phase-locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the input and output phase in lockstep also implies keeping the input and output frequencies the same, thus a phase-locked loop can also track an input frequency.