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  2. Lecture Notes in Physics - Wikipedia

    en.wikipedia.org/wiki/Lecture_Notes_in_Physics

    Lecture Notes in Physics (LNP) is a book series published by Springer Science+Business Media in the field of physics, including articles related to both research and teaching. It was established in 1969.

  3. Conservation law - Wikipedia

    en.wikipedia.org/wiki/Conservation_law

    These quantities are conserved in certain classes of physics processes, but not in all. A local conservation law is usually expressed mathematically as a continuity equation, a partial differential equation which gives a relation between the amount of the quantity and the "transport" of that quantity. It states that the amount of the conserved ...

  4. Time-sharing - Wikipedia

    en.wikipedia.org/wiki/Time-sharing

    Bob Bemer used the term time-sharing in his 1957 article "How to consider a computer" in Automatic Control Magazine and it was reported the same year he used the term time-sharing in a presentation. [6] [8] [9] In a paper published in December 1958, W. F. Bauer wrote that "The computers would handle a number of problems concurrently ...

  5. Detailed balance - Wikipedia

    en.wikipedia.org/wiki/Detailed_balance

    A Markov process is called a reversible Markov process or reversible Markov chain if there exists a positive stationary distribution π that satisfies the detailed balance equations [13] =, where P ij is the Markov transition probability from state i to state j, i.e. P ij = P(X t = j | X t − 1 = i), and π i and π j are the equilibrium probabilities of being in states i and j, respectively ...

  6. Outline of physics - Wikipedia

    en.wikipedia.org/wiki/Outline_of_physics

    Physics – branch of science that studies matter [9] and its motion through space and time, along with related concepts such as energy and force. [10] Physics is one of the "fundamental sciences" because the other natural sciences (like biology, geology etc.) deal with systems that seem to obey the laws of physics. According to physics, the ...

  7. Energy balance - Wikipedia

    en.wikipedia.org/wiki/Energy_balance

    Energy balance may refer to: Earth's energy balance , the relationship between incoming solar radiation, outgoing radiation of all types, and global temperature change. Energy accounting , a system used within industry, where measuring and analyzing the energy consumption of different activities is done to improve energy efficiency

  8. Petroleum Division (Pakistan) - Wikipedia

    en.wikipedia.org/wiki/Petroleum_Division_(Pakistan)

    It is 100% owned by the Government of Pakistan and operates under the Ministry of Petroleum and Natural Resources. The purpose of creating this company was to separate the regulatory and commercial functions to efficiently manage the Government's interest in petroleum exploration and production joint ventures which was previously managed by ...

  9. Khyber Pakhtunkhwa - Wikipedia

    en.wikipedia.org/wiki/Khyber_Pakhtunkhwa

    Khyber Pakhtunkhwa's share of Pakistan's GDP has historically comprised 10.5%, amounting to over US$ 30 billion. [5] The province is home to 16.9 percent of Pakistan's total population. The province is multiethnic, with the main ethnic groups being the Pashtuns, Hindkowans, Saraikis, and Chitralis. [6] [7]