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  2. Streamlines, streaklines, and pathlines - Wikipedia

    en.wikipedia.org/wiki/Streamlines,_streaklines...

    In the aircraft example, the observer on the ground will observe unsteady flow, and the observers in the aircraft will observe steady flow, with constant streamlines. When possible, fluid dynamicists try to find a reference frame in which the flow is steady, so that they can use experimental methods of creating streaklines to identify the ...

  3. Kernel (operating system) - Wikipedia

    en.wikipedia.org/wiki/Kernel_(operating_system)

    An example would be from supervisor mode to protected mode. This is where the operating system performs actions like accessing hardware devices or the memory management unit. Generally the operating system provides a library that sits between the operating system and normal user programs. Usually it is a C library such as Glibc or Windows API ...

  4. Software bloat - Wikipedia

    en.wikipedia.org/wiki/Software_bloat

    For example, a program that once could only save in text format is now required to save in HTML, XML, XLS, CSV, PDF, DOC, and other formats. Niklaus Wirth has summed up the situation in Wirth's law , which states that software speed is decreasing more quickly than hardware speed is increasing.

  5. Streamline upwind Petrov–Galerkin pressure-stabilizing Petrov ...

    en.wikipedia.org/wiki/Streamline_upwind_Petrov...

    The streamline upwind Petrov–Galerkin pressure-stabilizing Petrov–Galerkin formulation for incompressible Navier–Stokes equations can be used for finite element computations of high Reynolds number incompressible flow using equal order of finite element space (i.e. ) by introducing additional stabilization terms in the Navier–Stokes Galerkin formulation.

  6. List of operating systems - Wikipedia

    en.wikipedia.org/wiki/List_of_operating_systems

    JNode (Java New Operating System Design Effort), written 99% in Java (native compiled), provides own JVM and JIT compiler. Based on GNU Classpath. [36] [37] JX Java operating system that focuses on a flexible and robust operating system architecture developed as an open source system by the University of Erlangen. KERNAL (default OS on ...

  7. Euler equations (fluid dynamics) - Wikipedia

    en.wikipedia.org/wiki/Euler_equations_(fluid...

    For certain problems, especially when used to analyze compressible flow in a duct or in case the flow is cylindrically or spherically symmetric, the one-dimensional Euler equations are a useful first approximation. Generally, the Euler equations are solved by Riemann's method of characteristics.

  8. Rate-monotonic scheduling - Wikipedia

    en.wikipedia.org/wiki/Rate-monotonic_scheduling

    Deos, a time and space partitioned real-time operating system containing a working Rate Monotonic Scheduler. Dynamic priority scheduling; Earliest deadline first scheduling; RTEMS, an open source real-time operating system containing a working Rate Monotonic Scheduler. Scheduling (computing) Queueing theory; Kingman's formula

  9. Priority inversion - Wikipedia

    en.wikipedia.org/wiki/Priority_inversion

    With priority ceiling protocol, the shared mutex process (that runs the operating system code) has a characteristic (high) priority of its own, which is assigned to the task of locking the mutex. This works well, provided the other high-priority task(s) that tries to access the mutex does not have a priority higher than the ceiling priority.