The signal received from the device emulates the same magnetic field change as a mag stripe card when swiped across the same read head.

这个信号模拟了一张磁条卡刷过读头的相同的磁场变化。

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The monolithic switch (50) has a layer (120) for sensing switch actuation by means including resistance change, capacitance change, or magnetic field change.

所述单片开关(50)具有利用电阻变化、电容变化或磁场变化来感测开关的致动的层(120)。

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In the presence of a magnetic field, the atoms' orientation changed in a particular way, and this change was detectable in the light that came through the atom cloud, the team found.

小组发现，在磁场之中，原子的方向以特殊的方式发生的变化，而这种变化可以被穿过原子云的光束探测到。

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The system detects any change in the magnetic field on or behind the goal line to determine if a goal has been scored and alerts the ref.

CNN: Over the line: Goal tech to be used at 2014 World Cup

That would change the way the magnetic field of the iron oxide interacts with the semiconducting behaviour of the lead selenide.

ECONOMIST: MONITOR

Exactly how the fish "imprint" the magnetic field near where they were born is unknown, but the scientists believe the change from fresh to saltwater triggers some kind of neurological process.

BBC: Sockeye salmon 'sense magnetic field of home'