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  2. Fireplace insert - Wikipedia

    en.wikipedia.org/wiki/Fireplace_insert

    This custom-fitted fireplace insert has large glass doors to maximize the view of the fireplace, and a large surface area heat exchange with thermostat-controlled fan-forced air. A fireplace insert [1] is a device that can be inserted into an existing masonry or prefabricated wood fireplace. Fireplace inserts can be fuelled by gas, wood ...

  3. Resistivity logging - Wikipedia

    en.wikipedia.org/wiki/Resistivity_logging

    Resistivity is a fundamental material property which represents how strongly a material opposes the flow of electric current. In these logs, resistivity is measured using four electrical probes to eliminate the resistance of the contact leads. The log must run in holes containing electrically conductive mud or water, i.e., with enough ions ...

  4. Wood-burning stove - Wikipedia

    en.wikipedia.org/wiki/Wood-burning_stove

    A fireplace insert converts a wood-burning fireplace to a wood-burning stove. A fireplace insert is a self-contained unit that rests inside the existing fireplace and chimney. They produce less smoke and require less wood than a traditional fireplace. Fireplace inserts come in different sizes for large or small homes. [17]

  5. Occupancy sensor - Wikipedia

    en.wikipedia.org/wiki/Occupancy_sensor

    Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.

  6. Noise control - Wikipedia

    en.wikipedia.org/wiki/Noise_control

    Studies on noise barriers have shown mixed results on their ability to effectively reduce noise pollution. [11] Electric and hybrid vehicles could reduce noise pollution, but only if those vehicles make up a high proportion of total vehicles on the road; even if traffic in an urban area reached a makeup of fifty percent electric vehicles, the ...

  7. Spectral noise logging - Wikipedia

    en.wikipedia.org/wiki/Spectral_noise_logging

    Spectral noise logging (SNL) is an acoustic noise measuring technique used in oil and gas wells for well integrity analysis, identification of production and injection intervals and hydrodynamic characterisation of the reservoir. SNL records acoustic noise generated by fluid or gas flow through the reservoir or leaks in downhole well components.

  8. Noise (electronics) - Wikipedia

    en.wikipedia.org/wiki/Noise_(electronics)

    Telecommunication systems strive to increase the ratio of signal level to noise level in order to effectively transfer data. Noise in telecommunication systems is a product of both internal and external sources to the system. Noise is a random process, characterized by stochastic properties such as its variance, distribution, and spectral density.

  9. Spontaneous potential logging - Wikipedia

    en.wikipedia.org/wiki/Spontaneous_potential_logging

    Spontaneous potential log, commonly called the self potential log or SP log, is a passive measurement taken by oil industry well loggers to characterise rock formation properties. The log works by measuring small electric potentials (measured in millivolts) between depths with in the borehole and a grounded electrode at the surface.

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