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How can you tell how old your smoke detector is? 

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A sperm age calculator can tell men how "old" their sperm is, revealing changes caused by smoking.
Our algorithm can also tell the amount of smoke present on the image.
Regardless of ownership, the great majority of parents (82 per cent) acquired a free smoke detector, but those previously without a smoke detector were more likely to do so.
This comparison shows how the MLP-based detector outperforms the CA-CFAR detector in all the cases under study.
The comparison of the performances of both detectors shows how the MLP-based detector outperforms the CA-CFAR detector in all the cases under study.
Fiber optic sensor technology offers potential improvements for existing smoke detector technology.
Since these abnormalities were prominent only in smoke-exposed old animals, an interaction between smoke inhalation and aging is indicated.
Plotting the daily median on-time over months or years can show how the detector performance evolves.
It offers a robust, straightforward approach to detect faults, and can measure and compensate for drift across the entire smoke detector system.
This suggests that additional information about how smoke yields are measured or that a better calibration technique is required in order to accurately model smoke alarm response.
Enhancements in O3 during the August smoke-impacted period were also observed at two long-term monitoring sites in Colorado: Rocky Mountain National Park and the Arapahoe National Wildlife Refuge near Walden, CO. Our data provide a new case study of how aged wildfire smoke can influence atmospheric composition at an urban site, and how smoke can contribute to increased O3 abundances across an urban–rural gradient.
They can be installed by a homeowner just as they would a normal smoke detector.
Therefore, such material has potential for use in cigarette smoke detector.
They also show how atmospheric blocking can keep a smoke plume in the same geographic area for over a week.
Based on this result, the value of life saving from smoke detector purchases is increased fivefold.
It is shown that such a smoke detector is able to operate reliably under low concentration of smoke and high relative humidity conditions.

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