The "nano-ear," a microscopic particle of gold trapped by a laser beam, can detect sound a million times fainter than the threshold for human hearing.
In the case of threshold-based segmentation, faint or very thin spines may appear too small or be missed completely if the chosen threshold is too high.
*rRT-PCR, real-time reverse transcription PCR; Ct, cycle threshold; –, no visible band; +, faint; ++, distinct; +++, strong band after agarose gel electrophoresis of PCR products and staining with ethidium bromide.
A small population (n = 3) displayed a faint VGlut staining that was just above background threshold.
The fainter rings are still far below the visibility threshold.
Any faint hope was snuffed out as soon as he crossed the threshold.
A team led by astronomer Kevin Luhman of the Harvard-Smithsonian Center for Astrophysics (CfA) in Cambridge, Massachusetts, found extra emissions of infrared light from a faint dwarf with just 15 times Jupiter's mass--at the threshold of what astronomers consider "planetary mass".
As the subjects did this, and unbeknownst to them, a faint patch of color, of an appropriate size and shape, and just above the normal threshold of visibility, was back projected (in soft focus) onto the screen.
In contrast, the faint trends for entrants to medical schools using UKCAT as a factor and as a threshold to be more likely to be from low socioeconomic backgrounds were now of borderline significance (P=0.05 and P=0.06, respectively).
Note that a lower threshold value compared to the value used for normal ranging near the asteroid was set so that faint laser pulses could be detected during the spacecraft scan in this experiment.
