Introduction The effect of incandescent light on the electrical potentials of etiolated seedlings has been studied by only a few investigators. WALTm E(7) maintained that etiolated seedlings gave little, if any, electrical response when illuminated. CLARK (1), however, has demonstrated changes in the longitudinal electrical polarity in intact etiolated Avena seedlings when they are uniformly il...

Ion mobility spectrometer (IMS) has been widely deployed for on-site detection of explosives. The common nitro-based explosives are usually detected by negative IMS while the emerging peroxide-based explosives are better detected by positive IMS. In this study, a fast polarity-switchable IMS was constructed to detect these two explosive species in a single measurement. As the large traditional ...

In studies of the bioelectric fields of the onion root, ROSENE (2) found that the magnitude of the longitudinal polarity was decreased or shunted when a jacket of tap water was placed around a segment of the root between the contacts. When the shunt was removed, the polarity quickly returned to practically its former level. Similar results were obtained by WnKs and LUND (7) from their experimen...

In this letter, we propose a polarity decision carrier recovery algorithm that is useful for carrier acquisition in high order QAM. The PD (Phase Detector) output and its variance characteristic are mathematically derived and the simulation results are presented. The proposed algorithm shows enhanced acquisition performance especially for large frequency offset. key words: carrier recovery, QAM...

We use a hysteretic Josephson junction as an on-chip detector of the third moment of shot noise of a tunnel junction. The detectable bandwidth is determined by the plasma frequency of the detector, which is about 50 GHz in the present experiment. The third moment of shot noise results in a measurable change of the switching rate when reversing polarity of the current through the noise source. W...

Interneurons in layer 2/3 (L2/3) of the somatosensory cortex show 4 types of axonal projection patterns with reference to the laminae and borders of columns in rat barrel cortex (Helmstaedter et al. 2008a). Here, we analyzed the dendritic geometry and electrical excitability of these interneurons. First, dendritic polarity, measured based on the insertion points of primary dendrites on the soma...

Trace chemical detection plays an important role in evaluating environmental hazards as well benign sources. We have developed a low power dual-polarity ionization-based detector. The detector electronics are operated with single 9 V battery and provide concentration sensitive voltage outputs. mode can be set manually the on-board or controlled microcontroller compatible digital input. complete...