Auditory neurons in the inferior colliculus (IC) of the pallid bat have highly rate selective responses to downward frequency modulated (FM) sweeps attributable to the spectrotemporal pattern of their echolocation call (a brief FM pulse). Several mechanisms are known to shape FM rate selectivity within the pallid bat IC. Here we explore how two mechanisms, stimulus duration and high-frequency i...

Under conditions of nutrient limitation, Bacillus subtilis cells terminally differentiate into a dormant spore state. Progression to sporulation is controlled by a genetic circuit structured as a phosphorelay embedded in multiple transcriptional feedback loops, and which is used to activate the master regulator Spo0A by phosphorylation. These transcriptional regulatory interactions are “bandpas...

This paper proposes a technique to enhance the quality factor (Q) of resonator, which can then be used realise bandpass filters (BPFs) with reduced insertion loss (IL) and improved passband selectivity. The main idea behind this is introduce negative resistance through parametric amplification effect, compensate losses from non-ideal passive components (e.g. capacitors, inductors, microstrips)....

A protocol has been previously described for recording surface paraspinal electromyographic (SEMG) potentials at fifteen paired sites (4 cervical, 7 thoracic, 3 lumbar, 1 sacral) using a bandpass (range of sampled frequencies) of 100 200 Hz. In this paper, normative data from eighty human subjects are presented using this protocol and a 25 500 Hz bandpass.The advantages of a 25 500 Hz bandpass ...

In this paper a two stage bandpass MASH (multi-stage noise shaping) sigma-delta ( Σ∆ ) modulator is presented. A resolution of 14 bits has been achieved over a 5 MHz band around an intermediate frequency (IF) of 20 MHz with a clock frequency of 80 MHz. This performance is obtained using a 6-th order bandpass Σ∆ modulator followed by a 10 bit pipeline converter. The proposed circuit has been ext...

We report on the formulation and electrical control of the position and bandwidth of reflective bandpass filters prepared from cholesteric liquid crystal (CLC) in the infrared (3-5 μm). These filters are prepared from alignment cells employing infrared transparent electrodes and substrates. The optical nature of the electrodes is shown to strongly influence the resulting transmission of the ban...