Under many different conditions activated plasma membrane ion channels give rise to changes in the extracellular concentration of the permeant ion(s). The magnitude and duration of these changes are dependent on the electrochemical driving force(s) on the permeant ion(s) as well as conductance, open time, and channel density. We have modeled the change in the extracellular [K+] due to efflux th...

We find p-brane solutions to the recently proposed IKKT IIB matrix theory for all odd p. We also propose central charges for the p-branes. NBI-HE-97-02 January, 1997

[1] We use narrowband images of Titan obtained in November 1999 to explore the haze vertical structure in Titan’s lower atmosphere. The images were taken with the MountWilson 2.54m telescope using the NASA/GSFC-built Acousto-Optic Imaging Spectrometer. These images were recorded at five wavelengths surrounding the 0.94 mm methane window and are sensitive to a range of altitudes in Titan’s lower...

We show that constraints on the generating functional have direct BRST-extensions in terms of nilpotent operators ∆ that annihilate this generating functional, and which may be of arbitrarily high order. The free energy F in the presence of external sources thus satisfies a “Master Equation” which is described in terms of a tower of higher antibrackets. UUITP-23/96 NBI-HE-96-52 hep-th/9610083

To gain insight into the non-abelian Born-Infeld (NBI) action, we study coinciding D-branes wrapped on tori, and turn on magnetic fields on their worldvolume. We then compare predictions for the spectrum of open strings stretching between these D-branes, from perturbative string theory and from the effective NBI action. Under some plausible assumptions, we find corrections to the Str-prescripti...