The first measurements of Sr isotopic composition and concentration of archived stream water samples from the Hubbard Brook Experimental Forest in central New Hampshire were collected to evaluate long term trends. The presented data are for two watersheds, one of which was timber harvested in late 1983, and the other is a control watershed. Excess anion deposition, deforestation, and drought ar...

A surface diffusion coefficient is needed in room acoustics to enable the quality of diffusing surfaces to be evaluated. It may also facilitate more accurate geometric room acoustic models. This paper concentrates on diffusion coefficients derived from free-field polar responses. An extensive set of two- and three-dimensional measurements and predictions was used to test the worth of different ...

Reactive pathways to nucleation in a three-dimensional Ising model at 60% of the critical temperature are studied using transition path sampling of single spin flip Monte Carlo dynamics. Analysis of the transition state ensemble (TSE) indicates that the critical nuclei are rough and anisotropic. The TSE, projected onto the free energy surface characterized by cluster size, N, and surface area, ...

We have measured the fluorescence decay of I-hydroxypyrene-1,3,6-trisulfonate due to proton transfer to solvent in water-methanol mixtures. The data agree quantitatively with the reversible, diffusion-influenced proton-transfer mechanism in all solutions. No significant deviations from a short-time exponential decay or a long-time power law decay were found that could support a recently suggest...

A new methodology termed Single Amino Acid Mutation based change in Binding free Energy (SAAMBE) was developed to predict the changes of the binding free energy caused by mutations. The method utilizes 3D structures of the corresponding protein-protein complexes and takes advantage of both approaches: sequence- and structure-based methods. The method has two components: a MM/PBSA-based componen...

The influence of surface reconstruction on diffusion of adsorbed particles is investigated in the framework of simple two-position symmetrical model. Exact expressions for the free energy and diffusion coefficient are obtained neglecting the lateral interaction between the adsorbed particles. The critical behavior of the system is described by an anisotropic Ising spin model. The coverage depen...

Atmospheric rainfall is one of the major sources water and nutrient inputs in forest stands. Understanding atmospheric partitioning hydrochemical fluxes stands critical for management monitoring regional pollution, especially high N deposition regions. In this study, annual collections were implemented to investigate partitioning, element concentrations, an evergreen coniferous (ECF) stand, a d...