A dynamic systems modeling approach is being developed for assessing the sustainability of an industrial sector. Assessing systems sustainability is a complex undertaking and entails the synthesis of large quantities of information from different sources. In this approach, those environmental performance measures relevant to the industrial sector in question are first identified. Then a systems...

The sandy sediments that blanket the inner shelf are situated in a zone where nutrient input from land and strong mixing produce maximum primary production and tight coupling between water column and sedimentary processes. The high permeability of the shelf sands renders them susceptible to pressure gradients generated by hydrodynamic and biological forces that modulate spatial and temporal pat...

Sound-producing sand grains constitute one of nature’ s more puzzling and least understood physical phenomena. They occur naturally in two distinct types: booming and squeaking sands. Although both varieties of sand produce unexpectedly pure acoustic emissions when sheared, they diŒer in their frequency range and duration of emission, as well as the environment in which they tend to be found. L...

M. Holtzer, B. Grabowska, S. Żymankowska-kumon, D. Kwaśniew skakrólikowska, R. Dańko, W. Solarski, A. Bobrowski, AGH University of Science and Technology, Faculty of Foundry Engineering, Kraków, Poland Procedures have been developed to determine the volume, rate and composition (particularly BTEX: benzene, toluene, ethylbenzene and xylenes and PAHs (polycyclic aromatic hydrocarbons)) of gas evo...

We have studied the induced polarization (IP) response of multiphase porous systems by conducting complex resistivity (CR) frequency-domain IP measurements for sands and sandstones samples containing salt water in pores and those whose unsaturated pores were filled with synthetic oil. The results of our study show that the oil saturated sands and sandstone samples are characterized by a signifi...

The 1 H nuclear magnetic resonance (NMR) spin-lattice relaxation rate of hydrated sands is related to the surface-to-volume ratio of the voids or pores between the hydrated sand grains and the surface relaxivity of the grains. The electron spin resonance (ESR) signal is often used to predict the relative surface relaxivity as the surface relaxivity is thought to be proportional to the concentra...

K. Kaczmarska, B. Grabowska, D. Drożyński, AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland The results of preliminary tests of selected properties of the moulding sands with the binder in the form of a 5 % water solution of the sodium salt of carboxymethyl starch (with a degree of substitution (DS) of 0,2 and 0,87) are presented in this study. The mouldi...

The paper is concerned with the modelling of the heterogeneous and highly stratified Venetian sediment behaviour within a theoretical framework known as Generalized Plasticity. Starting from an existing formulation developed for sands, modifications are introduced into the constitutive equations in order to overcome some limitations of the original model and to develop a simple and reliable pro...

The evolution of intersexual interactions, like mate choice, during ecological speciation has received widespread attention. However, changes in intrasexual interactions, like male territoriality, during ecological divergence are largely unexamined. We conducted field experiments with adaptively diverged populations of the eastern fence lizard (Sceloporus undulatus) to determine whether territo...

High-performance GaAs metal-insulator-semiconductor field-effect-transistors MISFETs fabricated with very thin self-assembled organic nanodielectrics (SANDs), deposited from solution at room temperature, are demonstrated. A submicron gate-length depletion-mode n-channel GaAs MISFET with SAND thicknesses ranging from 5.5 to 16.5 nm exhibit a gate leakage current density 10−5 A/cm2 at a gate bias...