Fractal Spectrum of a Quasi_periodically Driven Spin System

We numerically perform a spectral analysis of a quasi-periodically driven spin 1/2 system, the spectrum of which is Singular Continuous. We compute fractal dimensions of spectral measures and discuss their connections with the time behaviour of various dynamical quantities, such as the moments of the distribution of the wave packet. Our data suggest a close similarity between the information dimension of the spectrum and the exponent ruling the algebraic growth of the 'entropic width' of wavepackets.Comment: 17 pages, RevTex, 5 figs. available on request from [email protected]

Design for waste-management system

Study was made and system defined for water-recovery and solid-waste processing for low-rise apartment complexes. System can be modified to conform with unique requirements of community, including hydrology, geology, and climate. Reclamation is accomplished by treatment process that features reverse-osmosis membranes

Study of water recovery and solid waste processing for aerospace and domestic applications. Volume 2: Final report

The manner in which current and advanced technology can be applied to develop practical solutions to existing and emerging water supply and waste disposal problems is evaluated. An overview of water resource factors as they affect new community planning, and requirements imposed on residential waste treatment systems are presented. The results of equipment surveys contain information describing: commercially available devices and appliances designed to conserve water; devices and techniques for monitoring water quality and controlling back contamination; and advanced water and waste processing equipment. System concepts are developed and compared on the basis of current and projected costs. Economic evaluations are based on community populations of from 2,000 to 250,000. The most promising system concept is defined in sufficient depth to initiate detailed design

Exploring the Developmental Outcomes of First-Year Experience Seminars (in-progress)

A substantial amount of research shows that the first year of college is a “make or break” time for most students, with an estimated 60% of incoming students withdrawing before the beginning of their sophomore year (Pascarella & Terenzini, 2005). Additional research also shows that 2/3 of students’ gains in cognitive and intellectual skill occur during their first year (Pascarella and Terenzini, 2005). Finding like this have led to the nearly universal use of First Year Experience (FYE) Seminars

Chaos from turbulence: stochastic-chaotic equilibrium in turbulent convection at high Rayleigh numbers

It is shown that correlation function of the mean wind velocity generated by a turbulent thermal convection (Rayleigh number $Ra \sim 10^{11}$) exhibits exponential decay with a very long correlation time, while corresponding largest Lyapunov exponent is certainly positive. These results together with the reconstructed phase portrait indicate presence of chaotic component in the examined mean wind. Telegraph approximation is also used to study relative contribution of the chaotic and stochastic components to the mean wind fluctuations and an equilibrium between these components has been studied in detail

A School That Teaches Humane Methods of Euthanasia

Since 1985, Iowa State University College of Veterinary Medicine has offered a unique school to animal shelter personnel, animal health technicians, administrators, police officers, veterinarians, and veterinary students. This unique school is a course in... euthanasia. ISU has become the leader in euthanasia instruction for animal shelters. In fact, Iowa State is one of only a few veterinary schools to offer this much needed program

Spectrum and diffusion for a class of tight-binding models on hypercubes

We propose a class of exactly solvable anisotropic tight-binding models on an infinite-dimensional hypercube. The energy spectrum is analytically computed and is shown to be fractal and/or absolutely continuous according to the value hopping parameters. In both cases, the spectral and diffusion exponents are derived. The main result is that, even if the spectrum is absolutely continuous, the diffusion exponent for the wave packet may be anything between 0 and 1 depending upon the class of models.Comment: 5 pages Late

When to Neuter: The Controversy

In this day of pet overpopulation, many alternatives are being sought to control the reproduction of domestic canines and felines. One alternative discussed often is that of early spaying and early castration. Early, in this case, is any time before the usually suggested six to eight months (before the first heat cycle in the females). In the summer of 1993 in Minneapolis, the AVMA voted to endorse the concept of early-age spaying/ neutering. The topic of early spay/neuter always brings up the possible problems associated with this practice. Safe anesthesia in these juvenile patients is always a big concern, as is ease or ability to do the actual surgery. These concerns in kittens will be discussed in the following paragraphs. For the purpose of this discussion, a small, semi-scientific study was done