SgpDec : Cascade (de)compositions of finite transformation semigroups and permutation groups

We describe how the SgpDec computer algebra package can be used for composing and decomposing permutation groups and transformation semigroups hierarchically by directly constructing substructures of wreath products, the so called cascade products.Final Accepted Versio

Development of reliability methodology for systems engineering. Volume I - Methodology - Analysis techniques and procedures Final report

Reliability analyses for equipment in design stag

Summary of Discussions from the workshop at Seanbur's Seminar Oct. 1998 with the topic “Positive and Negative Effects of Enrichment Elements in Cages for Small Rodents”

No abstract availabl

Weighing used for the automatic registration of preferences when testing rats

The preference test is one of the only behavioural test, which gives the animal an opportunity to make a free choice or indicate what it prefers and, therefore, it is widely used to evaluate whether an animal prefers one set-up to another. Providingwhat the experimental animal prefers (eg grids) will reduce stress, good for both experimental reliability and animal welfare.In the present study the rat’s preference for different cages was registered and recorded by digital weights This study showed that this relatively simple set-up was applicable for registration of the preferences for different housing conditions, such as bedding or grid

TB157: Capture, Care, and Handling of Fishers (Martes pennanti)

These authors brought fishers into captivity to assess the reproductive cycles of both sexes and to monitor females with known reproductive histories. In addition, kits born in captivity were raised to sexual maturity to monitor growth and development. Here they report on the rates at which fishers were caught, the care and maintenance of fishers while in captivity, and the handling procedures used with 44 fishers taken from the wild and 38 fishers conceived in the wild and born in captivity, during the period from 1990 to 1993.https://digitalcommons.library.umaine.edu/aes_techbulletin/1057/thumbnail.jp

The application of traditional behavioural and physiological methods for monitoring of the welfare impact of different flooring conditions in rodents

In this study, observations on traditional methods, such as open field test, conicosterone assays and monitoring of barbiturate sleeping time, were performed to validate the impact of housing conditions on the welfare of rats and mice in orderto compare the outcome with observations previously achieved by preference tests and telemetry. These traditional methods failed to demonstrate the impact on the animals caused by grid housing previously shown by telemetry and preference studies, and it is, therefore, concluded that these traditional tests may be less sensitive for monitoring Subtle small environmental impacts on laboratory rodents.Although. the methods were not able to reveal any differences in eortieosterone level and open field test between housing conditions, there were significant differences between mouse strains and sexes. These differences between strains should betaken i nto account when choosing the best suitable strain for a study

Quantum electrodynamics of relativistic bound states with cutoffs

We consider an Hamiltonian with ultraviolet and infrared cutoffs, describing the interaction of relativistic electrons and positrons in the Coulomb potential with photons in Coulomb gauge. The interaction includes both interaction of the current density with transversal photons and the Coulomb interaction of charge density with itself. We prove that the Hamiltonian is self-adjoint and has a ground state for sufficiently small coupling constants.Comment: To appear in "Journal of Hyperbolic Differential Equation

Cesarean Delivery in Women With Genital Herpes in Washington State, 1989–1991

Objective: The purpose of this study was to determine whether the proportion of cesarean deliveries in pregnant women with a history of genital herpes and no active lesions at birth is higher than that in women with no history of genital herpes, and to determine whether this risk was modified by birth facilities' underlying prevalence of cesarean delivery