Domain wall theory and exchange stiffness in Co/Pd multilayers

The stripe model of domain structure in multilayers is studied by micromagnetic simulation. The results indicate a strong reduction of the effective domain wall energy (by dipolar effects). Domain width measurements on sputtered Co/Pd multilayers are compared with the theory. The estimated exchange stiffness is comparable with that of bulk Co. The effects of interface roughness and of interlayer exchange are discussed

Domain Structure of Co/Pd multilayers

The observations of submicron domain structure of Co/Pd multilayers at various parts of the M-H loop and after different magnetization cycles designed to approach the global-equilibrium domain width are reported. The wall energy densities were estimated from comparison of the measured equilibrium domain width with the anhysteretic model predictions and also compared with the wall energy densities determined from the slope of major M-H loo

Magnetism and Electronic Structure in ZnFe2_2O4_4 and MnFe2_2O4_4

Density functional calculations are used to study magnetic and electronic properties of the spinel ferrites, ZnFe$_2$O$_4$ and MnFe$_2$O$_4$. Correct magnetic orderings are obtained. ZnFe$_2$O$_4$ is predicted to be a small gap insulator in agreement with experiment. MnFe$_2$O$_4$ is found to be a low carrier density half-metal in the fully ordered state. However, strong effects on the electronic structure are found upon partial interchange of Fe and Mn atoms. This indicates that the insulating character may be due to Anderson localization associated with the intersite Mn-Fe disorder.Comment: 3 pages, submitted to mmm01 conferenc

Complement as an Endogenous Adjuvant for Dendritic Cell-Mediated Induction of Retrovirus-Specific CTLs

Previous studies have demonstrated the involvement of complement (C) in induction of efficient CTL responses against different viral infections, but the exact role of complement in this process has not been determined. We now show that C opsonization of retroviral particles enhances the ability of dendritic cells (DCs) to induce CTL responses both in vitro and in vivo. DCs exposed to C-opsonized HIV in vitro were able to stimulate CTLs to elicit antiviral activity significantly better than non-opsonized HIV. Furthermore, experiments using the Friend virus (FV) mouse model illustrated that the enhancing role of complement on DC-mediated CTL induction also occurred in vivo. Our results indicate that complement serves as natural adjuvant for DC-induced expansion and differentiation of specific CTLs against retroviruses

Library Training for Services to Minority Ethnic Groups: Concepts and General Principles

published or submitted for publicatio

An evaluation of Nicholas Rubakin's concept of bibliopschology in the light of current psychological research

The theory of bibliopsychology was developed by Nicholas Rubakin at the International Institute of Bibliopsychology in Switzerland in the years 1916-1946. It deals with the interaction. of the book and the reader and its methods can be applied to improving reader satisfaction in libraries. This thesis concentrates on the theoretical basis of bibliopsychology and on its method of quantitative investigation called the "special method". Other aspects of Rubakin's many sided activity, such as reading surveys, bibliographical works classification, literary activity are touched on only briefly. Part I. examines the main concepts of biblio- psychology ( communication, mnema, projection, type) in a historical as well as more recent perspective. Part II. deals with the "special method" of bibliopsychology. It covers investigations which either use similar methods or seek solutions to similar problems by different methods. Part III. discusses the acceptance and rejection of bibliopsychology by the scientific community and librarianship in Rubakin's native Russia and in the West. It also examines bibliopsychology in the light of scientific method. In the conclusion there is an interim assessment of bibliopsychology as it appear to us today, with some suggestions for further research. It seems that if the concepts used in the theory of bibliopsychology are re-interpreted in modern terms and then put together again a model of reading can be produced