Theoretical and experimental determination of cell constants of planar-interdigitated electrolyte conductivity sensors

In this paper, an analytical expression is presented for the cell constant of planar-interdigitated electrodes used as electrolyte conductivity sensors. The result of this expression is compared with results of measurement carried out with several differently shaped planar probes provided with a thin Ta2O5 insulating film, showing good agreement. More than 10 different devices have been fabricated with predicted cell constants ranging from 0.14 to 4.44 cm¿1. The measured cell constants are typically 10¿20% smaller, possibly due to fringing effects

The influence of demagnetization on the magnetic after-effect of Co-Cr micro structures

The influence of the demagnetization field on the magnetic after-effect of Co-Cr media is discussed. The demagnetizing field of as-sputtered Co-Cr was changed into block-shaped micro structures by lithographic processes. This process does affect the shearing of the perpendicular hysteresis curve but not the intrinsic magnetic properties. A linear relation was obtained between the coefficient of magnetic viscosity and the slope of the hysteresis curv

Mothers Grimm and Other House Held Tales

Mothers Grimm and Other House Held Tales is a body of work that uses fairy tale archetypes and narrative traditions to comment upon tensions and conflicts in sexual self-understanding. This is achieved through a reflection on attitudes that women adopt regarding their own sexuality. Such a reflection is instigated through a presentation of prominent cultural archetypes that exist, no longer as received ideas, but as a bold and entertaining expression of how sex can change our attitude towards those ideas that we often take for granted. Through an assemblage of objects and video, this body of work evokes a domestic setting through the re-creation of the household environment. The viewer is drawn in by fun looking characterizations that, upon first glance, arouses a sense of archetypal nostalgia. However, a closer investigation reveals sardonic humor and associative metaphors that refer to sexual themes, some situated in dark places

THE UNIVERSITY BELL: A RESEARCH INTO TRADITIONAL METHODS OF BELL FOUNDING

poster abstractBell manufacturing companies no longer exist in the United States that utilize traditional craft procedures or are able to tune bells to standards based on ‘true-harmonic’ formula. Most bells in the United States used in the many forms of Campanology, or bell ringing, are imported from European foundries. These European bells are made using sensibilities that have exist-ed for over 800 years. The few remaining foundries, John Taylor and Co. in England, Paccard of France, Petit Fritsen and The Royal Eijsbouts Bell Found-ry located in The Netherlands, all provided the opportunity to conduct inten-sive study into the craft of bell making. By incorporating these craft tradi-tions into a contemporary fine art practice, viewers and listeners are able to access an otherwise obsolete aspect of the history of our material culture. Following closely in the theory and manufacturing procedures of these European founders, a bell of 110 lbs. titled The University Bell was cast at the Herron School of Art and Design’s foundry. The metal for the project was sourced from a redundant bell of St. Michael’s Parish Church Cornhill, Lon-don that was originally made in 1728 by Thomas Lester, one of the original founders of our 1752 Liberty Bell. The University Bell is currently in the earliest stages of being tuned in Mooresville, Indiana for a final nominal tone of C#3 at A=440Hz. Assistance from Smith’s Bell and Clock Service Inc., Bell Expert Richard Strauss, and John Taylor and Co. are contributing to the effort. The University Bell will later be installed in a series of sight specific performances. The successful cast of The University Bell and the continuing efforts to oversee the professional creation of tuned bells in this country marks the re-turn of a historic trade whose product has long resounded the democratic overtones of liberty and freedom. Funding provided by the Indiana University-Purdue University Indianapolis Undergraduate Research Opportunities Program (UROP)

Experimental and theoretical study of light scattering by individual mature red blood cells by use of scanning flow cytometry and discrete dipole approximation

Elastic light scattering by mature red blood cells (RBCs) was theoretically and experimentally analyzed with the discrete dipole approximation (DDA) and the scanning flow cytometry (SFC), respectively. SFC permits measurement of angular dependence of light-scattering intensity (indicatrix) of single particles. A mature RBC is modeled as a biconcave disk in DDA simulations of light scattering. We have studied the effect of RBC orientation related to the direction of the incident light upon the indicatrix. Numerical calculations of indicatrices for several aspect ratios and volumes of RBC have been carried out. Comparison of the simulated indicatrices and indicatrices measured by SFC showed good agreement, validating the biconcave disk model for a mature RBC. We simulated the light-scattering output signals from the SFC with the DDA for RBCs modeled as a disk-sphere and as an oblate spheroid. The biconcave disk, the disk-sphere, and the oblate spheroid models have been compared for two orientations, i.e. face-on and rim-on incidence. Only the oblate spheroid model for rim-on incidence gives results similar to the rigorous biconcave disk model.Comment: 13 pages, 9 figure