Silver-Zinc Battery Separator Material Development

Ethylene/acrylic acid separators for silver zinc battery application

Inlet spillage drag tests and numerical flow-field analysis at subsonic and transonic speeds of a 1/8-scale, two-dimensional, external-compression, variable-geometry, supersonic inlet configuration

Accurate spillage drag and pressure data are presented for a realistic supersonic inlet configuration. Results are compared with predictions from a finite-differencing, inviscid analysis computer procedure. The analytical technique shows good promise for the evaluation of inlet drag, but necessary refinements were identified. A detailed description of the analytical procedure is contained in the Appendix

Mapping Changes to the Songs in The Gentle Shepherd, 1725-1788

Examines the varying ways in which the songs in Allan Ramsay\u27s ballad-opera The Gentle Shepherd were published between the 170s and the 1780s, noting variation in how particular songs were titled, in which songs were included and how they were placed within the dramatic text, in which tunes were used for which song-texts, and in how words were related to music in editions providing both. The discussion is supported by extensive tables and lists of 18th century Ramsay editions, and illustrated with transcriptions of the music in two editions. Concludes that the addition of the music in later editions served over time to stabilize the placement of the songs within the dramatic text.

Performance potential of Stationers’ Hall collections

No abstract available

Effects of soil management on denitrification

Non-Peer Reviewe

Motherboards, Microphones and Metaphors: Re-examining New Literacies and Black Feminist Thought through Technologies of Self

ABSTRACT This article examines how two African American females composed counter-selves using a computer motherboard and a stand-alone microphone as critical identity texts. Situated within sociocultural and critical traditions in new literacy studies and black feminist thought, the authors extend conceptions of language, literacy and black femininity via the agentic, powerful and knowledgeable selves of African American women, constructs that are often missing from the scholarship on young African American women and their practices of self-definition. The motherboard and microphone serve as analytical constructs for understanding critical new literacies and subject malleability, which crisscrosses in complex configurations across the experiences, histories and relationships that carry meaning for those who struggle through scenes of silence. Motherboards and microphones act metaphorically as technologies of the self, which resist and reformat cosmologies of black femininity that have long patterned gender oppression. The findings suggest that technologies exist everywhere, and technology related to literacy and language exists in many forms, including vocabularies of motherboards and microphones. The authors conclude that using such vocabularies for expressing identity can work through the power of metaphor in its richest sense to offer new conceptions of self, whereby the subject becomes a personal artifact capable of immense transformative potential. The things we call ‘technologies’ are ways of building order in our world. Many technological devices and systems important in everyday life contain possibilities for many different ways of ordering human activity. (Matlow, 2000, p. 167

Local boron doping quantification in homoepitaxial diamond structures

The capability of transmission electronmicroscopy (TEM) using the high angle annular dark fieldmode (HAADF,also labelled Z-contrast) to quantify boron concentration, in the high doping range between 1019cm−3 and 1021cm−3, is demonstrated. Thanks to the large relative variation of atomic number Z between carbon and boron, doping concentration maps and profiles are obtained with a nanometer-scale resolution. A novel numerical simulation procedure allows the boron concentration quantification and demonstrates the high sensitivity and spatial resolution of the technique.4 page

Level Curve Concept for Facility Planning Using the Apple II Graphics Tablet

The purpose of this effort is to demonstrate the feasibility of using a low cost microcomputer graphics system to assist the practicing engineer in solving facility planning problems. In many cases the lower resolution of the microcomputer system may be adequate and a better choice than a more expensive system. A demonstration microcomputer graphics system was developed using the Apple II Plus computer and an Apple Graphics Tablet. The facility planning problem chosen was single-facility location using the level curve concept in the rectilinear movement case. Two separate programs were written. The first was used to define the layout of a facility for the computer and the second to draw the level curves

Spatial Distribution of Competing Ions around DNA in Solution

The competition of monovalent and divalent cations for proximity to negatively charged DNA is of biological importance and can provide strong constraints for theoretical treatments of polyelectrolytes. Resonant x-ray scattering experiments have allowed us to monitor the number and distribution of each cation in a mixed ion cloud around DNA. These measurements provide experimental evidence to support a general theoretical prediction: the normalized distribution of each ion around polyelectrolytes remains constant when ions are mixed at different ratios. In addition, the amplitudes of the scattering signals throughout the competition provide a measurement of the surface concentration parameter that predicts the competition behavior of these cations. The data suggest that ion size needs to be taken into account in applying Poisson-Boltzmann treatments to polyelectrolytes such as DNA