Compact 20-kiloampere pulse-forming-network capacitor bank

Bank uses commercially available high-energy-density capacitors for energy storage and silicon-controlled rectifiers for switching. Low voltage design employing solid-state switching is utilized in lieu of conventional gas discharge switching

Correlation of transient spectra with performance in coaxial plasma guns

Two channel transient voltage digitizer for correlation of transient spectra with performance in coaxial, argon plasma gun

Gauge Theory in d=2+1 at High Temperature: Z_N interface

We calculate on the lattice the interface tension in the SU(2) pure gauge theory in d=2+1 at high temperature. The result is compared to the perturbative prediction. The agreement confirms applicability of the perturbation theory in this case.Comment: Lattice'94 contribution, 3pp, uuencoded compressed postscrip

Design of source coders and joint source/channel coders for noisy channels

A theory behind a proposed joint source/channel coding approach is developed and a variable rate design approach which provides substantial improvement over current joint source/channel coder designs is obtained. The Rice algorithm as applied to the output of the Gamma Ray Detector of the Mars Orbiter is evaluated. An alternative algorithm is obtained which outperforms the Rice both in terms of data compression and noisy channel performance. A high-fidelity low-rate image compression algorithm is developed which provides almost distortionless compression of high resolution images

Forward acoustic performance of a model turbofan designed for a high specific flow (QF-14)

Forward noise and overall aerodynamic performance are presented for a high-tip-speed fan having an exceptionally high average axial Mach number at the rotor inlet. This high Mach number is intended to attenuate forward noise at both the design-speed takeoff point, and at the unconventional low-pressure-ratio, design-speed approach point. As speed was increased near design, all forward noise components were reduced, and rear noise in the discharge duct was increased, indicating that the high Mach number flow at the rotor face is attenuating forward noise at takeoff. The fan at takeoff is some 5.5 to 11 dB quieter than several reference fans. Data at the point closest to approach indicated tentatively that the design-speed approach mode was 3 dB quieter than the conventional mode

Learning atmospheres: Re-imagining management education through the dérive

This article responds to the recent calls for rethinking management education, particularly to those that emphasize space, affect and atmosphere, and makes the case for the practice of dérive as a way of infusing management education with experiential, experimental and reflexive learning processes. The authors draw on ideas and practices of the art movement Situationist International who proposed the dérive, informed by the concept of psychogeography as a way of exploring and reimagining the atmospheres of everyday life. The paper is illustrated by the authors’ teaching experiences in this area (or space as one might say). The authors argue that the dérive in management education may foster future managers’ imaginative skills and inspire an imaginative self-reflection of the business school and its spatial organization. The paper concludes that in re-enacting their experience of educational space, participants may learn about, reflect on, and develop their affective capacities for becoming part of organizational processes, both as students of the business school and as future managers

An Agent-Based Modeling Approach to Spatial Accessibility

Place-based spatial accessibility represents the ability of populations within geographic units to access goods and services, and thus is an important indicator for sustainable development. Existing spatial accessibility models treat population as simply demand, calculating statistics or optimizing average cost for the population within each geographic unit, rather than modeling individual decisions. This paper proposes AgentAccess, a general-purpose Agent-Based Model (ABM) for spatial accessibility analysis. An ABM framework brings us closer to reality by simulating individual and imperfect decision-making. We introduce the model and compare its results against existing spatial accessibility models using a case study of hospital beds in Cook County, IL, USA

Psoriasis

This issue of eMedRef provides information to clinicians on the pathophysiology, diagnosis, and therapeutics of psoriasis