Gentrification: The Class Conflict over Urban Space Moves into the Courts

Gentrification of inner-cities has resulted in a class conflict over urban space. An issue in the federal courts is whether the Department of Housing and Urban Development (HUD) can build, sponsor, or subsidize low income housing projects within or near revitalized neighborhoods. In Stryker\u27s Bay Neighborhood Council v. Karlen, the United States Supreme Court held that HUD\u27s decision-making process relating to the placement of low income housing is beyond judicial review. This Article reviews recent litigation in Philadelphia, Chicago and Boston in light of Stryker\u27s Bay, and concludes that in order to protect federal efforts to maintain the integrated character of inner-city neighborhoods, HUD must amend its regulations to deal with the reality of gentrification. HUD should define gentrified areas and recognize that such areas are ideal for integrated housing, so that the federal courts do not have to step in, resulting in delay

Gentrification: The Class Conflict over Urban Space Moves into the Courts

Gentrification of inner-cities has resulted in a class conflict over urban space. An issue in the federal courts is whether the Department of Housing and Urban Development (HUD) can build, sponsor, or subsidize low income housing projects within or near revitalized neighborhoods. In Stryker\u27s Bay Neighborhood Council v. Karlen, the United States Supreme Court held that HUD\u27s decision-making process relating to the placement of low income housing is beyond judicial review. This Article reviews recent litigation in Philadelphia, Chicago and Boston in light of Stryker\u27s Bay, and concludes that in order to protect federal efforts to maintain the integrated character of inner-city neighborhoods, HUD must amend its regulations to deal with the reality of gentrification. HUD should define gentrified areas and recognize that such areas are ideal for integrated housing, so that the federal courts do not have to step in, resulting in delay

Space-age Europe, 1957-1980

European space related research and development from the launch of Sputnik in 1957 to 1980 in discussed. The political response to Sputnik is analyzed in the context of cold war. The development of the European Space Agency is traced

The algebra of rewriting for presentations of inverse monoids

We describe a formalism, using groupoids, for the study of rewriting for presentations of inverse monoids, that is based on the Squier complex construction for monoid presentations. We introduce the class of pseudoregular groupoids, an example of which now arises as the fundamental groupoid of our version of the Squier complex. A further key ingredient is the factorisation of the presentation map from a free inverse monoid as the composition of an idempotent pure map and an idempotent separating map. The relation module of a presentation is then defined as the abelianised kernel of this idempotent separating map. We then use the properties of idempotent separating maps to derive a free presentation of the relation module. The construction of its kernel - the module of identities - uses further facts about pseudoregular groupoids.Comment: 22 page

Dynamic confidence during simulated clinical tasks

Objective: Doctors' confidence in their actions is important for clinical performance. While static confidence has been widely studied, no study has examined how confidence changes dynamically during clinical tasks. Method: The confidence of novice (n = 10) and experienced (n = 10) trainee anaesthetists was measured during two simulated anaesthetic crises, bradycardia (easy task) and failure to ventilate (difficult task). Results: As expected, confidence was high in the novice and experienced groups in the easy task. What was surprising, however, was that confidence during the difficult task decreased for both groups, despite appropriate performance. Conclusions: Given that confidence affects performance, it is alarming that doctors who may be acting unsupervised should lose dynamic confidence so quickly. Training is needed to ensure that confidence does not decrease inappropriately during a correctly performed procedure. Whether time on task interacts with incorrect performance to produce further deficits in confidence should now be investigated

MHD mode conversion in a stratified atmosphere

Mode conversion in the region where the sound and Alfven speeds are equal is a complex process, which has been studied both analytically and numerically, and has been seen in observations. In order to further the understanding of this process we set up a simple, one-dimensional model, and examine wave propagation through this system using a combination of analytical and numerical techniques. Simulations are carried out in a gravitationally stratified atmosphere with a uniform, vertical magnetic field for both isothermal and non-isothermal cases. For the non-isothermal case a temperature profile is chosen to mimic the steep temperature gradient encountered at the transition region. In all simulations, a slow wave is driven on the upper boundary, thus propagating down from low-beta to high-beta plasma across the mode-conversion region. In addition, a detailed analytical study is carried out where we predict the amplitude and phase of the transmitted and converted components of the incident wave as it passes through the mode-conversion region. A comparison of these analytical predictions with the numerical results shows good agreement, giving us confidence in both techniques. This knowledge may be used to help determine wave types observed and give insight into which modes may be involved in coronal heating.Comment: 7 pages, 5 figure

MHD Mode Conversion around a 2D Magnetic Null Point

Mode conversion occurs when a wave passes through a region where the sound and Alfven speeds are equal. At this point there is a resonance, which allows some of the incident wave to be converted into a different mode. We study this phenomenon in the vicinity of a two-dimensional, coronal null point. As a wave approaches the null it passes from low- to high-beta plasma, allowing conversion to take place. We simulate this numerically by sending in a slow magnetoacoustic wave from the upper boundary; as this passes through the conversion layer a fast wave can clearly be seen propagating ahead. Numerical simulations combined with an analytical WKB investigation allow us to determine and track both the incident and converted waves throughout the domain.Comment: 4 pages, 2 figure