Simple applications of Noether's first theorem in quantum mechanics and electromagnetism

Internal global symmetries exist for the free non-relativistic Schr\"{o}dinger particle, whose associated Noether charges--the space integrals of the wavefunction and the wavefunction multiplied by the spatial coordinate--are exhibited. Analogous symmetries in classical electromagnetism are also demonstrated.Comment: 12 page

The Atlanta Housing Authority's Olympic Legacy Program: Public Housing Projects To Mixed Income Communities

This study seeks to assess the results of the Olympic Legacy Program of the Atlanta Housing Authority. It examines the policy changes by the Housing Authority that were designed to reduce the concentration of poor people living in the City of Atlanta. It is focused on the first three public housing projects that were changed to mixed-income communities

Exponential Conditional Volatility Models

The asymptotic distribution of maximum likelihood estimators is derived for a class of exponential generalized autoregressive conditional heteroskedasticity (EGARCH) models. The result carries over to models for duration and realised volatility that use an exponential link function. A key feature of the model formulation is that the dynamics are driven by the score

The Urban Superintendent: Creating Great Schools While Surviving on the Job

Captures the highlights of a colloquium of successful former superintendents of urban public schools. Offers some general guidance to help guide new superintendents as they accept the multiple challenges of overseeing a large urban school system

Death and the adorable orphan: Marcelino pan y vino (1954; 1991; 2000)

The Spanish journalist and writer José María Sánchez-Silva, unaware that he was adapting a folk tale about religious devotion rewarded, produced a complex narrative about the mother-son dyad: Marcelino pan y vino (1952). This was the basis of a popular Spanish film adaptation directed by Ladislao Vajda, released in 1954. It was then remade in 1991 as an Italian/Spanish/French co-production, directed by Luigi Comencini, and, recently, it has been translated into animation for television, the result of Spanish/Japanese/French collaboration in 2000. This article analyses how each version reveals shifting perceptions of childhood by focusing on the ideological function of the orphan child and the spectacle of the 'adorable boy'

Comparing and contrasting development and reproductive strategies in the pupal hyperparasitoids Lysibia nana and Gelis agilis (Hymenoptera: Ichneumonidae)

In most animals, the optimal phenotype is determined by trade-offs in life-history traits. Here, I compare development and reproductive strategies in two species of solitary secondary hyperparasitoids, Lysibia nana and Gelis agilis, attacking pre-pupae of their primary parasitoid host, Cotesia glomerata. Parasitoid larvae of both species exploit a given amount of host resources with similar efficiency. However, adults exhibit quite different reproductive strategies. Both species are synovigenic, and female wasps emerge with no mature eggs. However, G. agilis must first host-feed to produce eggs, while L. nana does not host-feed but mobilizes internal resources carried over from larval feeding to initiate oogenesis. Further, G. agilis is wingless, produces large eggs, has a long life-span, and generates only small numbers of progeny per day, whereas these traits are reversed in L. nana. Given unlimited hosts, the fecundity curve in L. nana was “front-loaded,” whereas in G. agilis it was depressed and extended over much of adult life. In L. nana (but not G. agilis), wasps provided with honey but no hosts lived significantly longer than wasps provided with both honey and hosts. Differences in the fecundity curves of the two hyperparasitoids are probably based on differing costs of reproduction between them, with the wingless G. agilis much more constrained in finding hosts than the winged L. nana. Importantly, L. nana is known to be a specialist hyperparasitoid of gregarious Cotesia species that pupate in exposed locations on the food plant, whereas Gelis sp. attack and develop in divergent hosts such as parasitoid cocoons, moth pupae and spider egg sacs. Consequently, there is a strong match between brood size in C. glomerata and egg production in L. nana, but a mismatch between these parameters in G. agilis.