Bose-Einstein condensation in the presence of an impurity

It is shown that Bose-Einstein condensation occurs for an ideal gas in two spatial dimensions in the presence of one impurity which is described quantum mechanically in terms of a point-like vortex and a contact interaction. This model is exactly solvable and embodies as a special case the analogous problem in three spatial dimensions.Comment: 6 pages, LaTeX, no figures. Misprints correcte

Advances in high energy astronomy from space

Observational techniques, derived through space technology, and examples of what can be learned from X-ray observations of a few astronomical objects are given. Astronomical phenomena observed include the sun, stellar objects, and galactic objects

A high energy astronomy overview

A technology assessment of extrasolar X-ray astronomy is presented. The role and significance of the Einstein Observatory is described

X-ray reflection collimator adapted to focus X-radiation directly on a detector Patent

X ray collimating structure for focusing radiation directly onto detecto

Axial Anomaly in the Presence of the Aharonov-Bohm Gauge Field

We investigate on the plane the axial anomaly for euclidean Dirac fermions in the presence of a background Aharonov--Bohm gauge potential. The non perturbative analysis depends on the self--adjoint extensions of the Dirac operator and the result is shown to be influenced by the actual way of understanding the local axial current. The role of the quantum mechanical parameters involved in the expression for the axial anomaly is discussed. A derivation of the effective action by means of the stereographic projection is also considered.Comment: 15 pages, Plain.TeX, Preprint DFUB/94 - 1

Body genres, embodiment and engagement: Second Person in Audio Storytelling

In the article, “Film Bodies: Gender, Genre and Excess” (1991), Linda Williams defines as body genres the film genres that are based on stimulating certain physical reactions in the bodies of spectators. These are fear (horror), sexual arousal (pornography), and tears (melodrama). All three genres share, “an apparent lack of proper aesthetic distance, a sense of over-involvement in sensation and emotion. We feel manipulated,” by them. The bodies of whoever watches these films are involved in an “involuntary mimicry” of the body on the screen. During a talk at the 2016 Third Coast Conference, radio producer Eleanor McDowall inquired about the equivalent of body genres in audio storytelling (radio, podcast, and other forms of audio narratives). What are those sound works that engage the bodies of their listeners, not by merely talking about bodily reactions, but by actually provoking them