Future Prospects: Deep Imaging of Galaxy Outskirts using Telescopes Large and Small

The Universe is almost totally unexplored at low surface brightness levels. In spite of great progress in the construction of large telescopes and improvements in the sensitivity of detectors, the limiting surface brightness of imaging observations has remained static for about forty years. Recent technical advances have at last begun to erode the barriers preventing progress. In this Chapter we describe the technical challenges to low surface brightness imaging, describe some solutions, and highlight some relevant observations that have been undertaken recently with both large and small telescopes. Our main focus will be on discoveries made with the Dragonfly Telephoto Array (Dragonfly), which is a new telescope concept designed to probe the Universe down to hitherto unprecedented low surface brightness levels. We conclude by arguing that these discoveries are probably only scratching the surface of interesting phenomena that are observable when the Universe is explored at low surface brightness levels.Comment: 27 pages, 10 figures, Invited review, Book chapter in "Outskirts of Galaxies", Eds. J. H. Knapen, J. C. Lee and A. Gil de Paz, Astrophysics and Space Science Library, Springer, in pres

Efficient Algorithms for Universal Quantum Simulation

A universal quantum simulator would enable efficient simulation of quantum dynamics by implementing quantum-simulation algorithms on a quantum computer. Specifically the quantum simulator would efficiently generate qubit-string states that closely approximate physical states obtained from a broad class of dynamical evolutions. I provide an overview of theoretical research into universal quantum simulators and the strategies for minimizing computational space and time costs. Applications to simulating many-body quantum simulation and solving linear equations are discussed

Invariant Differential Operators for Non-Compact Lie Groups: the Sp(n,R) Case

In the present paper we continue the project of systematic construction of invariant differential operators on the example of the non-compact algebras sp(n,R), in detail for n=6. Our choice of these algebras is motivated by the fact that they belong to a narrow class of algebras, which we call 'conformal Lie algebras', which have very similar properties to the conformal algebras of Minkowski space-time. We give the main multiplets and the main reduced multiplets of indecomposable elementary representations for n=6, including the necessary data for all relevant invariant differential operators. In fact, this gives by reduction also the cases for n<6, since the main multiplet for fixed n coincides with one reduced case for n+1.Comment: Latex2e, 27 pages, 8 figures. arXiv admin note: substantial text overlap with arXiv:0812.2690, arXiv:0812.265

"Big Boys Don’t Cry!" Or Do They? : Can Forensic Patients Change?

Inauguratie prof. dr. Bernstein, benoemd in de Faculty of Psychology and Neuroscience tot bijzonder hoogleraar Forensische Psychotherapi

Kappa-symmetry for coincident D-branes

A kappa-symmetric action for coincident D-branes is presented. It is valid in the approximation that the additional fermionic variables, used to incorporate the non-abelian degrees of freedom, are treated classically. The action is written as a Bernstein-Leites integral on the supermanifold obtained from the bosonic worldvolume by adjoining the extra fermions. The integrand is a very simple extension of the usual Green-Schwarz action for a single brane; all symmetries, except for kappa, are manifest, and the proof of kappa-symmetry is very similar to the abelian case.Comment: 18 pages. References adde

A Schema Therapy Based Milieu in Secure Residential Youth Care:Effects on Aggression, Group Climate, Repressive Staff Interventions, and Team Functioning

Group care workers of residential youth care settings face the challenge of creating a warm and involved treatment climate against the demands and restrictions of the treatment setting. We tested the effects of SafePath, a milieu-based intervention based on Schema Therapy principles, during the first year of implementation on two secure residential treatment units compared to two control units. Staff’s daily reports on 139 individual patients were coded on use of schema mode language (implementation check), occurrences of aggression (primary outcome) and repressive staff interventions. In addition, repeated questionnaires were filled out by patients (n = 87) on group climate and by staff (n = 50) on team functioning. Compared to the control units, SafePath units showed higher improvements in group climate and repressive interventions. Both SafePath and control units showed decreased aggression over time. Team functioning was consistently better in the SafePath units compared to the care-as-usual units from baseline through 12 months. In conclusion, a Schema Therapy based milieu as implemented with SafePath may contribute to a warm and supportive group climate with less repressive interventions in secure residential youth care