Jet Results in pp and Pb-Pb Collisions at ALICE

We report results on jet production in pp and Pb-Pb collisions at the LHC from the ALICE collaboration. The jet cross section in pp collisions at $\sqrt{s}$=2.76 TeV is presented, as well as the charged particle jet production cross section and measurements of the jet fragmentation and jet shape in pp collisions at $\sqrt{s}$=7 TeV. NLO pQCD calculations and simulations from MC event generators agree well with the data. Measurements of jets with a resolution parameter $R$=0.2 in Pb-Pb collisions at $\sqrt{s}_{NN}$=2.76 TeV show a strong, momentum dependent suppression in central events with respect to pp collisions. The centrality dependence of the suppression of charged particle jets relative to peripheral events is presented. The ratio of jet spectra with $R$=0.2 and $R$=0.3 is found to be similar in pp and Pb-Pb events. The analysis of the semi-inclusive distribution of charged particle jets recoiling from a high-$p_{\rm T}$ trigger hadron allows an unbiased measurement of the jet structure for larger cone radii.Comment: 4 pages, 3 figures, to appear in the proceedings of the 48th Rencontres de Moriond, La Thuile, Italy, March 9-16, 201

When Have All the Graduates Gone?: Internal Cross-State Migration of Graduates in Germany 1984-2004

The present paper analyzes the out-migration of graduates to other German states or abroad based on the German Socio-Economic Panel (GSOEP). Applying duration analysis, it can be shown that, ten years after graduation, slightly more than seventy percent of the graduates still live in the state where they completed their studies. The parametric estimation model identifies personal characteristics that are highly correlated with out-migration and permanent residence respectively. The analysis confirms previous results that nonresident students exhibit a significantly higher emigration propensity than resident fellows.Brain drain, nonresident students, fiscal externalities, duration analysis, GSOEP

Wie groß ist der Brain Drain innerhalb von Deutschland?

Der innerdeutsche Brain Drain, also die Abwanderung von Akademikern in andere Bundesländer, nimmt bisher ein moderates Ausmaß an. Zehn Jahre nach Studienabschluss sind noch knapp über 70 % aller Absolventen im Bundesland ihres Studiums ansässig. Die Daten zeigen ferner, dass ein Wegzug, wenn er überhaupt stattfindet, in den ersten Jahren direkt nach Studienabschluss vollzogen wird. Je länger ein Absolvent bereits vor Ort verblieben ist, umso geringer ist die Wahrscheinlichkeit für einen späteren Wegzug. Speziell für Ostdeutschland besteht Anlass zu verhaltenem Optimismus. Die ostdeutschen Bundesländer erweisen sich als attraktive Studienorte, die talentierte junge Menschen von außerhalb anziehen. Wenn es gelingt, diese zukünftigen Absolventen auch im Lande zu halten, kann dies das Humankapital vor Ort und damit das Wirtschaftswachstum erhöhen.Humankapital; Brain Drain; Wissenstransfer; Wirtschaftswachstum; Deutschland; Neue Bundesländer

A Study of an Intra-Organizational Stratification System Viewed as a Network of Social Distance Strategies about a Set of Fixed Positions

It is generally agreed that in a generic sense the concept social stratification refers to a structure of differential rankings which seems to occur in all societies. That is a structure exists of regularized inequality in which men are ranked higher and lower according to the value accorded their various social roles and activities through the process of self-and-other differentiation and ranking

Orbital Hall effect and orbital edge states caused by s electrons

An orbital current can be generated whenever an object has a translational and rotational degree of freedom. In condensed matter physics, intra-atomic contributions to the transverse orbital transport, labeled orbital Hall effect, rely on propagating wave packets that must consist of hybridized atomic orbitals. However, inter-atomic contributions have to be considered as well because they give rise to a new mechanism for generating orbital currents. As we show, even wave packets consisting purely of s electrons can transport orbital angular momentum if they move on a cycloid trajectory. We introduce the kagome lattice with a single s orbital per atom as the minimal model for the orbital Hall effect and observe the cycloid motion of the electrons in the surface states.Comment: 6 pages, 4 figure

Ultrafast spin dynamics: complementing theoretical analyses by quantum-information measures

Theoretical analyses of ultrafast spin dynamics commonly address and discuss simulated phenomena by means of observables, whereas in quantum information theory one often utilizes measures of quantum states. In this Paper we report on possible benefits of quantum information measures in simulations of ultrafast spin dynamics. For Co/Cu heterostructures illuminated by femtosecond laser pulses, we discuss the general behaviour of quantum information measures, in particular distances in Hilbert space and degrees of mixing in the density matrix. The measures are in particular sensitive to variations of the polarization of a laser pulse and the sample composition. Moreover, they are closely related to magnetization and number of excited electrons