Measurement of J/ψJ/\psi production as a function of event multiplicity in pp collisions at s=13 TeV\sqrt{s} = 13\,\mathrm{TeV} with ALICE

The availability at the LHC of the largest collision energy in pp collisions allows a significant advance in the measurement of $J/\psi$ production as function of event multiplicity. The interesting relative increase observed with data at the LHC at $\sqrt{s} = 7\,\mathrm{TeV}$ and at RHIC at $\sqrt{s} = 0.2\,\mathrm{TeV}$ is studied now at unprecedented multiplicities at $\sqrt{s} = 13\,\mathrm{TeV}$. The measurement at mid-rapidity in the dielectron channel with ALICE is presented and discussed in comparison to predictions from available theoretical models and to data at lower energies.Comment: 4 pages, 4 figures, Proceedings of the XXVIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions, Quark Matter 2017, Chicago, February 6-11, 201

Measurement of J/{\psi} production in pp collisions at LHC energies with ALICE

An overview of ALICE results on the measurement of J/{\psi} production in pp collisions at $\sqrt{s}$ = 7 TeV collected during the LHC Run-1 period is presented, as well as first results at forward rapidity from pp collisions at $\sqrt{s}$ = 13 TeV collected during the LHC Run-2 period. In particular, the measurement of J/{\psi} production as a function of transverse momentum and charged-particle multiplicity are discussed and compared to theoretical model calculations.Comment: 4 pages, 4 figures, Proceedings of Hot Quarks September 12-17, 2016, South Padre Island, Texas, US

How to Educate Entrepreneurs?

Entrepreneurship education has two purposes: To improve students’ entrepreneurial skills and to provide impetus to those suited to entrepreneurship while discouraging the rest. While entrepreneurship education helps students to make a vocational decision its effects may conflict for those not suited to entrepreneurship. This study shows that vocational and the skill formation effects of entrepreneurship education can be identified empirically by drawing on the Theory of Planned Behavior. This is embedded in a structural equation model which we estimate and test using a robust 2SLS estimator. We find that the attitudinal factors posited by the Theory of Planned Behavior are positively correlated with students’ entrepreneurial intentions. While conflicting effects of vocational and skill directed course content are observed in some individuals, overall these types of content are complements. This finding contradicts previous results in the literature. We reconcile the conflicting findings and discuss implications for the design of entrepreneurship courses.Entrepreneurship education; entrepreneurial intention; theory of planned behavior; structural equation models; two stage least squares.

The Effects of Entrepreneurship Education

Entrepreneurship education ranks highly on policy agendas in Europe and the US, but little research is available to assess its impacts. In this context it is of primary importance to understand whether entrepreneurship education raises intentions to be entrepreneurial generally or whether it helps students determine how well suited they are for entrepreneurship. We develop a theoretical model of Bayesian learning in which entrepreneurship education generates signals which help students to evaluate their own aptitude for entrepreneurial tasks. We derive predictions from the model and test them using data from a compulsory entrepreneurship course at a German university. Using survey responses from 189 students ex ante and ex post, we ?nd that entrepreneurial propensity declined somewhat in spite of generally good evaluations of the class. Our tests of Bayesian updating provide support for the notion that students receive valuable signals and learn about their own type in the entrepreneurship course.entrepreneurship; entrepreneurship education; Bayes’ Rule; learning; signals

Challenges to Societal Progress - Pull-back in Response to Disparities

There are empirical grounds for supporting unrestrained, globalized cooperative human measures as being beneficial to the international standard of living. A high extent of interconnectedness on multiple levels has already been realized in transportation systems, energy distribution channels, and communication networks. However, in periods of societal transition, as can be the case under rapid technology development, tensions may arise if disparities in wealth, power, or infrastructure access widen extensively. When subgroups of the citizenry that do not sufficiently partake in progress feel left behind or disenfranchised, their triggering of pull-back phenomena is very common. The pattern is repetitive: disparities not remedied on a lower scale impair integration on a larger scale. Equitable infrastructure maintenance and development, regionally, nationally, and globally, is a powerful policy tool for preempting pull-backs – especially if it is applied to communities with weak support or high inequality. The characteristics of the modern world demand far-reaching collaborations. Only universal interdependence, built from the roots up, can enable progress and social justice

Collective treatment of the giant resonances in spherical nuclei

In a collective treatment the energies of the giant resonances are given by the boundary conditions at the nuclear surface, which is subject to vibration in spherical nuclei. The general form of the coupling between these two collective motions is given by angular-momentum and parity conservation. The coupling constants are completely determined within the hydrodynamical model. In the present treatment the influence of the surface vibrations on the total photon-absorption cross section is calculated. It turns out that in most of the spherical nuclei this interaction leads to a pronounced structure in the cross section. The agreement with the experiments in medium-heavy nuclei is striking; many of the experimental characteristics are reproduced by the present calculations. In some nuclei, however, there seem to be indications of single-particle excitations which are not yet contained in this work

Ascertaining the Values of σx\sigma_x, σy\sigma_y, and σz\sigma_z of a Polarization Qubit

In the 1987 spin retrodiction puzzle of Vaidman, Aharonov, and Albert one is challenged to ascertain the values of $\sigma_x$, $\sigma_y$, and $\sigma_z$ of a spin-1/2 particle by utilizing entanglement. We report the experimental realization of a quantum-optical version in which the outcome of an intermediate polarization projection is inferred by exploiting single-photon two-qubit quantum gates. The experimental success probability is consistently above the 90.2% threshold of the optimal one-qubit strategy, with an average success probability of 95.6%.Comment: 4 pages, 2 figures; final version with new title and new abstract; to appear in Physical Review Letter

The interferon response circuit: Induction and suppression by pathogenic viruses

AbstractType I interferons (IFN-α/β) are potent antiviral cytokines and modulators of the adaptive immune system. They are induced by viral infection or by double-stranded RNA (dsRNA), a by-product of viral replication, and lead to the production of a broad range of antiviral proteins and immunoactive cytokines. Viruses, in turn, have evolved multiple strategies to counter the IFN system which would otherwise stop virus growth early in infection. Here we discuss the current view on the balancing act between virus-induced IFN responses and the viral counterplayers