University of Hamburg

About: University of Hamburg is a education organization based out in Hamburg, Germany. It is known for research contribution in the topics: Population & Laser. The organization has 45564 authors who have published 89286 publications receiving 2850161 citations. The organization is also known as: Hamburg University.

Performance of the ATLAS Trigger System in 2010

Abstract: Proton-proton collisions at root s = 7 TeV and heavy ion collisions at root(NN)-N-s = 2.76 TeV were produced by the LHC and recorded using the ATLAS experiment's trigger system in 2010. The LHC is designed with a maximum bunch crossing rate of 40 MHz and the ATLAS trigger system is designed to record approximately 200 of these per second. The trigger system selects events by rapidly identifying signatures of muon, electron, photon, tau lepton, jet, and B meson candidates, as well as using global event signatures, such as missing transverse energy. An overview of the ATLAS trigger system, the evolution of the system during 2010 and the performance of the trigger system components and selections based on the 2010 collision data are shown. A brief outline of plans for the trigger system in 2011 is presented.

Bilingual first language acquisition at the interface between syntax and pragmatics

Abstract: This paper has as its starting point the assumption that in acquiring two languages from birth, bilingual children separate their grammars from very early on. This does not, however, exclude cross-linguistic influence – the possible influence of one language on the other. The main focus of the paper is on the acquisition of syntax in a generative framework. We argue that cross-linguistic influence can occur if (1) an interface level between two modules of grammar is involved, and (2) the two languages overlap at the surface level. We show that both conditions hold for object drop, but not for root infinitives. Root infinitives satisfy the first condition: they involve the interface between syntax and pragmatics. However, they do not satisfy the second condition. Therefore, we expect cross-linguistic influence to occur only in the domain of object drop and not in the domain of root infinitives. Comparing the development of the two phenomena in a bilingual Dutch–French and a German–Italian child to the development in monolingual children, we show that this prediction is borne out by our data. Moreover, this confirms the hypothesis that cross-linguistic influence is due to language internal factors and not to language external factors such as language dominance: the periods during which we observe influence in the domain of object drop and non-influence in the domain of root infinitives are identical.

Serial time-resolved crystallography of photosystem II using a femtosecond X-ray laser.

Abstract: Photosynthesis, a process catalysed by plants, algae and cyanobacteria converts sunlight to energy thus sustaining all higher life on Earth. Two large membrane protein complexes, photosystem I and ...

Sexual and physical abuse during childhood and adulthood as predictors of hallucinations, delusions and thought disorder.

Abstract: In light of recent studies indicating a relationship between child abuse and the positive symptoms of schizophrenia, this study investigated the hypotheses that childhood sexual and physical abuse are related to hallucinations, delusions, and thought disorder in adults, and that those relationships are greater in those who have suffered abuse during adulthood as well as childhood. In 200 community mental-health-centre clients, the clinically evaluated symptomatology of the 92 clients whose files documented sexual or physical abuse at some point in their lives was compared with that of the 108 for whom no abuse was documented. In the 60 patients for whom child abuse was documented, hallucinations (including all six subtypes), but not delusions, thought disorder or negative symptoms, were significantly more common than in the non-abused group. Adult sexual assault was related to hallucinations, delusions, and thought disorder. In linear regression analysis, a combination of child abuse and adult abuse predicted hallucinations, delusions, and thought disorder. However, child abuse was a significant predictor of auditory and tactile hallucinations, even in the absence of adult abuse. Possible psychological and neurobiological pathways from abuse to symptoms are discussed, along with research and clinical implications.

Determinants of Traditional Sustainability Reporting Versus Integrated Reporting. An Institutionalist Approach

Abstract: The aim of this study is to analyze similarities and differences between companies with traditional sustainability reporting (TSR) and those that publish integrated reports. Based on institutional theory we identify potential determinants of integrated reporting (IR) and test their relevance empirically in a sample of 309 companies. Our analysis shows that IR companies are different from TSR companies with regard to several country-level determinants. In particular, investor and employment protection laws, the intensity of market coordination and ownership concentration, the level of economic, environmental and social development, the degree of national corporate responsibility and the value system of the country of origin proved to be relevant. Based on these results, both implications for practice and future studies are derived. Copyright © 2011 John Wiley & Sons, Ltd and ERP Environment.