89 research outputs found
Elliptic flow of resonances at RHIC: probing final state interactions and the structure of resonances
We propose the measurement of the elliptic flow of hadron resonances at the
Relativistic Heavy Ion Collider as a tool to probe the amount of hadronic final
state interactions for resonances at intermediate and large transverse momenta.
This can be achieved by looking at systematic deviations of the measured flow
coefficient from the scaling law given by the quark recombination
formalism. Our method can be generalized to explore the structure of exotic
particles, such as the recently found pentaquark .Comment: 5 pages, 2 figures; v2: accepted version for publication in Physical
Review C rapid communication
Effects of glucagon‐like peptide‐1 receptor agonists liraglutide and semaglutide on cardiovascular and renal outcomes across body mass index categories in type 2 diabetes: results of the LEADER and SUSTAIN 6 trials
Age and skill bias of trade liberalisation? : heterogeneous employment effects of EU Eastern Enlargement
This study analyses the 2004 Eastern Enlargement to the European Union to
obtain evidence on the employment effects of an increase in trade liberalisation. The
Enlargement is thought to generate a trade-induced demand shock with no (or only
limited) supply effects. Besides the variation over time induced by the Enlargement,
identification of the effects is based on a Melitz (2003) type productivity term to
differentiate firms by the extent of exposure to the demand shock. The idea is that the
effects of the demand shock should be driven by differences in firm-level productivity
from the period before the new member countries actually entered the EU. German
linked employer-employee data allow to observe the relation of initial establishment
productivity with employment changes over a long panel from 1995 to 2009. The
estimates show that the Enlargement had a negative effect on establishment-level
employment growth, which is driven by increased worker separations and increased
job destruction. Besides the overall employment effect, the study focuses on effect
heterogeneity across age and skill groups of the workforce. These estimates point to a
skill bias in the effect of the Enlargement that disadvantages low- and medium-skilled
workers in terms of higher worker separation and job destruction. In addition, lowskilled
workers suffer fewer accessions by firms, where against medium-skilled workers
enjoy increased accessions and creation of new jobs. Besides this indication for a skill
bias, there are no clear indications that point to an age bias in the employment effect
of the Eastern Enlargement
Global observables and secondary interactions in central Au+Au reactions at AGeV
The Ultra-relativistic Quantum Molecular Dynamics model (UrQMD) is used to
study global observables in central reactions of Au+Au at AGeV
(RHIC). Strong stopping governed by massive particle production is predicted if
secondary interactions are taken into account. The underlying string dynamics
and the early hadronic decoupling implies only small transverse expansion
rates. However, rescattering with mesons is found to act as a source of
pressure leading to additional flow of baryons and kaons, while cooling down
pions
A randomized trial of the effects of the noble gases helium and argon on neuroprotection in a rodent cardiac arrest model
Multiple-Color Optical Activation, Silencing, and Desynchronization of Neural Activity, with Single-Spike Temporal Resolution
The quest to determine how precise neural activity patterns mediate computation, behavior, and pathology would be greatly aided by a set of tools for reliably activating and inactivating genetically targeted neurons, in a temporally precise and rapidly reversible fashion. Having earlier adapted a light-activated cation channel, channelrhodopsin-2 (ChR2), for allowing neurons to be stimulated by blue light, we searched for a complementary tool that would enable optical neuronal inhibition, driven by light of a second color. Here we report that targeting the codon-optimized form of the light-driven chloride pump halorhodopsin from the archaebacterium Natronomas pharaonis (hereafter abbreviated Halo) to genetically-specified neurons enables them to be silenced reliably, and reversibly, by millisecond-timescale pulses of yellow light. We show that trains of yellow and blue light pulses can drive high-fidelity sequences of hyperpolarizations and depolarizations in neurons simultaneously expressing yellow light-driven Halo and blue light-driven ChR2, allowing for the first time manipulations of neural synchrony without perturbation of other parameters such as spiking rates. The Halo/ChR2 system thus constitutes a powerful toolbox for multichannel photoinhibition and photostimulation of virally or transgenically targeted neural circuits without need for exogenous chemicals, enabling systematic analysis and engineering of the brain, and quantitative bioengineering of excitable cells
Cardiovascular disease in patients with rheumatoid arthritis: results from the QUEST-RA study
QCD and strongly coupled gauge theories : challenges and perspectives
We highlight the progress, current status, and open challenges of QCD-driven physics, in theory and in experiment. We discuss how the strong interaction is intimately connected to a broad sweep of physical problems, in settings ranging from astrophysics and cosmology to strongly coupled, complex systems in particle and condensed-matter physics, as well as to searches for physics beyond the Standard Model. We also discuss how success in describing the strong interaction impacts other fields, and, in turn, how such subjects can impact studies of the strong interaction. In the course of the work we offer a perspective on the many research streams which flow into and out of QCD, as well as a vision for future developments.Peer reviewe
Variação temporal do zooplâncton da Praia de Tramandaí, Rio Grande do Sul, com ênfase em Copepoda
Fundulus as the premier teleost model in environmental biology : opportunities for new insights using genomics
Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Comparative Biochemistry and Physiology Part D: Genomics and Proteomics 2 (2007): 257-286, doi:10.1016/j.cbd.2007.09.001.A strong foundation of basic and applied research documents that the estuarine fish Fundulus heteroclitus and related species are unique laboratory and field models for understanding how individuals and populations interact with their environment. In this paper we summarize an extensive body of work examining the adaptive responses of Fundulus species to environmental conditions, and describe how this research has contributed importantly to our understanding of physiology, gene regulation, toxicology, and ecological and evolutionary genetics of teleosts and other vertebrates. These explorations have reached a critical juncture at which advancement is hindered by the lack of genomic resources for these species. We suggest that a more complete genomics toolbox for F. heteroclitus and related species will permit researchers to exploit the power of this model organism to rapidly advance our understanding of fundamental biological and pathological mechanisms among vertebrates, as well as ecological strategies and evolutionary processes common to all living organisms.This material is based on work supported by grants from the National Science Foundation DBI-0420504 (LJB), OCE 0308777 (DLC, RNW, BBR), BES-0553523 (AW), IBN 0236494 (BBR), IOB-0519579 (DHE), IOB-0543860 (DWT), FSML-0533189 (SC); National Institute of Health NIEHS P42-ES007381(GVC, MEH), P42-ES10356 (RTD), ES011588 (MFO); and NCRR P20 RR-016463 (DWT); Natural Sciences and Engineering Research Council of Canada Discovery (DLM, TDS, WSM) and Collaborative Research and Development Programs (DLM); NOAA/National Sea Grant NA86RG0052 (LJB), NA16RG2273 (SIK, MEH,GVC, JJS); Environmental Protection Agency U91620701 (WSB), R82902201(SC) and EPA’s Office of Research and Development (DEN)
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