67 research outputs found
Universal features of the order-parameter fluctuations : reversible and irreversible aggregation
We discuss the universal scaling laws of order parameter fluctuations in any
system in which the second-order critical behaviour can be identified. These
scaling laws can be derived rigorously for equilibrium systems when combined
with the finite-size scaling analysis. The relation between order parameter,
criticality and scaling law of fluctuations has been established and the
connexion between the scaling function and the critical exponents has been
found. We give examples in out-of-equilibrium aggregation models such as the
Smoluchowski kinetic equations, or of at-equilibrium Ising and percolation
models.Comment: 19 pages, 10 figure
Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set
We report a measurement of the bottom-strange meson mixing phase \beta_s
using the time evolution of B0_s -> J/\psi (->\mu+\mu-) \phi (-> K+ K-) decays
in which the quark-flavor content of the bottom-strange meson is identified at
production. This measurement uses the full data set of proton-antiproton
collisions at sqrt(s)= 1.96 TeV collected by the Collider Detector experiment
at the Fermilab Tevatron, corresponding to 9.6 fb-1 of integrated luminosity.
We report confidence regions in the two-dimensional space of \beta_s and the
B0_s decay-width difference \Delta\Gamma_s, and measure \beta_s in [-\pi/2,
-1.51] U [-0.06, 0.30] U [1.26, \pi/2] at the 68% confidence level, in
agreement with the standard model expectation. Assuming the standard model
value of \beta_s, we also determine \Delta\Gamma_s = 0.068 +- 0.026 (stat) +-
0.009 (syst) ps-1 and the mean B0_s lifetime, \tau_s = 1.528 +- 0.019 (stat) +-
0.009 (syst) ps, which are consistent and competitive with determinations by
other experiments.Comment: 8 pages, 2 figures, Phys. Rev. Lett 109, 171802 (2012
Reforming Watershed Restoration: Science in Need of Application and Applications in Need of Science
Measuring the response bias induced by an experience and application research center
In recent years we have observed the rise of Experience and Application Research centers (EARC). These EARCs simulate realistic environments and are used for the empirical evaluation of interactive systems in a controlled setting. Such laboratory environments are intended to facilitate data collection without influencing the data itself. Accumulated experience in the use of EARCs has raised concerns that test participants could be impressed by the environments and have raised expectations for advanced systems they expect to encounter; this brings about the danger of systematic bias in subjective report data collected with EARCs. To evaluate the impact of an EARC as an instrument, a controlled experiment with 40 test participants was conducted. This experiment involved the replication of a traditional usability test in both the EARC and a traditional laboratory environment. The results of this study provide evidence regarding the validity and reliability of EARCs as instruments for evaluating interactive systems
Fenway Community Health’s Model of Integrated, Community-Based LGBT Care, Education, and Research
Haunted by the past: Effects of poor change management history on employee attitudes and turnover
Change management research has largely ignored the effects of organizational change management history in shaping employee attitudes and behavior. This article develops and tests a model of the effects of poor change management history (PCMH) on employee attitudes (trust, job satisfaction, turnover intentions, change cynicism, and openness to change) and actual turnover. We found that PCMH, through PCMH beliefs, led to lower trust, job satisfaction and openness to change, and higher cynicism and turnover intentions. Also, PCMH beliefs predicted employee turnover over 2 years
Peripherally inserted central catheters and the incidence of candidal sepsis in VLBW and ELBW infants: is sepsis increased?
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