Results 31 to 40 of about 354,856 (200)

Entanglement in quantum impurity problems is non perturbative

open access: yes, 2013
We study the entanglement entropy of a region of length 2L with the remainder of an infinite one dimensional gapless quantum system in the case where the region is centered on a quantum impurity.
Saleur, Hubert   +2 more
core   +1 more source

Antibiotics and oral contraceptive failure - a case-crossover study [PDF]

open access: yes, 2011
Background: Evidence on the association between antibiotic use and combined oral contraceptive (COC) failure is controversial. We examined the effect of concomitant antibiotic treatment on the risk of breakthrough pregnancy among COC users. Study Designs:
Anderka, Marlene   +4 more
core   +2 more sources

QCD thermodynamics with two flavors of Wilson quarks at N_t=6

open access: yes, 1992
We report on a study of hadron thermodynamics with two flavors of Wilson quarks on 12^3x6 lattices. We have studied the crossover between the high and low temperature regimes for three values of the hopping parameter, kappa=0.16, 0.17, and 0.18.
Alex Krasnitz   +21 more
core   +1 more source

Nurse Staffing Level and Nosocomial Infections: Empirical Evaluation of the Case-Crossover and Case-Time-Control Designs [PDF]

open access: yes, 2017
The authors compared a case-crossover design, a case-time-control design, and a cohort design to evaluate the effect of nurse staffing level on the risk of nosocomial infections.
Hugonnet, Stéphane   +2 more
core  

A case of crossover mixed analyses in mathematics education research

open access: yesMethods in Psychology
Crossover mixed analysis, which integrates qualitative and quantitative traditions, is fruitful for advancing mixed methods research. Employing a pragmatic theoretical perspective, we report a case study investigating the use of crossover mixed analyses ...
Heather Lynn Johnson   +2 more
doaj   +1 more source

Unfolding and unzipping of single-stranded DNA by stretching

open access: yes, 2004
We present a theoretical study of single-stranded DNA under stretching. Within the proposed framework, the effects of basepairing on the mechanical response of the molecule can be studied in combination with an arbitrary underlying model of chain ...
Alexei V. Tkachenko   +4 more
core   +1 more source

Non-Fickian Interdiffusion of Dynamically Asymmetric Species: A Molecular Dynamics Study [PDF]

open access: yes, 2005
We use Molecular Dynamics combined with Dissipative Particle Dynamics to construct a model of a binary mixture where the two species differ only in their dynamic properties (friction coefficients).
Duenweg, Burkhard   +2 more
core   +3 more sources

Synchronized shocks in an inhomogeneous exclusion process

open access: yes, 2015
We study an exclusion process with 4 segments, which was recently introduced by T Banerjee, N Sarkar and A Basu [J. Stat. Mech. (2015) P01024]. The segments have hopping rates 1, r(
Arita, Chikashi
core   +1 more source

Criteria air pollutants and hospitalizations of a wide spectrum of cardiovascular diseases: A nationwide case-crossover study in China

open access: yesEco-Environment & Health, 2022
Few national studies have systemically examined the effects of criteria air pollutants on cardiovascular morbidity. This study aimed to investigate the associations between all criteria air pollutants and hospitalization of cause-specific cardiovascular ...
Cong Liu   +8 more
doaj   +1 more source

Phase diagram of polymer blends in confined geometry [PDF]

open access: yes, 2000
Within self-consistent field theory we study the phase behavior of a symmetrical binary AB polymer blend confined into a thin film. The film surfaces interact with the monomers via short range potentials.
Albano, E. V., Binder, K., Mueller, M.
core   +2 more sources

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