Results 1 to 10 of about 41,477,438 (316)

Considerations for crossover design in clinical study [PDF]

Korean Journal of Anesthesiology, 2021
This article introduces a crossover design that is often used in clinical studies, with the advantage of comparing treatment effects within one study subject. In particular, the advantages and disadvantages of the two-period, two-sequence crossover design (2 × 2 or AB/BA crossover design), which is widely used in clinical practice, are identified, and
Chi-Yeon Lim, Junyong In
openaire   +5 more sources

Dimensional crossover in quantum critical metallic magnets [PDF]

Phys. Rev. B 78, 235118 (2008), 2008
Nearly magnetic metals often have layered lattice structures, consisting of coupled planes. In such a situation, physical properties will display, upon decreasing temperature or energy, a dimensional crossover from two-dimensional (2d) to three-dimensional (3d) behavior, which is particularly interesting near quantum criticality.
A. I. Larkin, A. I. Larkin, Achim Rosch, Lars Fritz, Markus Garst, Matthias Vojta, P. Gegenwart, S. Sachdev, T. Moriya   +8 more
arxiv   +3 more sources

Band-edge BCS-BEC crossover in a two-band superconductor: physical properties and detection parameters [PDF]

Supercond. Sci. Technol. 27, 124002 (2014), 2014
Superconductivity in iron-based, magnesium diborides, and other novel superconducting materials has a strong multi-band and multi-gap character. Recent experiments support the possibillity for a BCS-BEC crossover induced by strong-coupling and proximity of the chemical potential to the band edge of one of the bands.
Guidini, Andrea, Perali, Andrea
arxiv   +3 more sources

Crossover phenomena in spin models with medium-range interactions and self-avoiding walks with medium-range jumps [PDF]

Phys.Rev. E64 (2001) 046130, 2001
We study crossover phenomena in a model of self-avoiding walks with medium-range jumps, that corresponds to the limit $N\to 0$ of an $N$-vector spin system with medium-range interactions. In particular, we consider the critical crossover limit that interpolates between the Gaussian and the Wilson-Fisher fixed point.
A. D. Sokal, A. D. Sokal, A. J. Guttmann, A. Kostrowicka Wyczalkowska, A. Pelissetto, A. Pelissetto, A. Pelissetto, A. Pelissetto, A. R. Conway, A. R. Conway, B. G. Nickel, B. G. Nickel, B. G. Nickel, B. Li, B. Nienhuis, B. Nienhuis, C. Aragão de Carvalho, C. Bagnuls, C. Bagnuls, C. Bagnuls, C. Bagnuls, C. Domb, D. MacDonald, E. Brézin, E. Luijten, E. Luijten, E. Luijten, E. Luijten, E. Luijten, E. Luijten, E. Luijten, E. Luijten, F. Jasch, G. A. Baker, Jr., G. A. Baker, Jr., G. Besold, G. Orkoulas, G. Parisi, G. Parisi, G. Parisi, G. R. Golner, G. X. Jin, H. J. Krause, H. Kleinert, H. Kleinert, H. Saleur, H. Yamakawa, I. Guim, J. C. Le Guillou, J. des Cloizeaux, J. des Cloizeaux, J. F. Douglas, J. F. Douglas, J. F. Nicoll, J. Magnen, J. Magnen, J. P. Eckmann, J. S. Feldman, J. S. Kouvel, J. S. Pedersen, K. Binder, K. E. Newman, K. G. Chetyrkin, K. K. Mon, L. Lue, L. N. Lipatov, L. Schäfer, M. A. Anisimov, M. A. Anisimov, M. A. Anisimov, M. A. Anisimov, M. Caselle, M. Daoud, M. Muthukumar, M. Muthukumar, M. Y. Belyakov, N. Eizenberg, N. Eizenberg, N. Madras, P. Butera, P. Butera, P. Calabrese, P. G. de Gennes, P. G. de Gennes, P. Grassberger, P. Grassberger, P. Grassberger, R. Guida, R. Schloms, S. B. Kiselev, S. B. Kiselev, S. Caracciolo, S. Caracciolo, S. Caracciolo, S. Caracciolo, S. Caracciolo, V. A. Agayan, V. Dohm, V. Dohm, V. J. Emery, V. L. Ginzburg, W. H. Stockmayer, W. H. Stockmayer, Z. Alexandrowicz, Z. Alexandrowicz, Z. Y. Chen, Z. Y. Chen, Z. Y. Chen, Z. Y. Chen   +108 more
arxiv   +3 more sources

Crossover from the parity-conserving pair contact process with diffusion to other universality classes [PDF]

PRE 79, 056115 (2009), 2009
The pair contact process with diffusion (PCPD) with modulo 2 conservation (\pcpdt) [$2A\to 4A$, $2A\to 0$] is studied in one dimension, focused on the crossover to other well established universality classes: the directed Ising (DI) and the directed percolation (DP).
Hyunggyu Park, I. D. Lawrie, J. Cardy, Su-Chan Park   +3 more
arxiv   +3 more sources

Universality and Crossover of Directed Polymers and Growing Surfaces [PDF]

, 1999
We study KPZ surfaces on Euclidean lattices and directed polymers on hierarchical lattices subject to different distributions of disorder, showing that universality holds, at odds with recent results on Euclidean lattices. Moreover, we find the presence of a slow (power-law) crossover toward the universal values of the exponents and verify that the ...
B. Derrida, D. A. Huse, D. A. Huse, H. Chaté, M. Kardar, M. Marsili, Paolo De Los Rios, T. Halpin-Healy, T. J. Newman, T. J. Newman   +9 more
arxiv   +3 more sources

The Relationship between Chocolate Consumption and the Severity of Acne Lesions−A Crossover Study [PDF]

Foods
The aim of this study was to assess the relationship between the daily consumption of 50 g of chocolate with 85% cocoa content and the severity of acne lesions. Methods: The study involved 92 participants with acne who were divided into two groups, A (n =
Magdalena Daszkiewicz, Dorota Różańska, Bożena Regulska-Ilow   +2 more
doaj   +2 more sources

A case-crossover study of air pollution exposure during pregnancy and the risk of stillbirth in Tehran, Iran [PDF]

Scientific Reports
The growing fetus is very sensitive to environmental conditions. There is limited and conflicting evidence about the short-term effects of exposure to air pollutants on the pregnancy outcome.
Nadia Mohammadi Dashtaki, Mohammad Fararouei, Alireza Mirahmadizadeh, Mohammad Hoseini, Mohammad Heidarzadeh   +4 more
doaj   +2 more sources

Comparison of two brief mindfulness interventions for anxiety, stress and burnout in mental health professionals: a randomised crossover trial

Frontiers in Psychology, 2023
BackgroundAnxiety, stress and burnout are a growing reality among mental health professionals, impacting negatively on them and their clients. Mindfulness-based interventions (MBIs) have demonstrated effectiveness in mitigating these sufferings ...
Raquel Ruiz-Íñiguez, Ana Carralero Montero, Francisco A. Burgos-Julián, Justo R. Fabelo Roche, Miguel Á. Santed   +4 more
doaj   +1 more source

Reduction in contraceptive use during the COVID-19 pandemic among women in an indigenous Mexican community: a retrospective crossover study

Frontiers in Public Health, 2023
BackgroundBeing indigenous, being a woman, and living in poverty are social determinants that contribute to reduced access to healthcare, including reproductive health services.
Lilia V. Castro-Porras, María Alejandra Aguilar-Rodríguez, Mario E. Rojas-Russell, Bertha A. Salinas-Iracheta   +3 more
doaj   +1 more source