Results 71 to 80 of about 2,976,908 (302)

Perturbation expansion for the diluted two-dimensional XY model

, 2006
We study the quasi-long-range ordered phase of a 2D XY model with quenched site-dilution using the spin-wave approximation and expansion in the parameter which characterizes the deviation from completely homogeneous dilution.
B. Berche, Berche, Berezinskii, Chaikin, Dotsenko, Dukovski, Harris, Hohenberg, Kosterlitz, Kosterlitz, Mermin, Nelson, O. Kapikranian, Paula, Shalaev, Vaks, Villain, Wegner, Wolff, Wysin, Yu. Holovatch   +20 more
core   +1 more source

Measurement of high-order polarization mode dispersion [PDF]

, 2000
We demonstrate a new method to measure high-order polarization mode dispersion (PMD) using the Jones matrix exponential expansion. High-order PMD is characterized by measuring a series of characteristic matrices, which are convenient quantities for ...
Eyal, A., Hedekvist, P.-O., Li, Yi, Yariv, A,   +3 more
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Predicting Source Populations of Vagrants Using Breeding Population Data: A Case Study of the Lesser Black-Backed Gull (Larus fuscus)

Frontiers in Ecology and Evolution, 2021
Vagrancy is critical in facilitating range expansion and colonization through exploration and occupation of potentially suitable habitat. Uncovering origins of vagrants will help us better understand not only species-specific vagrant movements, but how ...
Lucinda C. Zawadzki, Gunnar T. Hallgrimsson, Richard R. Veit, Richard R. Veit, Lars M. Rasmussen, David Boertmann, Natasha Gillies, Tim Guilford   +7 more
doaj   +1 more source

Effective range expansion in various scenarios of EFT($\notpi$)

, 2011
Using rigorous solutions, we compare the ERE parameters obtained in three different scenarios of EFT($\notpi$) in nonperturbative regime. A scenario with unconventional power counting (like KSW) is shown to be disfavored by the PSA data, while the one ...
, Beane S., Beane S., de Swart J. J. Terheggen C. P. F. Stoks V. G. J., Gegelia J., Ji-Feng Yang, Lepage G. P., Machleidt R., Yang J.-F, Yang J.-F., Yang J.-F.   +10 more
core   +1 more source

The effective Lagrangian of dark energy from observations [PDF]

, 2012
Using observational data on the expansion rate of the universe (H(z)) we constrain the effective Lagrangian of the current accelerated expansion. Our results show that the effective potential is consistent with being flat i.e., a cosmological constant ...
A.A. Starobinsky, A.G. Riess ., Andrea Cimatti, C. Cheung, D. Stern, D. Stern ., J.K. Bloomfield, L. Verde, Licia Verde, Lucia Pozzetti, M. Moresco, M. Moresco ., Michele Moresco, P Talavera, R. Jimenez, R. Jimenez, R. Jimenez ., Raul Jimenez, Supernova Cosmology Project collaboration, Supernova Search Team collaboration, WMAP collaboration   +20 more
core   +2 more sources

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Against the flow: evidence of multiple recent invasions of warmer continental shelf waters by a Southern Ocean brittle star

Frontiers in Ecology and Evolution, 2015
The Southern Ocean is anomalously rich in benthos. This biodiversity is native, mostly endemic and perceived to be uniquely threatened from climate- and anthropogenically- mediated invasions.
Chester John Sands, Timothy eO'Hara, David K. A. Barnes, Rafael eMartín-Ledo   +3 more
doaj   +1 more source

Eastern redcedar roots create legacy effects that suppresses growth of prairie species

Ecology and Evolution, 2023
The expansion of woody species from their historical ranges into grasslands is a global problem. Understanding the mechanisms that enable species to successfully establish and then re‐encroach following their removal is critical to effectively managing ...
Leland D. Bennion, David Ward
doaj   +1 more source