Results 61 to 70 of about 719,802 (285)

Higher-order gravity in higher dimensions: geometrical origins of four-dimensional cosmology? [PDF]

, 2017
Determining the cosmological field equations is still very much debated and led to a wide discussion around different theoretical proposals. A suitable conceptual scheme could be represented by gravity models that naturally generalize Einstein theory ...
A. Troisi
semanticscholar   +1 more source

A Comparative Study of Cerebral Oxygenation During Exercise in Hemodialysis and Peritoneal Dialysis Patients

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Cognitive impairment and exercise intolerance are common in dialysis patients. Cerebral perfusion and oxygenation play a major role in both cognitive function and exercise execution; HD session per se aggravates cerebral ischemia in this population. This study aimed to compare cerebral oxygenation and perfusion at rest and in mild
Marieta P. Theodorakopoulou, Konstantina Dipla, Danai Faitatzidou, Fotini Iatridi, Areti Georgiou, Artemios Karagiannidis, Erasmia Sampani, Chrysostomos Dimitriadis, Aggelos Koutlas, Andreas Zafeiridis, Pantelis Sarafidis   +10 more
wiley   +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

Dimensionally continued Oppenheimer-Snyder gravitational collapse. I - solutions in even dimensions

, 1996
The extension of the general relativity theory to higher dimensions, so that the field equations for the metric remain of second order, is done through the Lovelock action.
Anderson Ilha, B. Zumino, C. Lanczos, C. Teitelboim, D. G. Boulware, D. Lovelock, D. M. Eardley, G. A. Mena-Marugán, J. R. Oppenheimer, J. T. Wheeler, José P. S. Lemos, M. Bañados, M. Bañados, N. Deruelle, R. C. Myers, S. W. Hawking, T. Regge, W. Israel, X. Li   +18 more
core   +2 more sources

Chiral 2D "Strange Metals" from N = 4 SYM [PDF]

, 2014
Familiar field theories may contain closed subsectors made out of only fermions, which can be used to explore new and unusual phases of matter in lower dimensions.
Berkooz, Micha, Narayan, Prithvi, Zait, Amir   +2 more
core   +2 more sources

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

An inverse mass expansion for the mutual information in free scalar QFT at finite temperature

Journal of High Energy Physics, 2020
We study the entanglement entropy and the mutual information in coupled harmonic systems at finite temperature. Interestingly, we find that the mutual information does not vanish at infinite temperature, but it rather reaches a specific finite value ...
Dimitrios Katsinis, Georgios Pastras
doaj   +1 more source

Manifestly SL(2, R) Duality-Symmetric Forms in ModMax Theory

Journal of High Energy Physics, 2022
In this paper, we will investigate a manifestly SL(2, R)-invariant structure for the energy-momentum tensor of ModMax theory as a nonlinear modification of Maxwell electrodynamics which includes conformal invariance as well. In the context of this theory,
H. Babaei-Aghbolagh, Komeil Babaei Velni, Davood Mahdavian Yekta, H. Mohammadzadeh   +3 more
doaj   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

Cosmological bounds on large extra dimensions from non-thermal production of Kaluza-Klein modes

, 2003
The existing cosmological constraints on theories with large extra dimensions rely on the thermal production of the Kaluza-Klein modes of gravitons and radions in the early Universe.
A. Mazumdar, A. Mazumdar, A. Mazumdar, C. Hanhart, C.D. Hoyle, Chris Bird, D.A. Knitten, E.A. Mirabelli, G. Dvali, G. Kribs, G. Kribs, G.F. Giudice, G.G. Raffelt, I. Antoniadis, I. Antoniadis, I. Antoniadis, J. Cline, J. Ellis, J.L. Hewett, K. Benakli, K. Benakli, K. Benakli, K.A. Olive, K.R. Dienes, L.J. Hall, M. Kawasaki, M. Kawasaki, M. Kawasaki, Maxim Pospelov, N. Arkani-Hamed, N. Arkani-Hamed, N. Arkani-Hamed, N. Kaloper, N. Kaloper, R. Allahverdi, R. Allahverdi, R. Allahverdi, R.H. Cyburt, R.N. Mohapatra, Rouzbeh Allahverdi, S. Davidson, S. Hannestad, S. Hannestad, S. Hannestad, S. Sarkar, S.C. Kappadath, Stefan Groot Nibbelink, T. Han, T.G. Rizzo, V. Barger, V.A. Rubakov   +50 more
core   +1 more source