Results 51 to 60 of about 1,320,114 (290)

Rapoport effect in South American Carnivora (Mammalia): null models under geometric and phylogenetic constraints

Brazilian Journal of Biology
Rapoport effect predicts that species geographic range sizes will increase toward higher latitudes, probably reflecting adaptations to extreme climatic conditions that increase species tolerance.
J. A. F. DINIZ-FILHO, N. M. TÔRRES
doaj   +1 more source

On perfect fluid models in non-comoving observational spherical coordinates

, 2004
We use null spherical (observational) coordinates to describe a class of inhomogeneous cosmological models. The proposed cosmological construction is based on the observer past null cone.
A.G. Reiss, D.N. Mogue, E. Poisson, G. Lemaître, G.C. McVittie, G.F.R. Ellis, G.F.R. Ellis, G.F.R. Ellis, H. Bondi, H. Stephani, J. Carot, J. Kristian, J.M. Senovilla, K. Lake, K. Santosuosso, M. Ishak, M. Strauss, M.B. Ribeiro, M.E. Araujo, M.E. Araujo, M.E. Araujo, M.E. Cahill, Mustapha Ishak, P.C. Vaidya, R. Maartens, R. Maartens, R. Sachs, S. Hayward, S. Perlmutter, T. Zannias, V.V. Narlikar, V.V. Narlikar, W. Davidson, W.C. Hernandez, W.R. Stoeger, W.R. Stoeger, W.R. Stoeger, W.R. Stoeger, W.R. Stoeger   +38 more
core   +1 more source

Generalised chiral null models and rotating string backgrounds [PDF]

, 1996
We consider an extension of a special class of conformal sigma models (`chiral null models') which describe extreme supersymmetric string solutions.
A.A. Tseytlin, Amati, Bergshoeff, Breckenridge, Breckenridge, Callan, Callan, Callan, Callan, Cvetič, Cvetič, Cvetič, Cvetič, Cvetič, Das, Dowker, Dowker, Horowitz, Horowitz, Horowitz, Horowitz, Horowitz, Horowitz, Hull, Kiritsis, Larsen, Lowe, Myers, Russo, Russo, Schwarz, Sen, Strominger, Tseytlin, Tseytlin, Tseytlin, Tseytlin, Waldram   +37 more
core   +2 more sources

A matrix model for the null-brane [PDF]

Journal of High Energy Physics, 2006
26 pages, LaTeX; references ...
Robbins, Daniel, Sethi, Savdeep
openaire   +2 more sources

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

String Propagation in Bianchi Type I models: Dynamical anisotropy Damping and Consequences [PDF]

, 1998
A generic ansatz is introduced which provides families of exact solutions to the equations of motion and constraints for null-strings in Bianchi type I cosmological models. This is achieved irrespective of the form of the metric.
A Kuiroukidis, Birrell N D, Collins C B, D B Papadopoulos, de Vega H J, de Vega H J, de Vega H J, Doroshkevich A G, Giannakis I, Green M, K Kleidis, Karlhede A, Larsen A L, Lousto C O, Mandl F, Misner C W, Narlikar J V, Roshchupkin S N, Salim J M   +18 more
core   +2 more sources

Modeling: Neutral, Null, and Baseline [PDF]

Philosophy of Science, 2018
Two strategies for using a model as “null” are distinguished.Null modelingevaluates whether a process is causally responsible for a pattern by testing it against a null model.Baseline modelingmeasures the relative significance of various processes responsible for a pattern by detecting deviations from a baseline model.
openaire   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source

Lightning network: a second path towards centralisation of the Bitcoin economy

New Journal of Physics, 2020
The Bitcoin lightning network (BLN), a so-called ‘second layer’ payment protocol, was launched in 2018 to scale up the number of transactions between Bitcoin owners.
Jian-Hong Lin, Kevin Primicerio, Tiziano Squartini, Christian Decker, Claudio J Tessone   +4 more
doaj   +1 more source

Spatial averaging and apparent acceleration in inhomogeneous spaces

, 2011
As an alternative to dark energy that explains the observed acceleration of the universe, it has been suggested that we may be at the center of an inhomogeneous isotropic universe described by a Lemaitre-Tolman-Bondi (LTB) solution of Einstein's field ...
A.A. Starobinsky, A.E. Romano, Antonio Enea Romano, C.M. Hirata, D. Palle, G. Lemaitre, H. Alnes, H. Bondi, K. Bolejko, K. Tomita, K. Tomita, Misao Sasaki, R.A. Vanderveld, R.C. Tolman, T. Biswas, T. Chiba   +15 more
core   +1 more source