Results 81 to 90 of about 170,507 (251)

Computing the Yolk in Spatial Voting Games without Computing Median Lines [PDF]

arXiv, 2019
The yolk is an important concept in spatial voting games as it generalises the equilibrium and provides bounds on the uncovered set. We present near-linear time algorithms for computing the yolk in the spatial voting model in the plane. To the best of our knowledge our algorithm is the first algorithm that does not require precomputing the median lines
arxiv  

The corn snake yolk sac becomes a solid tissue filled with blood vessels and yolk-rich endodermal cells

Biology Letters, 2014
The amniote egg was a key innovation in vertebrate evolution because it supports an independent existence in terrestrial environments. The egg is provisioned with yolk, and development depends on the yolk sac for the mobilization of nutrients.
R. Elinson, J. R. Stewart
semanticscholar   +1 more source

BMP4 regulates asymmetric Pkd2 distribution in mouse nodal immotile cilia and ciliary mechanosensing required for left–right determination

Developmental Dynamics, EarlyView.
Abstract Background Mouse nodal immotile cilia mechanically sense the bending direction for left–right (L–R) determination and activate the left‐side‐specific signaling cascade, leading to increased Nodal activity. Asymmetric distribution of Pkd2, a crucial channel for L–R determination, on immotile cilia has been reported recently. However, the causal
Takanobu A. Katoh, Tim Lange, Yoshiro Nakajima, Kenta Yashiro, Yasushi Okada, Hiroshi Hamada   +5 more
wiley   +1 more source

Mixed Germ Cell Tumor with Extensive Yolk Sac Tumor Elements in the Frontal Lobe of an Adult

Case Reports in Surgery, 2012
Intracranial nongerminomatous germ cell tumors (NGGCTs) in unusual locations are extremely rare. Here, we report a case of a yolk sac tumor in the frontal lobe in a middle-aged patient.
Toshihide Takahashi, Eiichi Ishikawa, Yosuke Masuda, Tetsuya Yamamoto, Taiki Sato, Makoto Shibuya, Akira Matsumura   +6 more
doaj   +1 more source

Egg quality, fatty acids profile, and hatchability of broiler breeders fed diets supplemented with Conjugated Linoleic Acid (CLA) [PDF]

Ciência e Agrotecnologia
Conjugated linoleic acid (CLA) refers to a group of positional and geometric isomers of linoleic acid. Hens fed a diet supplemented with CLA exhibit increased levels of saturated fatty acids, which may influence the quality characteristics of eggs and ...
Poliana Carneiro Martins, Itallo Conrado Sousa de Araújo, Januária Silva Santos, Fabyola Barros de Carvalho, Maria Auxiliadora Andrade, José Henrique Stringhini   +5 more
doaj   +1 more source

Adult Langerhans cells derive predominantly from embryonic fetal liver monocytes with a minor contribution of yolk sac–derived macrophages

Journal of Experimental Medicine, 2012
Langerhans cell precursors initially arise from yolk sac progenitors, but are later superseded by fetal liver monocytes.
Guillaume Hoeffel, Yilin Wang, M. Greter, Peter See, P. Teo, B. Malleret, M. Leboeuf, Donovan Low, Guillaume Oller, F. F. Almeida, Sharon H.Y. Choy, M. Grisotto, L. Rénia, S. Conway, E. Stanley, Jerry Chan, Jerry Chan, L. Ng, I. Samokhvalov, M. Merad, F. Ginhoux   +20 more
semanticscholar   +1 more source

A network of transient domains for breaking symmetry during anterior–posterior axis formation in the porcine embryo

Developmental Dynamics, EarlyView.
Abstract Breaking radial symmetry for anterior–posterior axis formation is one of the key developmental steps of vertebrate gastrulation and is established through a succession of transient domains defined by morphology or gene expression. Three such domains were interpreted recently in the rabbit to be part of a “three‐anchor‐point model” for axis ...
Ruben Plöger, Nikoloz Tsikolia, Christoph Viebahn   +2 more
wiley   +1 more source

Transport of maternal LDL and HDL to the fetal membranes and placenta of the Golden Syrian hamster is mediated by receptor-dependent and receptor-independent processes

Journal of Lipid Research, 1998
Maternal lipoproteins provide nutrients to the fetus via the placenta, yolk sac, and uterine membrane plus decidua. To determine the transport processes that are responsible for the removal of lipoproteins from the maternal circulation, we measured the ...
Kathleen L. Wyne, Laura A. Woollett
doaj  

Egg yolk as a model for gelation: from rheometry to flow physics [PDF]

Egg yolks are an excellent model for studying sol-gel transitions, particularly the power law viscoelasticity that defines the critical point of gelation. However, prior studies lack comprehensive datasets and fail to visualize flow behavior linked to temperature and time-dependent linear and nonlinear rheology.
arxiv   +1 more source

Meta-SAC: Auto-tune the Entropy Temperature of Soft Actor-Critic via Metagradient [PDF]

arXiv, 2020
Exploration-exploitation dilemma has long been a crucial issue in reinforcement learning. In this paper, we propose a new approach to automatically balance between these two. Our method is built upon the Soft Actor-Critic (SAC) algorithm, which uses an "entropy temperature" that balances the original task reward and the policy entropy, and hence ...
arxiv