We study how the C11 memory model can be simplified and how it can be extended. Our first contribution is to propose a mild strengthening of the model that enables the rules pertaining to sequentially-consistent (SC) operations to be significantly simplified. We eliminate one of the total orders that candidate executions must range over, leading to a model that is significantly faster to simula...

The field of concurrent separation logics (CSLs) has recently undergone two exciting developments: (1) the Iris framework for encoding and unifying advanced higher-order CSLs and formalizing them in Coq, and (2) the adaptation of CSLs to account for weak memory models, notably C11’s release-acquire (RA) consistency. Unfortunately, these developments are seemingly incompatible, since Iris only a...

Sequence analysis revealed a strong homology between the ligand-binding domain (LBD) of the human mineralocorticoid receptor (hMR) and glucocorticoid receptor (hGR). Nevertheless, steroids with bulky C11-substituents bind to hGR, unlike hMR. In this report, a mutant hMR, in which the residue Ala-773 facing the C11 steroid position was replaced by a glycine (A773G), was assayed for its capacity ...

The geometric relaxation following light absorption of the biliverdin, phycocyanobilin and phytochromobilin tetrapyrrole chromophores of bacterial, cyanobacterial and plant phytochromes has been investigated using density functional theory methods. Considering stereoisomers relevant for both red-absorbing Pr and far-red-absorbing Pfr forms of the photoreceptor, it is found that the initial exci...

Using a novel laser-induced ultrasonic probe, we have examined the bulk viscoelastic properties of fully hydrated dipalmitoylphosphatidylcholine (DPPC) aligned multibilayers in terms of the anisotropic in-plane elastic stiffness (C11) and viscosity (eta 11). Our measurements of C11 are in accord with those reported on Brillouin light scattering on a similar system. Our measurements on viscosity...

We describe a simple, but powerful, program logic for reasoning about C11 relaxed accesses used in conjunction with release and acquire memory fences. Our logic, called fenced separation logic (FSL), extends relaxed separation logic with special modalities for describing state that has to be protected by memory fences. Like its precursor, FSL allows ownership transfer over synchronizations and ...

The natural rate is the equilibrium rate under flexible prices, and the gap is the difference between the actual and natural rates. Since prices adjust eventually, the Beveridge–Nelson (B–N) decomposition gives the statistical counterparts of the two notions. Measuring cycles in the gap is of interest from the new neoclassical synthesis perspective. The Bayesian multivariate B–N decomposition g...