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Апрель
2024

Новости за 25.04.2024

Plos.org 

WTI, Brent or implied volatility index: Perspective of volatility spillover from oil market to Chinese stock market

by Peng Qin, Manying Bai

This study investigates the impact of oil market uncertainty on the volatility of Chinese sector indexes. We utilize commonly used realized volatility of WTI and Brent oil price along with the CBOE crude oil volatility index (OVX) to embody the oil market uncertainty. Based on the sample span from Mar 16, 2011 to Dec 31, 2019, this study utilizes vector autoregression (VAR) model to derive the impacts of the three different uncertainty indicators on Chinese stock volatilities. Читать дальше...

Plos.org 

Indirect reciprocity with Bayesian reasoning and biases

by Bryce Morsky, Joshua B. Plotkin, Erol Akçay

Reputations can foster cooperation by indirect reciprocity: if I am good to you then others will be good to me. But this mechanism for cooperation in one-shot interactions only works when people agree on who is good and who is bad. Errors in actions or assessments can produce disagreements about reputations, which can unravel the positive feedback loop between social standing and pro-social behaviour. Cooperators can end up punished and defectors rewarded. Читать дальше...

Plos.org 

A weak coupling mechanism for the early steps of the recovery stroke of myosin VI: A free energy simulation and string method analysis

by Florian E. C. Blanc, Anne Houdusse, Marco Cecchini

Myosin motors use the energy of ATP to produce force and directed movement on actin by a swing of the lever arm. ATP is hydrolysed during the off-actin re-priming transition termed recovery stroke. To provide an understanding of chemo-mechanical transduction by myosin, it is critical to determine how the reverse swing of the lever arm and ATP hydrolysis are coupled. Previous studies concluded that the recovery stroke of myosin II is initiated... Читать дальше...

Plos.org 

Evolutionary analyses of intrinsically disordered regions reveal widespread signals of conservation

by Marc D. Singleton, Michael B. Eisen

Intrinsically disordered regions (IDRs) are segments of proteins without stable three-dimensional structures. As this flexibility allows them to interact with diverse binding partners, IDRs play key roles in cell signaling and gene expression. Despite the prevalence and importance of IDRs in eukaryotic proteomes and various biological processes, associating them with specific molecular functions remains a significant challenge due to their high rates of sequence evolution. Читать дальше...

Plos.org 

Ecological drift during colonization drives within-host and between-host heterogeneity in an animal-associated symbiont

by Jason Z. Chen, Zeeyong Kwong, Nicole M. Gerardo, Nic M. Vega

Specialized host–microbe symbioses canonically show greater diversity than expected from simple models, both at the population level and within individual hosts. To understand how this heterogeneity arises, we utilize the squash bug, Anasa tristis, and its bacterial symbionts in the genus Caballeronia. We modulate symbiont bottleneck size and inoculum composition during colonization to demonstrate the significance of ecological drift... Читать дальше...




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