Results 51 to 60 of about 445,381 (296)

Diagrammatic expansion for positive spectral functions beyond GW: Application to vertex corrections in the electron gas

open access: yes, 2014
We present a diagrammatic approach to construct self-energy approximations within many-body perturbation theory with positive spectral properties. The method cures the problem of negative spectral functions which arises from a straightforward inclusion ...
Pavlyukh, Y.   +3 more
core   +1 more source

Metformin promotes mitochondrial integrity through AMPK‐signaling in Leber's hereditary optic neuropathy

open access: yesFEBS Open Bio, EarlyView.
Metformin mediates mitochondrial quality control in Leber's hereditary optic neuropathy (LHON) fibroblasts carrying mtDNA mutations. At therapeutic levels, metformin activates AMPK signaling to restore mitochondrial dynamics by promoting fusion and restraining fission, while preserving mitochondrial mass, enhancing autophagy/mitophagy and biogenesis ...
Chatnapa Panusatid   +3 more
wiley   +1 more source

Simulation and Testing of Grapevine Branch Crushing and Collection Components

open access: yesAgriculture
Aiming at the problem of the low rate of resource utilization of large amounts of grape branch pruning and the high cost of leaving the garden, we design a kind of grape branch picking and crushing collection machine that integrates the collection of ...
Lei He   +4 more
doaj   +1 more source

Phase Transitions of the Typical Algorithmic Complexity of the Random Satisfiability Problem Studied with Linear Programming

open access: yes, 2018
Here we study the NP-complete $K$-SAT problem. Although the worst-case complexity of NP-complete problems is conjectured to be exponential, there exist parametrized random ensembles of problems where solutions can typically be found in polynomial time ...
Bleim, Roman   +2 more
core   +2 more sources

Sustainable bioplastics manufacturing from renewable sources

open access: yesFEBS Open Bio, EarlyView.
Bioplastics are manufactured by using polymers from different bio‐based sources. These novel materials not only offer biodegradability but also possess various functional properties that make them suitable for diverse applications. Recent developments in the preparation of bioplastics are reported, highlighting the distinct properties of each type of ...
C. Valeria L. Giosafatto   +6 more
wiley   +1 more source

Foreword [PDF]

open access: yes, 2016
This Foreword provides an overview of Criminal Behavior and the Brain: When Law and Neuroscience Collide, a symposium hosted by the Fordham Law Review and cosponsored by the Fordham Law School Neuroscience and Law Center. While the field of neuroscience
Denno, Deborah W.
core   +1 more source

Density-operator evolution: Complete positivity and the Keldysh real-time expansion

open access: yes, 2019
We study the reduced time-evolution of open quantum systems by combining quantum-information and statistical field theory. Inspired by prior work [EPL 102, 60001 (2013) and Phys. Rev. Lett.
Reimer, V., Wegewijs, M. R.
core   +1 more source

Meta‐analysis fails to show any correlation between protein abundance and ubiquitination changes

open access: yesFEBS Open Bio, EarlyView.
We analyzed over 50 published proteomics datasets to explore the relationship between protein levels and ubiquitination changes across multiple experimental conditions and biological systems. Although ubiquitination is often associated with protein degradation, our analysis shows that changes in ubiquitination do not globally correlate with changes in ...
Nerea Osinalde   +3 more
wiley   +1 more source

Finite Element Explicit Dynamics Simulation of an Impact Cutting Mechanism Analysis of Populus tomentosa Branches

open access: yesBioResources
The branch impact failure mechanism has gradually received attention from scholars, along with the application of impact cutting methods in plantation forest pruning.
Shihong Ba   +5 more
doaj   +2 more sources

Finding Minimal Cost Herbrand Models with Branch-Cut-and-Price

open access: yes, 2018
Given (1) a set of clauses $T$ in some first-order language $\cal L$ and (2) a cost function $c : B_{{\cal L}} \rightarrow \mathbb{R}_{+}$, mapping each ground atom in the Herbrand base $B_{{\cal L}}$ to a non-negative real, then the problem of finding a
Cussens, James
core   +1 more source

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