نتایج جستجو برای: hmc

تعداد نتایج: 1106  

2006
Christopher R. Sweet Scott S. Hampton Robert D. Skeel Jesús A. Izaguirre

Hybrid Monte Carlo (HMC) is a rigorous sampling method that uses molecular dynamics as a global Monte Carlo move. The acceptance rate of HMC decays exponentially with system size. The Shadow Hybrid Monte Carlo (SHMC) was previously introduced to overcome this performance degradation by sampling instead from the shadow Hamiltonian defined for MD when using a symplectic integrator. We show that S...

Journal: :The Journal of biological chemistry 2004
Petra Kempná Elke Reiter Michel Arock Angelo Azzi Jean-Marc Zingg

The effects of four natural tocopherols on the proliferation and signaling pathways were examined in the human mastocytoma cell line (HMC-1). The four tocopherols inhibited HMC-1 cell proliferation with different potency (delta > alpha = gamma > beta). Growth inhibition correlated with the reduction of PKB (protein kinase B) phosphorylation by the different tocopherols. The reduction of PKB pho...

Journal: :AJNR. American journal of neuroradiology 2007
M Caulo C Briganti P A Mattei B Perfetti A Ferretti G L Romani A Tartaro C Colosimo

BACKGROUND AND PURPOSE The hand motor cortex (HMC) has been classically described as having an omega or epsilon shape in axial-plane images obtained with CT and MR imaging. The aim of this study was to use MR imaging and Talairach normalization in a large sample population that was homogeneous for age and handedness to evaluate in a sex model a new classification with 5 morphologic variants of ...

2013
Ming-Luan Chen Fan Shen Wei Huang Jia-Hui Qi Yinsheng Wang Yu-Qi Feng Song-Mei Liu Bi-Feng Yuan

BACKGROUND: 5-Methylcytosine (5-mC) is an important epigenetic modification involved in development and is frequently altered in cancer. 5-mC can be enzymatically converted to 5-hydroxymethylcytosine (5hmC). 5-hmC modifications are known to be prevalent in DNA of embryonic stem cells and neurons, but the distribution of 5-hmC in human liver tumor and matched control tissues has not been rigorou...

2001
B. Joó

We discuss an instability in the leapfrog integration algorithm, widely used in current Hybrid Monte Carlo (HMC) simulations of lattice QCD. We demonstrate the instability in the simple harmonic oscillator (SHO) system where it is manifest. We demonstrate the instability in HMC simulations of lattice QCD with dynamical Wilson-Clover fermions and discuss implications for future simulations of la...

Journal: :Human machine communication journal 2023

This introduction to the volume discusses evolving field of Human-Machine Communication (HMC), drawing on insights from philosophy science. We explore critical debates in field, underscoring importance challenging assumptions, embracing interfield work, and fostering dialogue shaping our understanding HMC. Moreover, we celebrate vibrant collaboration between disciplines that drives progress pie...

Journal: :Neurobiology of Aging 2013
Leonidas Chouliaras Diego Mastroeni Elaine Delvaux Andrew Grover Gunter Kenis Patrick R. Hof Harry W.M. Steinbusch Paul D. Coleman Bart P.F. Rutten Daniel L.A. van den Hove

Epigenetic dysregulation of gene expression is thought to be critically involved in the pathophysiology of Alzheimer's disease (AD). Recent studies indicate that DNA methylation and DNA hydroxymethylation are 2 important epigenetic mechanisms that regulate gene expression in the aging brain. However, very little is known about the levels of markers of DNA methylation and hydroxymethylation in t...

Journal: :Peritoneal dialysis international : journal of the International Society for Peritoneal Dialysis 1999
S Mandl-Weber B Haslinger T Sitter

OBJECTIVE To determine the influence of thrombin, which is generated intraperitoneally during peritoneal dialysis, on the synthesis of fibrinolytic system components in human peritoneal mesothelial cells (HMC). METHODS Confluently grown HMC, isolated from the omental tissue, were used in the experiments. Conditioned media were obtained by incubating cells with serum-free M199 containing the a...

2017
Mengzhe Guo Xiao Li Liyan Zhang Dantong Liu Wencheng Du Dengyang Yin Nan Lyu Guangyu Zhao Cheng Guo Daoquan Tang

The DNA demethylation pathway has been discovered to play a significant role in DNA epigenetics. This pathway removes the methyl group from cytosine, which is involved in the oxidation of 5-methylcytosine to 5-hydroxymethylcytosine (5-hmC) by ten-eleven translocation (TET) proteins. Then, 5-hmC can be iteratively oxidized to generate 5-formylcytosine (5-foC) and 5-carboxylcytosine (5-caC). Howe...

Journal: :Journal of radiation research 2008
Fumiaki Nakayama Kerstin Müller Akiko Hagiwara Roland Ridi Makoto Akashi Viktor Meineke

Several fibroblast growth factors (FGFs) are able to reduce and improve radiation-induced tissue damage through the activation of surface fibroblast growth factor receptors (FGFRs). In contrast, some FGFs lack classical signal sequences, which play roles in the release of FGFs, and the intracellular function of these FGFs is not well clarified. In this study, we evaluated the transcript levels ...

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