Precision boson-jet azimuthal decorrelation at hadron colliders

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An Oscillatory Contractile Pole-Force Component Dominates the Traction Forces Exerted by Migrating Amoeboid Cells

We used principal component analysis to dissect the mechanics of chemotaxis of amoeboid cells into a reduced set of dominant components of cellular traction forces and shape changes. The dominant traction force component in wild-type cells accounted for ~40% of the mechanical work performed by these cells, and consisted of the cell attaching at front and back contracting the substrate towards its centroid (pole-force). The time evolution of this pole-force component was responsible for the periodic variations of cell length and strain energy that the cells underwent during migration. We identified four additional canonical components, reproducible from cell to cell, overall accounting for an additional ~20% of mechanical work, and associated with events such as lateral protrusion of pseudopodia. We analyzed mutant strains with contractility defects to quantify the role that non-muscle Myosin II (MyoII) plays in amoeboid motility. In MyoII essential light chain null cells the polar-force component remained dominant. On the other hand, MyoII heavy chain null cells exhibited a different dominant traction force component, with a marked increase in lateral contractile forces, suggesting that cortical contractility and/or enhanced lateral adhesions are important for motility in this cell line. By compressing the mechanics of chemotaxing cells into a reduced set of temporally-resolved degrees of freedom, the present study may contribute to refined models of cell migration that incorporate cell-substrate interactions

Genome-wide association study of lung adenocarcinoma in East Asia and comparison with a European population

Lung adenocarcinoma is the most common type of lung cancer. Known risk variants explain only a small fraction of lung adenocarcinoma heritability. Here, we conducted a two-stage genome-wide association study of lung adenocarcinoma of East Asian ancestry (21,658 cases and 150,676 controls; 54.5% never-smokers) and identified 12 novel susceptibility variants, bringing the total number to 28 at 25 independent loci. Transcriptome-wide association analyses together with colocalization studies using a Taiwanese lung expression quantitative trait loci dataset (n = 115) identified novel candidate genes, including FADS1 at 11q12 and ELF5 at 11p13. In a multi-ancestry meta-analysis of East Asian and European studies, four loci were identified at 2p11, 4q32, 16q23, and 18q12. At the same time, most of our findings in East Asian populations showed no evidence of association in European populations. In our studies drawn from East Asian populations, a polygenic risk score based on the 25 loci had a stronger association in never-smokers vs. individuals with a history of smoking (Pinteraction = 0.0058). These findings provide new insights into the etiology of lung adenocarcinoma in individuals from East Asian populations, which could be important in developing translational applications

A cubic Hermite finite element-continuation method for numerical solutions of the von Karman equations

We study a cubic Hermite finite element method for numerical solutions of the von Karman equations defined in a rectangular domain with totally clamped boundary conditions. A novel iterative method combined with a predictor-corrector continuation algorithm is exploited to trace solution curves of the von Karman equations. The fourth order finite element approximations compute accurate numerical solutions for the deformation and the Airy stress function as well as their first order partial derivatives and the mixed second order partial derivatives. In this regard, the classical predictor-corrector continuation method is interpreted in a different way. Our numerical results show that the bifurcation scenario of the von Karman equations with totally clamped boundary conditions is different from those with simply supported and partially clamped boundary conditions. (C) 2008 Elsevier Inc. All rights reserved

Classifier modeling and numerical taxonomy of Actinidia (Actinidiaceae) in Taiwan

Although kiwifruit (Actinidia) is popular worldwide, its complex morphology has resulted in long-standing confusion regarding its nomenclature, classification, and identification. In an attempt to resolve this issue, we conducted a phylogenetic analysis on 72 wild Actinidia accessions in Taiwan. We used 60 morphological characters as taxonomic traits to construct a seriated heat map that revealed A. callosa var. ephippioidea and A. rufa (sensu Flora of Taiwan, 2(nd) Edition) as introgressive hybrids between A. chinensis var. setosa and A. callosa (sensu Flora of Taiwan, 2(nd) Edition), as well as five significant groups of Actinida in Taiwan. Based on these results, we coded the indicator response matrix for the logistic regression models as dichotomizers and used a Bayesian discriminant model as a polychotomizer. After classifier modeling, the two classifiers were combined to identify Actinidia specimens in domestic and international herbaria. As a result, a taxonomic revision was made: A. callosa var. callosa and A. callosa var. ephippioidea were revised as A. rufa; A. rubricaulis was revised as A. callosa var. discolor; A. chinensis var. setosa was elevated to A. setosa; and A. tetramera was a misidentification of A. arguta. Of these, only A. setosa is endemic to Taiwan

Linear Interference Suppression with Covariance Mismatches in MIMO-OFDM Downlink

International audienc

SINR Enhancement of Interference Rejection Combining for the MIMO Interference Channel

International audienc