Sungkyunkwan University

About: Sungkyunkwan University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Thin film & Graphene. The organization has 28229 authors who have published 56428 publications receiving 1352733 citations. The organization is also known as: 성균관대학교.

Measurement of the differential cross section for top quark pair production in pp collisions at √s=8 TeV

Abstract: The normalized differential cross section for top quark pair (tt) production is measured in pp collisions at a centre-of-mass energy of 8TeV at the CERN LHC using the CMS detector in data corresponding to an integrated luminosity of 19.7fb^(−1). The measurements are performed in the lepton+jets (e/μ +jets) and in the dilepton (e^+e^−, μ^+μ^−, and e^±μ^∓) decay channels. The tt cross section is measured as a function of the kinematic properties of the charged leptons, the jets associated to b quarks, the top quarks, and the tt system. The data are compared with several predictions from perturbative quantum chromodynamic up to approximate next-to-next-to-leading-order precision. No significant deviations are observed relative to the standard model predictions.

Beyond European Welfare Regimes: Comparative Perspectives on East Asian Welfare Systems

Abstract: This article examines three comparative perspectives on East Asian welfare systems with special reference to Japan and Korea. First, an expenditure approach shows that the levels of government spending in Japan and Korea are lower than in UK and Sweden, but it necessarily underestimates the welfare expenditure publicly spent in Japan and Korea, due to the regulator type of policy intervention in financing welfare programmes. Second, the standard analysis of cross-sectional redistribution shows that social and fiscal policies have made only a small impact on income distribution, but the profiles of policy intervention reveal the distinctive characteristics of social security systems in these two countries. Lastly, this article examines the welfare systems in Japan and Korea in the light of Esping-Andersen's conservative welfare regime type. It argues that the welfare systems in these two countries do not fit into the type of the conservative welfare state and suggests that there is a case for an ‘East Asian welfare model’, at least regarding Japan and Korea.

2D Graphene Oxide Nanosheets as an Adhesive Over-Coating Layer for Flexible Transparent Conductive Electrodes

Abstract: 2D Graphene Oxide Nanosheets as an Adhesive Over-Coating Layer for Flexible Transparent Conductive Electrodes

FtsW is a peptidoglycan polymerase that is functional only in complex with its cognate penicillin-binding protein.

Abstract: The peptidoglycan cell wall is essential for the survival and morphogenesis of bacteria1. For decades, it was thought that only class A penicillin-binding proteins (PBPs) and related enzymes effected peptidoglycan synthesis. Recently, it was shown that RodA-a member of the unrelated SEDS protein family-also acts as a peptidoglycan polymerase2-4. Not all bacteria require RodA for growth; however, its homologue, FtsW, is a core member of the divisome complex that appears to be universally essential for septal cell wall assembly5,6. FtsW was previously proposed to translocate the peptidoglycan precursor lipid II across the cytoplasmic membrane7,8. Here, we report that purified FtsW polymerizes lipid II into peptidoglycan, but show that its polymerase activity requires complex formation with its partner class B PBP. We further demonstrate that the polymerase activity of FtsW is required for its function in vivo. Thus, our findings establish FtsW as a peptidoglycan polymerase that works with its cognate class B PBP to produce septal peptidoglycan during cell division.

Flow-enhanced solution printing of all-polymer solar cells

Abstract: Morphology control of solution coated solar cell materials presents a key challenge limiting their device performance and commercial viability. Here we present a new concept for controlling phase separation during solution printing using an all-polymer bulk heterojunction solar cell as a model system. The key aspect of our method lies in the design of fluid flow using a microstructured printing blade, on the basis of the hypothesis of flow-induced polymer crystallization. Our flow design resulted in a ∼90% increase in the donor thin film crystallinity and reduced microphase separated donor and acceptor domain sizes. The improved morphology enhanced all metrics of solar cell device performance across various printing conditions, specifically leading to higher short-circuit current, fill factor, open circuit voltage and significantly reduced device-to-device variation. We expect our design concept to have broad applications beyond all-polymer solar cells because of its simplicity and versatility.