Dynamic modification of sphingomyelin in lipid microdomains controls development of obesity, fatty liver, and type 2 diabetes

Susumu Mitsutake, Kota Zama, Hazuki Yokota, Tetsuya Yoshida, Miki Tanaka, Masaru Mitsui, Masahito Ikawa, Masaru Okabe, Yoshikazu Tanaka, Tadashi Yamashita, Hiroshi Takemoto, Toshiro Okazaki, Ken Watanabe, Yasuyuki Igarashi, Dynamic Modification of Sphingomyelin in Lipid Microdomains Controls Development of Obesity, Fatty Liver, and Type 2 Diabetes, Journal of Biological Chemistry, Volume 286, Issue 32, 2011, Pages 28544-28555, ISSN 0021-9258, https://doi.org/10.1074/jbc.M111.255646

Bond Operator Mean Field Approach to the Magnetization Plateaux in Quantum Antiferromagnets -- Application to the S=1/2 Coupled Dimerized Zigzag Heisenberg Chains

The magnetization plateaux in two dimensionally coupled S=1/2 dimerized zigzag Heisenberg chains are investigated by means of the bond operator mean field approximation. In the absence of the interchain coupling, this model is known to have a plateau at half of the saturation magnetization accompanied by the spontanuous translational symmetry breakdown. The parameter regime in which the plateau appears is reproduced well within the present approximation. In the presence of the interchain coupling, this plateau is shown to be suppressed. This result is also supported by the numerical diagonalization calculation.Comment: 7 pages, 8 figure

Stripe orders in the extended Hubbard model

We study stripe orders of charge and spin density waves in the extended Hubbard model with the nearest-neighbor Coulomb repulsion V within the mean field approximation. We obtain V vs. T(temperature) phase diagram for the on-site Coulomb interaction U/t=8.0 and the filling n=0.8, here t is a nearest-neighbor transfer energy. Our result shows that the diagonal stripe spin density wave state (SDW) is stable for small V, but for large V the most stable state changes to a charge density wave-antiferromagnetic (CDW-AF) state. Especially we find at low temperature and for a certain range of value of V, a vertical stripe CDW-AF state becomes stable.Comment: LaTeX 9 pages, 17 figures, uses jpsj.st

Introducing E-learning to Lower Level Learners of English: A Preliminary Study

本稿は大学の授業における下位英語学習者へのe-learning 教材導入の有効性及びその効 果的活用方法を検証し考察するものである。E-learning導入後のTOEICスコア変化と自律 学習アンケート結果を、統制群を用いて比較検証した。その結果、distance learning モデ ルである実験群では、TOEIC スコアに大きな伸びがみられたが、GTEC テストを用いた統 制群では、実験群のような著しい伸びは認められなかった。また、実験群では自律学習の アンケート結果から「意識要因」のMotivation とIdeal-Self の値が微増していることが分 かった。本研究は学内COE 教育支援経費を受けての予備調査であるものの、教員の適切な 指導と助言があれば、下位英語学習者へのdistance learning モデルにおいて効果的に e-learning教材が活用出来ることを示唆している

Search for gravitational waves associated with the InterPlanetary Network short gamma ray bursts

We outline the scientific motivation behind a search for gravitational waves associated with short gamma ray bursts detected by the InterPlanetary Network (IPN) during LIGO's fifth science run and Virgo's first science run. The IPN localisation of short gamma ray bursts is limited to extended error boxes of different shapes and sizes and a search on these error boxes poses a series of challenges for data analysis. We will discuss these challenges and outline the methods to optimise the search over these error boxes.Comment: Methods paper; Proceedings for Eduardo Amaldi 9 Conference on Gravitational Waves, July 2011, Cardiff, U