First-order phase transition in the tethered surface model on a sphere

We show that the tethered surface model of Helfrich and Polyakov-Kleinert undergoes a first-order phase transition separating the smooth phase from the crumpled one. The model is investigated by the canonical Monte Carlo simulations on spherical and fixed connectivity surfaces of size up to N=15212. The first-order transition is observed when N>7000, which is larger than those in previous numerical studies, and a continuous transition can also be observed on small-sized surfaces. Our results are, therefore, consistent with those obtained in previous studies on the phase structure of the model.Comment: 6 pages with 7 figure

マイクロレンズを利用したYAG高調波による微細加工

金沢大学理工研究域機械工学系レーザ加工において困難である金属への種々形状微細除去加工を，本研究では種々形状のマイクロレンズを製作，利用することによって可能としている．アクリル樹脂にEr:YAGレーザを走査させることによりマイクロレンズを製作し，このレンズを用いてNd:YAGレーザ第２高調波を試料表面に集光させて加工を行う．さらに，ヘリンボーンと呼ばれる微細構造をクロム鋼表面に加工した後，摩擦特性へ与える影響について検討する.出版者照会後に全文公

Outcomes in Newly Diagnosed Atrial Fibrillation and History of Acute Coronary Syndromes: Insights from GARFIELD-AF

BACKGROUND: Many patients with atrial fibrillation have concomitant coronary artery disease with or without acute coronary syndromes and are in need of additional antithrombotic therapy. There are few data on the long-term clinical outcome of atrial fibrillation patients with a history of acute coronary syndrome. This is a 2-year study of atrial fibrillation patients with or without a history of acute coronary syndromes