878 research outputs found
Domain Nucleation and Annihilation in Uniformly Magnetized State under Current Pulses in Narrow Ferromagnetic Wires
We investigate the current-driven magnetization dynamics in narrow Permalloy
wires by means of Lorentz microscopy and electron holography. Current pulses
are found to transform the magnetic structure in the uniformly magnetized state
below the Curie temperature. A variety of magnetic states including reversed
magnetic domains are randomly obtained in low probability. The dynamics of
vortices found in most of observed magnetic states seems to play a key role in
triggering the magnetization reversal.Comment: 11 pages, 3 figures, 1 video, to appear in Japanese Journal of
Applied Physics (Express Letter
The effect of variations in structure on the basicity of certain esters, ketones, ethers, and alcohols
More on the Burkhardt-Cottingham Sum Rule in QCD
The QCD higher order effects to the polarized structure function are reanalyzed for massive quarks in the context of the operator product
expansion. We confirm that the lowest moment of which
corresponds to the Burkhardt-Cottingham sum rule does {\sl not} suffer from
radiative corrections in perturbative QCD.Comment: LaTeX, 9 pages, 1 figure appended after \end{document} as an
uu-encoded and compressed .ps file, KUCP-70;HUPD-9410;YNU-HEPTh-94-10
Pharmacological Characteristics and Clinical Applications of K201
K201 is a 1,4-benzothiazepine derivative that is a promising new drug with a strong cardioprotective effect. We initially discovered K201 as an effective suppressant of sudden cardiac cell death due to calcium overload. K201 is a nonspecific blocker of sodium, potassium and calcium channels, and its cardioprotective effect is more marked than those of nicorandil, prazosine, propranolol, verapamil and diltiazem. Recently, K201 has also been shown to have activities indicated for treatment of atrial fibrillation, ventricular fibrillation, heart failure and ischemic heart disease, including action as a multiple-channel blocker, inhibition of diastolic Ca2+ release from the sarcoplasmic reticulum, suppression of spontaneous Ca2+ sparks and Ca2+ waves, blockage of annexin V and provision of myocardial protection, and improvement of norepinephrine-induced diastolic dysfunction. Here, we describe the pharmacological characteristics and clinical applications of K201
Mass effects in the polarized virtual photon structure
We discuss target mass effects in the polarized virtual photon structure
functions , for the kinematic
region , where is the mass squared of
the probe (target) photon. We obtain the expressions for the structure
functions in closed form by inverting the Nachtmann moments for the twist-2 and
twist-3 operators. Numerical analysis shows that target mass effects appear at
large and become sizable near the maximal value of , as the ratio
increases. Target mass effects for the QCD sum rules of
and are also investigated.Comment: 5 pages, LaTeX, 4 eps figures, npb.sty file included, Talk given at
Loops and Legs 2004, Zinnowitz, Germany, April 25-30, 2004, to appear in the
Proceeding
Path factors in claw-free graphs
AbstractA graph G is called claw-free if G has no induced subgraph isomorphic to K1,3. We prove that if G is a claw-free graph with minimum degree at least d, then G has a path factor such that the order of each path is at least d+1
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