Nobuto Nakanishi

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[Formula: see text] -doped ZnO crystals including inversion boundaries were investigated by high-resolution high-angle annular-dark field (HAADF) scanning transmission electron microscopy (STEM). The images were analysed with the aid of the image simulation based on Bethe method and also the retrieval processing using deconvolution. Utility of these two(More)
Atomic resolution low-angle bright-field (LABF) scanning transmission electron-microscope (STEM) images and high-angle bright-field (HABF) STEM images of [011]-orientated Si have been experimentally obtained together with high-angle annular dark-field (HAADF) STEM images. The contrast formation mechanisms of the LABF STEM and HABF STEM images are examined(More)
A deconvolution processing of high-resolution high-angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) images, combined with maximum entropy method, is applied to two experimental [0 11]-Si images; one having unresolved dumbbells and the other having resolved dumbbells and artificial bright spots. The deconvoluted images for(More)
A different scheme for high-angle annular dark-field scanning transmission electron microscopy image calculation of multilayers, such as a crystal covered by amorphous films, has been developed, in which intensities of electrons collected by an annular detector at each layer are evaluated by two kinds of optical potential for thermal diffuse scattering on(More)
An expanded use of the maximum entropy method (MEM) is suggested to reduce noise from an experimental high-angle annular dark-field (HAADF) scanning transmission electron microscope (STEM) image. The MEM is combined with an estimate of the standard deviation of noise from an experimental HAADF STEM image and low-pass filtering using the information limit(More)
A process for retrieving experimental high-resolution high-angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) images, which are systematically distorted by environmental and/or instrumental instability in addition to the convolution influence of the probe, is demonstrated using a HAADF-STEM image of an antimony-rich basal(More)
OBJECTIVES Limited data are available regarding the predictive value of electrocardiographic T wave inversion in lead aVL for mid-segment left anterior descending (MLAD) lesions among patients with acute coronary syndrome (ACS). SETTING Retrospective single-centre study, using a prospectively-collected coronary angiography database from January 2012 to(More)
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