Shigeharu Yaginuma

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This paper presents the following recent investigations of transparent amorphous-oxide semiconductors (TAOS) from materials to devices and circuits. 1) Composition of metals in TAOS are widely explored with the aim of seeking semiconductors suitable for the channel layers of thin-film transistors (TFTs) composing backplanes for flat-panel displays. It is(More)
The acquisition of discrimination of five pairs of pattern cues in a Wisconsin General Testing Apparatus by 223 naive macaque monkeys was compared. The pairs of discriminanda were identical in configuration but varied slightly in either the size of the cue or the size of the background plaque; thus, the degree of separation of the cue from the fringe of the(More)
PURPOSE To investigate corneal astigmatism in children with congenital cataract before surgery. MATERIALS AND METHODS We retrospectively reviewed the charts of 99 eyes of 62 patients (74 paired eyes and 25 single eyes) who had undergone congenital cataract surgery from March, 2000 to April, 2012. The mean age at surgery was 32.1 +/- 26.9 months. All eyes(More)
An attempt was made to elucidate the nature and neural basis of the elevated discrimination limen for visual stimuli of reduced sizes that had been discovered earlier in monkeys with inferotemporal lesions. Although anterior inferotemporal damage was found to have only negligible effect, both total inferotemporal and posterior inferotemporal lesions yielded(More)
To investigate the nature underlying the process of pattern discrimination learning, a series of seven experiments on seven working assumptions were undertaken. The main findings are as follows. The pattern discrimination learning consists of two time-dependent stages: The initial or first learning stage is the period of performance at chance, and the(More)
PURPOSE To evaluate the efficacy of intraoperative optical coherence tomography (OCT) during vitrectomy for acute endophthalmitis. METHODS The intraoperative and postoperative images of an 87-year-old woman with acute endophthalmitis after uncomplicated cataract surgery were analyzed. RESULTS At presentation, the vision of the patient was 20/2000, and(More)
In order to elucidate the nature of the effect of small cue-response separations on pattern discriminations by monkeys, three studies were performed. When training on a pattern discrimination with a cue-response separation was discontinued during performance at the chance level, there was no saving on the rate of learning a second task (with identical cues(More)
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