Motoyoshi Ikeda

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Observers inspected for different lengths of time pictures which contained high-resolution information within an eye-contingent viewing window and low-resolution information outside the area of that window. A recognition test followed in which the pictures inspected were presented together with other, distractor, pictures. The time required to reach 75%(More)
7 [1] The quasistationary summer Bering Sea circulation is 8 reconstructed as a variational inverse of the hydrographic 9 and atmospheric climatologies, transport estimates through 10 the Bering Strait, and surface drifter data. Our results 11 indicate the splitting of the Kamchatka Current in the 12 vicinity of the Shirshov Ridge. This branching is in 13(More)
In order to establish the luminous-efficiency function for mesopic vision of the standard observer, luminous efficiency functions were measured with the direct heterochromatic brightness-matching method at retinal illuminance in the range of -2-2 log photopic trolands in order to cover the scotopic, mesopic, and photopic conditions. A steady visual field of(More)
Wavelength-discrimination thresholds were measured with stimulus durations of 8, 500, and 2000 msec for test wavelengths of 420 to 630 nm at equal luminance of 100 Td. With the short duration of 8 msec, the discrimination thresholds increased for most wavelengths, but they decreased for the wavelengths near 460 nm. This short-duration(More)