83 citations · 132 across the 6 of their papers we have counts for
6 papers
The spatial distribution of impact craters on Ryugu
Naoyuki Hirata, Tomokatsu Morota, Yuichiro Cho +40
Asteroid 162173 Ryugu has numerous craters. The initial measurement of impact craters on Ryugu, by Sugita et al. (2019), is based on Hayabusa2 ONC images obtained during the first…
Rotational effect as the possible cause of the east-west asymmetric crater rims on Ryugu observed by LIDAR data
Naoyuki Hirata, Noriyuki Namiki, Fumi Yoshida +13
Asteroid 162173 Ryugu is a rubble-pile asteroid, whose top-shape is compatible with models of deformation by spin up. Rims of major craters on Ryugu have an east-west asymmetric pr…
Angle of repose of Martian wet sand using discrete element method: Implication for the seasonal cycle of recurring slope lineae(RSL) by relative humidity
Daigo Shoji, Shoko Imamura, Maya Nakamura +1
Seasonal cycle of Martian relative humidity shows that, in the southern and the northern RSL sites, humidity decreases when RSL increment while humidity is high on the fading seaso…
Classification of volcanic ash particles using a convolutional neural network and probability
Daigo Shoji, Rina Noguchi, Shizuka Otsuki +1
Analyses of volcanic ash are typically performed either by qualitatively classifying ash particles by eye or by quantitatively parameterizing its shape and texture. While complex s…
New classification method of volcanic ash samples using statistically determined grain types
Rina Noguchi, Hideitsu Hino, Nobuo Geshi +2
We developed a method to classify volcanic ash samples by introducing statistically determined grain types. Using more than 10,000 numbers of automatically measured grain data (par…
Shape recognition of volcanic ash by simple convolutional neural network
Daigo Shoji, Rina Noguchi
Shape analyses of tephra grains result in understanding eruption mechanism of volcanoes. However, we have to define and select parameter set such as convexity for the precise discr…