Abstract Recent eruptions of the Shinmoedake volcano, Japan, have provided a valuable opportunity to investigate transition between explosive and effusive eruptions. In October 2017, phreatic/phreatomagmatic explosions occurred. They were followed in March 2018 by phase hybrid activity with simultaneous lava flows then intermittent, Vulcanian-style explosions. Evolution surface phenomena, tempo...

Pumice rafts are considered to be a long-range drifting agent that promotes material exchange and the dispersal of marine species. Large ones can also interfere with vessel navigation have negative impact on social economy ecosystems. Synoptic observations from Multispectral Instrument (MSI) on-board Sentinel-2, spatial resolution up 10 m, provide an excellent means monitor track pumice rafts. ...

in this study, the removal of as (v) from water resources by using aluminum-coated pumice as a new adsorbent was assessed. the features of the adsorbent coating layer were observed by x-ray diffraction (xrd) and scanning electron microscopy (sem).the effects of various parameters such as adsorbent doses, ph, contact time, arsenate initial concentration and interfering ions in arsenic adsorpt...

in this study, the removal of as (v) from water resources by using aluminum-coated pumice as a new adsorbent was assessed. the features of the adsorbent coating layer were observed by x-ray diffraction (xrd) and scanning electron microscopy (sem).the effects of various parameters such as adsorbent doses, ph, contact time, arsenate initial concentration and interfering ions in arsenic adsorption...

We analyze a well known type of puzzle in planar geometry: given a planar shape, it is required to find a cut that divides the shape into two identical parts (up to rotation and translation). Clearly not all shapes can be so dissected and for some shapes that appear in puzzles the cutting curve is quite surprising and difficult to find. In this paper we first analyze the inverse problem of asse...

The 2021 eruption of Fukutoku-Oka-no-Ba (FOB) in the northwest Pacific on 13 August produced a large volume pumice that drifted westward for ~1300 km to Nansei Islands, Japan, and some extent. In February 2022, with similar characteristics FOB was deposited along Gulf Thailand. clasts Songkhla Province, Thailand, were fine-grained <4 cm size rounded. Most consisted clinopyroxene, plagioclase (a...