Joetsu University of Education
Joetsu, Japan

Joetsu University of Education is a national university in Joetsu, Niigata, Japan, founded in 1978. Wikipedia.

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Matsumoto K.,Joetsu University of Education
Dynamical Systems | Year: 2017

λ-Graph systems are labelled Bratteli diagrams with shift operations. They present subshifts. Their matrix presentations are called symbolic matrix systems. We define skew products of λ-graph systems and study extensions of subshifts by finite groups. We prove that two canonical symbolic matrix systems are G-strong shift equivalent if and only if their presented subshifts are G-conjugate. © 2017 Informa UK Limited, trading as Taylor & Francis Group

Amano K.,Joetsu University of Education | Jenkins R.G.,Kanazawa University
Journal of Conchology | Year: 2017

Eleven protobranch species are described from deep-sea deposits of the Paleocene Katsuhira Formation. Among them, one nezv genus and three new species are included; Meganuculana n. gen., M. alleni n. sp., Neilonella alleni n. sp. and Tindaria paleocenica n. sp. Acila (Truncacila) hokkaidoensis, Pristigloma? sacltalinensis, Ezonuculana and Menneroctenia survived the End-Cretaceous Mass Extinction and became extinct by the end of Paleocene. Such a pattern of extinction is similar to that of the deep-sea benthonic foraminifers.

Amano K.,Joetsu University of Education | Kiel S.,University of Gottingen
Veliger | Year: 2011

The Cenozoic fossil record of the vesicomyid bivalve genus Adulomya in Japan is evaluated. Five of the nominal species are confirmed based on shell morphology, hinge dentition, and the shape of the pallial line. Two of these are new to science: Adulomya hamuroi sp. nov. from the uppermost lower or lowest middle Miocene Higashibessho Formation in Honshu, and Adulomya kuroiwaensis sp. nov. from the uppermost middle or lowest upper Miocene Ogaya Formation in Honshu. A well-preserved specimen of Adulomya uchimuraensis, the type species of Adulomya, shows that this species lacks a palliai sinus and has an elongate ovate posterior adductor muscle scar. We redescribe Adulomya chitanii based on well-preserved, newly collected material. The identity of specimens previously assigned to the latter two species is outlined. Adulomya appears to have dispersed during the early Miocene from western North America along the North Pacific continental slope to Japan. It is present with five species in early and middle Miocene strata of Japan and shows a steep decline in diversity through the late Miocene and Pliocene. This decline coincides with, and may thus be linked to, the appearance and diversification of the vesicomyid genera Archivesica and Calyptogena from the late Miocene onwards. In the waters around Japan today, species of Adulomya live in deeper water than other vesicomyids and might thus have followed the onshore-offshore trend as suggested for other members of the vent and seep fauna.

Kiel S.,University of Gottingen | Amano K.,Joetsu University of Education
Journal of Paleontology | Year: 2013

Bathymodiolin mussels are a group of bivalves associated with deep-sea hydrothermal vents and other reducing deep-sea habitats, and they have a particularly rich early Cenozoic fossil record in western Washington State, U.S.A. Here we recognize six species from middle Eocene to latest Oligocene deep-water methane seep deposits in western Washington. Two of them are new: Vulcanidas? goederti from the middle Eocene Humptulips Formation and Bathymodiolus (sensu lato) satsopensis from the late Oligocene part of the Lincoln Creek Formation. Very similar to the latter but more elongate are specimens from the early Oligocene Jansen Creek Member of the Makah Formation and are identified as B. (s.l.) aff. satsopensis. Bathymodiolus (s.l.) inouei Amano and Jenkins, 2011 is reported from the Lincoln Creek Formation. Idas? olympicus Kiel and Goedert, 2007 was previously known from late Eocene to Oligocene whale and wood falls in western Washington and is here reported from Oligocene seep deposits of the Makah and Pysht Formations. Vulcanidas? goederti occurs at a seep deposit from a paleodepth possibly as great as 2000 m, suggesting that its living relative, Vulcanidas insolatus Cosel and Marshall, 2010, which lives at depths of only 150-500 m, is derived from a deep-water ancestor. The bathymodiolins in western Washington indicate that the group originated at least in the middle Eocene and underwent a first diversification in the late Eocene to Oligocene. Early ontogenetic shells of all fossil species investigated so far, including the middle Eocene Vulcanidas? goederti, reflect planktotrophic larval development indicating that this developmental mode is an ancestral trait of bathymodiolins.Copyright © 2013, The Paleontological Society.

Yamamoto R.,Joetsu University of Education
Sleep and Biological Rhythms | Year: 2016

This paper reviews epidemiological findings on sleep problems among school-age children and discusses the current status and future directions of public health activities for ensuring adequate sleep. The main sleep problems for school-age children are delayed bedtimes caused by a change in the surrounding environment and resultant consequences related to sleep loss and irregular sleep–wake schedules. Health education activities and interventions aiming at improving certain environmental factors and behavioral changes have been conducted. However, some problems exist among current public health programs for ensuring adequate sleep. First, perspectives regarding physiological changes, accompanied by secondary sexual development, are lacking. Second, most existing public health activities for ensuring adequate sleep aim to disseminate knowledge and cannot achieve behavioral change. Finally, intervention perspectives within the parental and home environment are deficient. Considering such problems, the present review examines future directions for epidemiological studies on sleep problems among school-age children, with a specific emphasis on improving the effectiveness and efficacy of public health activities for ensuring adequate sleep. © 2016, Japanese Society of Sleep Research.

Amano K.,Joetsu University of Education | Jenkins R.G.,Kanazawa University
Paleontological Research | Year: 2014

We describe one new aporrhaid species, Kangilioptera inouei sp. nov., from the Paleocene Katsuhira Formation in Urahoro Town, eastern Hokkaido, Japan. This is the first record of a Cenozoic Aporrhaidae (Anchurinae) gastropod in Japan. Occurrences of Kangilioptera are confined to Paleocene deposits in western Greenland and Japan. With the addition of the bivalve Conchocele, the new find requires a reappraisal of the marine connection through the Bering Strait between Japan and Greenland during the Paleocene. © by the Palaeontological Society of Japan.

Amano K.,Joetsu University of Education | Little C.T.S.,University of Leeds
Acta Palaeontologica Polonica | Year: 2014

We describe three Miocene species of Provanna from Japan, two new and one in open nomenclature, that represent the only known fossil examples from whale-falls and a considerable increase in the Miocene diversity of the genus. Provanna hirokoae sp. nov. comes from the latest Middle Miocene Kuroiwa seep site in central Honshu. The shells of this species are mostly recrystallized, but contain relict crossed lamellar microstructures. Provanna alexi sp. nov. is from the early Middle Miocene Shosanbetsu whale-fall site in northwestern Hokkaido, and has well preserved shells comprising an outer simple prismatic layer and an inner crossed lamellar layer. The two Provanna specimens from the Middle Miocene Rekifune whale-fall site, in eastern Hokkaido, are preserved as external moulds only, so are left in open nomenclature. Based on current knowledge, the presence of an outer prismatic layer and an underlying crossed lamellar layer seems to be a common feature in the shells of Provanna, as well as in other genera belonging to the family Provannidae and the superfamily Abyssochrysoidea. Although the oldest occurrence of Provanna was in the Late Cretaceous, the genus did not spread geographically and ecologically until the Miocene (with four, or possibly five species), a date concordant with some molecular estimates. However, this could be an artefact of the fossil record because the known pre-Miocene seep and whale-falls are more geographically restricted than those from the Miocene. © 2014 K. Amano and C.T.S. Little.

Shiroma S.,Joetsu University of Education
Communications in Computer and Information Science | Year: 2013

This study examines the effectiveness of using a learning management system (LMS) for learning expressive actions in higher education. The author intended to use the LMS as a tool for students' self-reflection on their class experiences. Students in the course "Seminar on expression" were given writing assignments with the LMS. An analysis of the student essays showed that the students were able to reflect on their class experiences and improve their understanding of expressive actions. Specifically, through their essay writing using the LMS, they related changes in their way of thinking with regard to expressive actions with their class learning experiences. © Springer-Verlag Berlin Heidelberg 2013.

Amano K.,Joetsu University of Education | Kiel S.,University of Gottingen
Nautilus | Year: 2012

A new species of the bivalve family Vesicomyidae, Calyptogena veneriformis, is described from the Pliocene part of the Kurokura Formation in Niigata Prefecture, Japan. This species belongs to the Plio-Pleistocene Omma-Manganji fauna on the coast of the Japan Sea. We document previously unknown characters of the shell interior of "Vesicomya" kaicadai (Aoki) from lower to middle Miocene deposits in Honshu, Japan, showing that the species belongs to the genus Pliocardia. The genus Pliocardia might have a longer geologic history than previously appreciated. When the currently known distribution of Pliocardia is taken at face value, the genus might have colonized the Atlantic Ocean only very recently, perhaps as late as the Pliocene, despite its long geologic history.

Moriguchi Y.,Joetsu University of Education | Moriguchi Y.,Japan Science and Technology Agency | Hiraki K.,University of Tokyo | Hiraki K.,Japan Science and Technology Agency
Frontiers in Human Neuroscience | Year: 2013

Executive function (EF) refers to the higher-order cognitive control process for the attainment of a specific goal. There are several subcomponents of EF, such as inhibition, cognitive shifting, and working memory. Extensive neuroimaging research in adults has revealed that the lateral prefrontal cortex plays an important role in EF. Developmental studies have reported behavioral evidence showing that EF changes significantly during preschool years. However, the neural mechanism of EF in young children is still unclear. This article reviews recent near-infrared spectroscopy (NIRS) research that examined the relationship between the development of EF and the lateral prefrontal cortex. Specifically, this review focuses on inhibitory control, cognitive shifting, and working memory in young children. Research has consistently shown significant prefrontal activation during tasks in typically developed children, but this activation may be abnormal in children with developmental disorders. Finally, methodological issues and future directions are discussed. © 2013 Moriguchi and Hiraki.

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