2,597 research outputs found
29. Yamakawa Hitoshi (1880-1958)
No full textIwao Seiichi, Iyanaga Teizō, Ishii Susumu, Yoshida Shōichirō, Fujimura Jun'ichirō, Fujimura Michio, Yoshikawa Itsuji, Akiyama Terukazu, Iyanaga Shōkichi, Matsubara Hideichi. 29. Yamakawa Hitoshi (1880-1958). In: Dictionnaire historique du Japon, volume 20, 1995. Lettres U, V, W, X, Y et Z. pp. 71-72
Biogenically induced bedded chert formation in the alkaline palaeo-lake of the Green River Formation
No full textRhythmically bedded cherts are observed in both pelagic marine and lacustrine deposits, but the formation mechanism in the latter remains highly uncertain. Our study of alternating chert–dolomite beds in the Eocene Green River Formation, Utah, USA reveals dense accumulations of organic-matter spheres (30–50 μm diameter) of probable algal cyst origin in the chert layers, and centennial- to millennial-scale periodicities in chert layer deposition. A positive correlation between the degree of degradation of the organic spheres and Si distribution implies decomposition of algal organic matter lead to precipitation of lacustrine chert. As both alkalinity and dissolved silica were likely high in the palaeo-lake waters of the Green River Formation, we hypothesize that decomposition of algal organic matter lowered the pH of sediment pore waters and caused silica precipitation. We propose a formation model in which the initial abundance of algal organic matter in sediment varies with productivity at the lake surface, and the decomposition of this algal matter controls the extent of silica precipitation in sediment. The formation of rhythmically bedded chert–dolomite may be linked to centennial- to millennial-scale climatic/environmental factors that modulate algal productivity, which are possibly tied to solar activity cycles known to have similar periodicities
Matter power spectrum in hidden neutrino interacting dark matter models: a closer look at the collision term
No full textDark Matter (DM) models providing possible alternative solutions to the smallscale crisis of the standard cosmology are nowadays of growing interest. We consider DM interacting with light hidden fermions via well-motivated fundamental operators showing the resultant, matter power spectrum is suppressed on subgalactic scales within a plausible parameter region. Our basic description of the evolution of cosmological perturbations relies on a fully consistent first principles derivation of a perturbed Fokker-Planck type equation, generalizing existing literature. The cosmological perturbation of the Fokker-Planck equation is presented for the first time in two different gauges, where the results transform into each other according to the rules of gauge transformation. Furthermore, our focus lies on a, derivation of a broadly applicable and easily computable collision term showing important phenomenological differences to other existing approximations. As one of the Main results and concerning the small-scale crisis, we show the equal importance of vector and scalar boson mediated interactions between the DM and the light fermions
Slope efficiency characteristics of mode-hop driven tunable single-mode cholesteric liquid crystal laser
No full textSPIE Photonic Devices + Applications, 2011, San Diego, California, United StatesYo Inoue, Hiroyuki Yoshida, Kenta Inoue, Yusuke Shiozaki, Hitoshi Kubo, Akihiko Fujii, and Masanori Ozaki "Slope efficiency characteristics of mode-hop driven tunable single-mode cholesteric liquid crystal laser", Proc. SPIE 8114, Liquid Crystals XV, 811415 (7 September 2011). DOI: https://doi.org/10.1117/12.893208We report tunable single-mode lasing with an improved slope efficiency from a cholesteric liquid crystal (ChLC) cavity with a three-layered structure. The device consists of one photopolymerized ChLC layer with a wide reflection band, another ChLC layer with a notch reflection band and a Rhodamine-6G-doped ionic liquid layer acting as the gain medium. Single-mode lasing can be obtained in this device structure because the ChLC layer with the notch reflection band strongly reflects only one of the Fabry-Perot cavity modes. Tuning of the lasing wavelength is achieved by tuning the reflection band of the notch ChLC. The device showed a maximum slope efficiency of 16%, which was found to be approximately 1.5 times larger than that of ordinary ChLC lasers doped with the pyrromethene 597 laser dye
サンサ シンケイ リョウイキ ヘノ カプサイシン シゲキ ニ ヨル シンガイ ジュヨウ ニ タイスル エストロゲン ノ エイキョウ
No full textKazuaki Yamagata, Mitsutaka Sugimura, Miki Yoshida, Shinichi Sekine, Akiyo Kawano, Aiko Oyamaguchi, Hiroharu Maegawa, Hitoshi Niwa, Estrogens Exacerbate Nociceptive Pain via Up-Regulation of TRPV1 and ANO1 in Trigeminal Primary Neurons of Female Rats, Endocrinology, Volume 157, Issue 11, 1 November 2016, Pages 4309–4317, https://doi.org/10.1210/en.2016-121
STUDY ON THE DEPOSITION OF DEBRIS FLOWS (1)-DEPOSITION DUE TO ABRUPT CHANGE OF BED SLOPE-
No full textStoppage and deposition of debris flows due to an abrupt flattening of channel slope aretheoretically and experimentally studied.A critical slope is defined as a function of concentration, angle of repose and densities of debrisand water. On a channel steeper than that slope debris can flow without any deposition. Thecapacities of the conveyance of the channels in such cases are discussed.Another critical slope, on a channel flatter than which a debris flow deposits with that slopeangle is obtained. This critical slope is a function of water discharge in the debris flow and the phy-sical properties of the deposit. Depositting processes in such cases are mathematically modeled.A debris flow can flow with partial deposition on the channel of which slope is between thetwo critical slopes. The process of channel bed variation in such a case is also treated.Theoretically obtained results are proved valid by the experiments.Stoppage and deposition of debris flows due to an abrupt flattening of channel slope aretheoretically and experimentally studied.A critical slope is defined as a function of concentration, angle of repose and densities of debrisand water. On a channel steeper than that slope debris can flow without any deposition. Thecapacities of the conveyance of the channels in such cases are discussed.Another critical slope, on a channel flatter than which a debris flow deposits with that slopeangle is obtained. This critical slope is a function of water discharge in the debris flow and the phy-sical properties of the deposit. Depositting processes in such cases are mathematically modeled.A debris flow can flow with partial deposition on the channel of which slope is between thetwo critical slopes. The process of channel bed variation in such a case is also treated.Theoretically obtained results are proved valid by the experiments
Erratum: The histone demethylase JMJD2B regulates endothelial-to-mesenchymal transition (Proceedings of the National Academy of Sciences of the United States of America (2020) 117 (4180-4187) DOI: 10.1073/pnas.1913481117)
No full textCorrection for “The histone demethylase JMJD2B regulates endothelial-to-mesenchymal transition,” by Simone F. Glaser, Andreas W. Heumüller, Lukas Tombor, Patrick Hofmann, Marion Muhly-Reinholz, Ariane Fischer, Stefan Günther, Karoline E. Kokot, David Hassel, Sandeep Kumar, Hanjoong Jo, Reinier A. Boon, Wesley Abplanalp, David John, Jes-Niels Boeckel, and Stefanie Dimmeler, which was first published February 7, 2020; 10.1073/pnas.1913481117 (Proc. Natl. Acad. Sci. U.S.A. 117, 4180-4187). The authors note that Hitoshi Okada should be added to the author list between Karoline E. Kokot and David Hassel. Hitoshi Okada should be credited with providing mice. The corrected author line, affiliation line, and author contributions appear below. The online version has been corrected
ERRATA
No full textVolume and issue: Vol.6, No.7 (2011)Page: pp.317-322Title: Contribution of Slip and Cleavage in Friction and Wear at (10-14) Surface of Magnesite (MgCO3) CrystalAuthor(s): Kaori Niki, Mai Kobayashi and Hitoshi ShindoVolume and issue: Vol.7, No.1 (2012)Page: pp.8-12Title: Frictional Asymmetry and Wear Pattern Formation by Slip and Cleavage Detected at Directional r {10-14} Face of Calcite (CaCO3)Author(s): Kaori Niki, Mai Kobayashi and Hitoshi Shind
Letter from John Lancaster, Unit President, A.I.F.D., January 29, 1970
No full textLetter from John Lancaster, Chairman, American Institute of Floral Designers (A.I.F.D) addressed to the florists who are interested in attending the Yoke Kuromi Memorial Dinner.This collection contains two photograph albums and material related to Hitoshi "Yoke" Kuromi and Corrine Nobuko Nishimura Kuromi. Subjects in the collection include the Kuromi family, the Gila River incarceration camp, and hot rods, and classic cars
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