Earth science & Astronomy

• A discussion on the hypothesis that the universe is a black hole Approaches from Newtonian mechanics and Special relativity

  Masato Yamawaki

  • black hole
  • Schwarzschild radius
  • event horizon
  • Newtonian mechanics
  • Special relativity
  • redshift
  • Big Bang
  • fine-structure constant

  Downloads ：1226 - Submitted 2022-05-05 20:20:45 UTC - Posted 2024-06-25 00:26:38 UTC - Versions: 6

  • PDF_ver.6 (日本語)

• Maintenance Mechanisms of Orographic Quasi-Stationary Convective Band Formed over the Eastern Part of Shikoku, Japan

  Akira Nishii, Taro Shinoda, Koji Sassa

  • Mesoscale convective system
  • Localized heavy rainfall
  • Quasi-stationary convective band
  • Orographic precipitation

  Downloads ：23 - Submitted 2024-06-19 07:55:05 UTC - Posted 2024-06-24 01:50:33 UTC

  • PDF

• Spatiotemporal Distribution of b Value Estimated from Seismic Activity in the Northern Part of Tokushima Prefecture A Report as of April 2024 in Tokushima City and Surrounding Municipalities

  Toshiki SHIMBARU

  • b value
  • Spatiotemporal distribution
  • Seismic activity
  • Kamiura-Nishitsukinomiya fault
  • Northern part of Tokushima Prefecture
  • Tokushima City

  Downloads ：69 - Submitted 2024-05-15 06:20:57 UTC - Posted 2024-05-20 05:23:00 UTC

  • PDF (日本語)

• Spatiotemporal Distribution of b Value Estimated from Seismic Activity in the Northern Part of Tokushima Prefecture A Report as of April 2024 in Tokushima City and Surrounding Municipalities

  Toshiki SHIMBARU

  • b value
  • Spatiotemporal distribution
  • Seismic activity
  • Kamiura-Nishitsukinomiya fault
  • Northern part of Tokushima Prefecture
  • Tokushima City

  Downloads ：21 - Submitted 2024-05-14 01:52:17 UTC - Posted 2024-05-14 07:53:19 UTC

  • PDF

• Direction of Tornado Motions and Its Relationship with the Large-scale Wind Field

  Yuri Mita, Tsubasa Kohyama

  • tornado
  • direction of movement
  • circular statisttics
  • typhoon
  • supercell

  Downloads ：148 - Submitted 2023-11-11 01:45:08 UTC - Posted 2024-04-01 09:59:36 UTC - Versions: 2

  • PDF_ver.2

• On residual 137Cs on shallow rugged reefs lying inshore of Fukushima: Part 2 Methodological improvements

  Fumie Suzuki, Masataka Imazeki, Jiro Yamada, Yutaka Yamada, Noriyuki Kumagai, Hideo Ohashi, Hiromi Shibata, Ken-ichi Nogami, Nobuhiro Shiotani

  • underwater CsI(Tl) gamma-ray spectrometer
  • in situ and stationary measurement
  • 137Cs
  • shallow rugged reefs

  Downloads ：66 - Submitted 2024-01-14 16:48:15 UTC - Posted 2024-01-20 00:55:39 UTC

  • PDF
  • Supplement_PDF

• On residual 137Cs on shallow rugged reefs lying inshore of Fukushima: Part 1 Levels, distribution, and flux of radiations

  Fumie Suzuki, Hideo Ohashi, Ken-ichi Nogami, Hiromi Shibata, Hisayuki Arakawa, Kentaro Umeda, Teiji Kobayasi, Nobuhiro Shiotani

  • Fukushima Daiichi Nuclear Power Plant
  • Levels of 137Cs on rugged reefs
  • Simulation of transport of 662 keV gamma rays
  • Scalar flux of low energy gamma rays

  Downloads ：77 - Submitted 2024-01-14 15:50:17 UTC - Posted 2024-01-20 00:52:44 UTC

  • PDF
  • Supplement_PDF

• NuSTAR hard X-ray observations of the merging cluster of galaxies RX J1347.5-1145

  Mio Shibata, Naomi Ota

  • cosmology
  • X-rays
  • cluster of galaxies
  • intracluster medium

  Downloads ：152 - Submitted 2023-11-26 09:53:18 UTC - Posted 2023-12-04 08:37:58 UTC

  • PDF (日本語)

• Development of a Temperature Prediction Method Combining Deep Neural Networks and a Kalman Filter

  Takuya Inoue, Tsuyoshi Thomas Sekiyama, Atsushi Kudo

  • deep convolutional neural network
  • statistical post-processing
  • temperature forecast
  • Kalman filter
  • fine-tuning

  Downloads ：93 - Submitted 2023-09-19 04:09:03 UTC - Posted 2023-09-21 02:58:47 UTC

  • PDF

• Mechanism of secondary eyewall formation in tropical cyclones revealed by sensitivity experiments on the mesoscale descending inflow

  Kyohei Kasami, Masaki Satoh

  • tropical cyclone
  • secondary eyewall formation
  • eyewall replacement cyclone
  • mesoscale descending inflow

  Downloads ：117 - Submitted 2023-06-06 16:32:21 UTC - Posted 2023-06-08 09:20:48 UTC

  • PDF

• A New Gravitational Model of Spiral Galaxies Based on Newtonian Mechanics

  Yutaka Akiba

  • spiral galaxies
  • Newtonian mechanics
  • bulge
  • disk
  • rotation curve
  • Universal gravitation
  • gravitational principle
  • centripetal force
  • interstellar force
  • spiral force
  • dark matter

  Downloads ：188 - Submitted 2023-02-01 06:12:37 UTC - Posted 2023-04-10 10:13:37 UTC - Versions: 2

  • PDF_ver.2

• A New Closure Assumption and Formulation Based on the Helmholtz Decomposition in the Generalized Velocity Track Display

  Satoki Tsujino, Takeshi Horinouchi, Udai Shimada

  • Tropical cyclone
  • Doppler weather radar
  • Typhoon
  • Hurricane
  • Mesoscale meteorology

  Downloads ：153 - Submitted 2023-02-24 03:45:14 UTC - Posted 2023-02-28 05:29:37 UTC

  • PDF

• Characteristics analysis of the senjo-kousuitai conditions in the Kyushu region in early July: The case of the July 2020 heavy rainfall event

  Masaki Satoh, Keisuke Hosotani

  • senjo-kousuitai
  • water vapor flux
  • storm-relative helicity
  • western North Pacific high

  Downloads ：149 - Submitted 2022-10-07 06:01:44 UTC - Posted 2022-10-14 09:11:02 UTC

  • PDF

• Thermodynamic geometric analysis of D-dimensional RN black hole

  Wen-Xiang Chen, Yao-Guang Zheng

  • RN black holes
  • six-dimensional
  • D-dimensional

  Downloads ：215 - Submitted 2022-06-10 22:17:41 UTC - Posted 2022-06-16 01:17:51 UTC

  • PDF

• The relative roles of the sea surface temperature over the Pacific Meridional Mode and Indian Ocean on tropical cyclone genesis over the North Pacific in super El Niño of 2015

  Takahiro Ishiyama, Masaki Satoh, Yohei Yamada

  • tropical cyclone
  • El Niño
  • Pacific Meridional Mode
  • monsoon trough
  • vertical shear

  Downloads ：231 - Submitted 2022-05-16 07:34:59 UTC - Posted 2022-05-18 01:48:20 UTC

  • PDF

• Astronomical Observations at Nagashima-Aiseien, a Hansen’s disease sanatorium

  Hiroaki Isobe

  • sunspot
  • occulting observation
  • Hansen's disease
  • Amateur astroonmy

  Downloads ：523 - Submitted 2022-05-11 08:01:00 UTC - Posted 2022-05-12 09:33:56 UTC

  • PDF (日本語)

• Mapping of cosmic dark matter with gravitational lensing analyses and applications of deep learning networks

  Masato Shirasaki

  • Cosmic dark matter
  • Gravitational lensing
  • Deep learning
  • Generative models
  • Generative adversarial networks

  Downloads ：510 - Submitted 2022-05-10 03:59:52 UTC - Posted 2022-05-11 09:58:26 UTC

  • PDF (日本語)

• Analysis of the Factors that Led to an uncertainty of track forecast of Typhoon Krosa (2019) by 101-member ensemble forecast experiments using NICAM

  Masuo Nakano, Ying-Wen Chen, Masaki Satoh

  • tropical cyclone
  • track forecast
  • Fujiwhara effect
  • forecast bust
  • western North Pacific subtropical high

  Downloads ：237 - Submitted 2022-04-08 01:37:44 UTC - Posted 2022-04-11 02:16:55 UTC

  • PDF

• The Economic Evaluation of Tight Oil Development under Uncertainty: Example of Development in China

  XIAOZHENG LIU

  • tight oil
  • economic evaluation
  • uncertainty
  • optimization

  Downloads ：307 - Submitted 2022-03-24 01:57:04 UTC - Posted 2022-03-28 09:48:51 UTC

  • PDF

• Statistical Analysis of Remote Precipitation in Japan Caused by Typhoons in September

  Shinichi Kodama, Masaki Satoh

  • Typhoon
  • Remote precipitation
  • Water vapor flux
  • Autumn rainy season

  Downloads ：323 - Submitted 2022-03-24 02:22:55 UTC - Posted 2022-03-25 14:06:20 UTC

  • PDF