Search Results - "Iwai, Kazumasa"

Comparison of Solar Multifrequency Microwave Data with Other Solar Indices for Understanding Solar and Stellar Microwave Data by Shimojo, Masumi, Namekata, Kosuke, Iwai, Kazumasa, Asai, Ayumi, Watanabe, Kyoko

“…Abstract Thermal microwave emissions detected from stellar atmospheres contain information on stellar activity. However, even for the Sun, the relationship…”
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Validation of coronal mass ejection arrival-time forecasts by magnetohydrodynamic simulations based on interplanetary scintillation observations by Iwai, Kazumasa, Shiota, Daikou, Tokumaru, Munetoshi, Fujiki, Ken’ichi, Den, Mitsue, Kubo, Yûki

“…Coronal mass ejections (CMEs) cause various disturbances of the space environment; therefore, forecasting their arrival time is very important. However,…”
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Over seven decades of solar microwave data obtained with Toyokawa and Nobeyama Radio Polarimeters by Shimojo, Masumi, Iwai, Kazumasa

“…Monitoring observations of solar microwave fluxes and their polarization began in Japan during the 1950s at Toyokawa and Mitaka. At present (April 2022),…”
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Solar ALMA Observations: Constraining the Chromosphere above Sunspots by Loukitcheva, Maria A., Iwai, Kazumasa, Solanki, Sami K., White, Stephen M., Shimojo, Masumi

“…We present the first high-resolution Atacama Large Millimeter/Submillimeter Array (ALMA) observations of a sunspot at wavelengths of 1.3 and 3 mm, obtained…”
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Electron Cyclotron Maser Emission and the Brightest Solar Radio Bursts by White, Stephen M., Shimojo, Masumi, Iwai, Kazumasa, Bastian, Timothy S., Fleishman, Gregory D., Gary, Dale E., Magdalenic, Jasmina, Vourlidas, Angelos

“…Abstract This paper investigates the incidence of coherent emission in solar radio bursts, using a revised catalog of 3800 solar radio bursts observed by the…”
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Development of a coronal mass ejection arrival time forecasting system using interplanetary scintillation observations by Iwai, Kazumasa, Shiota, Daikou, Tokumaru, Munetoshi, Fujiki, Ken’ichi, Den, Mitsue, Kubo, Yûki

“…Coronal mass ejections (CMEs) cause disturbances in the environment of the Earth when they arrive at the Earth. However, the prediction of the arrival of CMEs…”
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Coordinated Interplanetary Scintillation Observations in Japan and Russia for Coronal Mass Ejection Events in Early September 2017 by Tokumaru, Munetoshi, Fujiki, Ken’ichi, Iwai, Kazumasa, Tyul’bashev, Sergey, Chashei, Igor

“…Interplanetary (IP) shocks traveling between the Sun and the Earth’s orbit were clearly detected in interplanetary scintillation (IPS) observations made at…”
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Solar Polar Brightening and Radius at 100 and 230 GHz Observed by ALMA by Selhorst, Caius L., Simões, Paulo J. A., Brajša, Roman, Valio, Adriana, de Castro, C. G. Giménez, Costa, Joaquim E. R., Menezes, Fabian, Rozelot, Jean Pierre, Hales, Antonio S., Iwai, Kazumasa, White, Stephen

“…Polar brightening of the Sun at radio frequencies has been studied for almost 50 years and yet a disagreement persists between solar atmospheric models and…”
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Variation of the Solar Microwave Spectrum in the Last Half Century by Shimojo, Masumi, Iwai, Kazumasa, Asai, Ayumi, Nozawa, Satoshi, Minamidani, Tetsuhiro, Saito, Masao

“…The total solar fluxes at 1, 2, 3.75, and 9.4 GHz were observed continuously from 1957 to 1994 at Toyokawa, Japan, and from 1994 until now at Nobeyama, Japan,…”
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The Brightness Temperature of the Quiet Solar Chromosphere at 2.6 mm by Iwai, Kazumasa, Shimojo, Masumi, Asayama, Shinichiro, Minamidani, Tetsuhiro, White, Stephen, Bastian, Timothy, Saito, Masao

“…The absolute brightness temperature of the Sun at millimeter wavelengths is an important diagnostic of the solar chromosphere. Because the Sun is so bright,…”
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CHROMOSPHERIC SUNSPOTS IN THE MILLIMETER RANGE AS OBSERVED BY THE NOBEYAMA RADIOHELIOGRAPH by Iwai, Kazumasa, Koshiishi, Hideki, Shibasaki, Kiyoto, Nozawa, Satoshi, Miyawaki, Shun, Yoneya, Takuro

“…ABSTRACT We investigate the upper chromosphere and the transition region of the sunspot umbra using the radio brightness temperature at 34 GHz (corresponding…”
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BepiColombo Science Investigations During Cruise and Flybys at the Earth, Venus and Mercury by Mangano, Valeria, Dósa, Melinda, Fränz, Markus, Milillo, Anna, Oliveira, Joana S., Lee, Yeon Joo, McKenna-Lawlor, Susan, Grassi, Davide, Heyner, Daniel, Kozyrev, Alexander S., Peron, Roberto, Helbert, Jörn, Besse, Sebastien, de la Fuente, Sara, Montagnon, Elsa, Zender, Joe, Volwerk, Martin, Chaufray, Jean-Yves, Slavin, James A., Krüger, Harald, Maturilli, Alessandro, Cornet, Thomas, Iwai, Kazumasa, Miyoshi, Yoshizumi, Lucente, Marco, Massetti, Stefano, Schmidt, Carl A., Dong, Chuanfei, Quarati, Francesco, Hirai, Takayuki, Varsani, Ali, Belyaev, Denis, Zhong, Jun, Kilpua, Emilia K. J., Jackson, Bernard V., Odstrcil, Dusan, Plaschke, Ferdinand, Vainio, Rami, Jarvinen, Riku, Ivanovski, Stavro Lambrov, Madár, Ákos, Erdős, Géza, Plainaki, Christina, Alberti, Tommaso, Aizawa, Sae, Benkhoff, Johannes, Murakami, Go, Quemerais, Eric, Hiesinger, Harald, Mitrofanov, Igor G., Iess, Luciano, Santoli, Francesco, Orsini, Stefano, Lichtenegger, Herbert, Laky, Gunther, Barabash, Stas, Moissl, Richard, Huovelin, Juhani, Kasaba, Yasumasa, Saito, Yoshifumi, Kobayashi, Masanori, Baumjohann, Wolfgang

“…The dual spacecraft mission BepiColombo is the first joint mission between the European Space Agency (ESA) and the Japanese Aerospace Exploration Agency (JAXA)…”
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Measurements of Coronal and Chromospheric Magnetic Fields Using Polarization Observations by the Nobeyama Radioheliograph by Iwai, Kazumasa, Shibasaki, Kiyoto

“…Coronal and chromospheric magnetic fields are derived from polarization and spectral observations of the thermal free-free emission using the Nobeyama…”
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PSTEP: project for solar–terrestrial environment prediction by Kusano, Kanya, Ichimoto, Kiyoshi, Ishii, Mamoru, Miyoshi, Yoshizumi, Yoden, Shigeo, Akiyoshi, Hideharu, Asai, Ayumi, Ebihara, Yusuke, Fujiwara, Hitoshi, Goto, Tada-Nori, Hanaoka, Yoichiro, Hayakawa, Hisashi, Hosokawa, Keisuke, Hotta, Hideyuki, Hozumi, Kornyanat, Imada, Shinsuke, Iwai, Kazumasa, Iyemori, Toshihiko, Jin, Hidekatsu, Kataoka, Ryuho, Katoh, Yuto, Kikuchi, Takashi, Kubo, Yûki, Kurita, Satoshi, Matsumoto, Haruhisa, Mitani, Takefumi, Miyahara, Hiroko, Miyoshi, Yasunobu, Nagatsuma, Tsutomu, Nakamizo, Aoi, Nakamura, Satoko, Nakata, Hiroyuki, Nishizuka, Naoto, Otsuka, Yuichi, Saito, Shinji, Saito, Susumu, Sakurai, Takashi, Sato, Tatsuhiko, Shimizu, Toshifumi, Shinagawa, Hiroyuki, Shiokawa, Kazuo, Shiota, Daikou, Takashima, Takeshi, Tao, Chihiro, Toriumi, Shin, Ueno, Satoru, Watanabe, Kyoko, Watari, Shinichi, Yashiro, Seiji, Yoshida, Kohei, Yoshikawa, Akimasa

“…Although solar activity may significantly impact the global environment and socioeconomic systems, the mechanisms for solar eruptions and the subsequent…”
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Venus's induced magnetosphere during active solar wind conditions at BepiColombo's Venus 1 flyby by Volwerk, Martin, Sánchez-Cano, Beatriz, Heyner, Daniel, Aizawa, Sae, André, Nicolas, Varsani, Ali, Mieth, Johannes, Orsini, Stefano, Baumjohann, Wolfgang, Fischer, David, Futaana, Yoshifumi, Harrison, Richard, Jeszenszky, Harald, Kazumasa, Iwai, Laky, Gunter, Lichtenegger, Herbert, Milillo, Anna, Miyoshi, Yoshizumi, Nakamura, Rumi, Plaschke, Ferdinand, Richter, Ingo, Rojas Mata, Sebastián, Saito, Yoshifumi, Schmid, Daniel, Shiota, Daikou, Simon Wedlund, Cyril

“…Out of the two Venus flybys that BepiColombo uses as a gravity assist manoeuvre to finally arrive at Mercury, the first took place on 15 October 2020. After…”
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OCTAD-S: digital fast Fourier transform spectrometers by FPGA by Iwai, Kazumasa, Kubo, Yûki, Ishibashi, Hiromitsu, Naoi, Takahiro, Harada, Kenichi, Ema, Kenji, Hayashi, Yoshinori, Chikahiro, Yuichi

“…We have developed a digital fast Fourier transform spectrometer made of an analog-to-digital converter (ADC) and a field-programmable gate array (FPGA). The…”
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Coronal magnetic field and the plasma beta determined from radio and multiple satellite observations by Iwai, Kazumasa, Shibasaki, Kiyoto, Nozawa, Satoshi, Takahashi, Takuya, Sawada, Shinpei, Kitagawa, Jun, Miyawaki, Shun, Kashiwagi, Hirotaka

“…We derived the coronal magnetic field, plasma density, and temperature from the observation of polarization and intensity of radio thermal free-free emission…”
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After 70 years of silence--An expression of regret at the 2010 Congress of German Society of Psychiatry, Psychotherapy and Neurology. (Addendum) "Psychiatry under the Nazi Regime--recollection and responsibility", a speech given by Frank Schneider, President of DGPPN at a memorial ceremony by Iwai, Kazumasa

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An RNS FFT Circuit Using LUT Cascades Based on a Modulo EVMDD by Nakahara, Hiroki, Sasao, Tsutomu, Nakanishi, Hiroyuki, Iwai, Kazumasa

“…This paper proposes an FFT circuit based on a residue number system (RNS) using LUT cascades. To reduce the number of look-up tables (LUTs) in an FPGA, we used…”
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Acute psychiatric inpatient care: A cross-cultural comparison between two hospitals in Germany and Japan by Moriwaki, Kumi, Neuner, Tanja, Hübner-Liebermann, Bettina, Hausner, Helmut, Wittmann, Markus, Horiuchi, Toshihiro, Watanabe, Hiromi, Kato, Hideyuki, Hirakawa, Junich, Iwai, Kazumasa

“…Background: Intercultural differences influence acute inpatient psychiatric care systems. Aims: To evaluate characteristics of acute inpatient care in a German…”
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