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American Journal of Plant Sciences 2013年第1期4卷 38-41页

作者： Kanako Matsuyama Hiroshi hayakawa Yuko Muramatsu Katsura Ito Shin-Ichi Tebayashi Ryo Arakawa Jun Yokoyama Tatsuya Fukuda Faculty of Agriculture Kochi University Nankoku Japan Faculty of Science Yamagata University Yamagata Japan Graduate School of Integrated Arts and Sciences Kochi University Nankoku Japan

Arisaema iyoanum Makino subsp. nakaianum (Ohba) H. Ohashi et J. Murata and A. ovale Nakai var. ovale are known to have one-leaved phenotype in both males and females;however, we discovered two-leaved individuals of these species. To elucidate the relationship between growth stage and leaf number of A. iyoanum subsp. nakaianum and A. ovale var. ovale, we conducted a morphological analysis of these plants. Our analysis suggested that the two-leaved individuals of A. iyoanum subsp. nakaianum and A. ovale var. ovale appeared only at the female phase. This suggested that one-leaved A. iyoanum subsp. nakaianum and A. ovale var. ovale individuals could not store the resources and hence changed to two-leaved individuals. This transformation could be explained by the fact that these species occur at high altitudes in mountain areas or regions covered in snow of the Japan Sea side, and their flowering time is also late compared with that in other sympatric Arisaema species.

关键词： Arisaema iyoanum subsp.nakaianum A. ovale var. ovale Leaf Number

Morphological Study of Glochidion obovatumunder Heavy Browsing Pressure by Sika Deer

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American Journal of Plant Sciences 2014年第9期5卷 1345-1351页

作者： Shogo Takei Kazuhiro Yoshioka Satoru Yamada Hiroshi hayakawa Jun Yokoyama Katsura Ito Shinichi Tebayashi Ryo Arakawa Tatsuya Fukuda Faculty of Agriculture Kochi University Kochi Japan Faculty of Science Yamagata University Yamagata Japan

To clarify the modification of physical defences of Glochidion obovatum Sieb. et Zucc., we compared the length of spine-like branches and frequency of lateral branches of G. obovatum between Kashima Island, which supports a high density of sika deer (Cervus nippon), and its neighbouring areas. The length of spine-like branches of G. obovatum in Kashima Island was not significantly longer than that of the neighbouring areas, but the frequency of lateral branches on the island was higher than that of the neighbouring areas. Since the branches of G. obovatum are heavily foraged by the sika deer, the shrub form of the species has evolved into the bonsai form, suggesting increased frequency of occurrence of lateral branches, which could develop as shoot-like branches. Thus, the observed features are facultative defence mechanisms of G. obovatum against heavy browsing in a small-sized island with very high density of sika deer.

关键词： Deer Defence Frequency Herbivore Island Sika

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大众心理学丛书 102 语言与人生

Feasibility study of laser-driven neutron sources for pharmaceutical applications

1985年

作者：早川博士（S.I.hayakawa）邓海珠译

来源：汇雅图书（南通市图书馆... 评论

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High Power Laser Science and Engineering 2023年第2期11卷 37-43页

作者： Takato Mori Akifumi Yogo Yasunobu Arikawa Takehito hayakawa Seyed R.Mirfayzi Zechen Lan Tianyun Wei Yuki Abe Mitsuo Nakai Kunioki Mima Hiroaki Nishimura Shinsuke Fujioka Ryosuke Kodama Institute of Laser Engineering Osaka UniversitySuitaJapan National Institutes for Quantum Science and Technology TokaiJapan Tokamak Energy Ltd. AbingdonUK Graduate School of Engineering Osaka UniversitySuitaJapan Fukui University of Technology FukuiJapan

We predict the production yield of a medical radioisotope^(67)Cu using^(67)Zn(n,p)^(67)Cu and ^(68)Zn(n,pn)^(67)Cu reactions with fast neutrons provided from laser-driven neutron *** neutrons were generated by the p+9Be and d+9Be reactions with high-energy ions accelerated by laser–plasma *** evaluated the yield to be(3.3±0.5)×10^(5) atoms for^(67)Cu,corresponding to a radioactivity of 1.0±0.2 Bq,for a Zn foil sample with a single laser *** a simulation with this result,we estimated^(67)Cu production with a high-frequency *** result suggests that it is possible to generate^(67)Cu with a radioactivity of 270 MBq using a future laser system with a frequency of 10 Hz and 10,000-s radiation in a hospital.

关键词： laser ion acceleration laser-driven neutron source medical radioisotope

Comparative Morphology and Anatomy of Non-Rheophytic and Rheophytic Types of Adenophora triphyllavar. Japonica(Campanulaceae)

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American Journal of Plant Sciences 2012年第6期3卷 805-809页

作者： Kyohei Ohga Miwako Muroi Hiroshi hayakawa Jun Yokoyama Katsura Ito Shin-Ichi Tebayashi Ryo Arakawa Tatsuya Fukuda Faculty of Agriculture Kochi University Kochi Japan Faculty of Science Yamagata University Yamagata Japan.

The morphology and anatomy of leaves of rheophytic and non-rheophytic types of Adenophora triphylla (Thunb.) ADC var. japonica (Regel) H. Hara were compared in order to clarify how leaf characteristics differ. Our results revealed that the leaf of the rheophytic type of A. triphylla var. japonica was narrower than the leaf of the non-rheophytic type because of fewer cells that were also smaller. Moreover, surprisingly, the rheophytic ecotype of A. triphylla var. japonica was thinner than that of the non-rheophytic type, although the general tendency is that the rheophytic leaf is thicker than the closely related non-rheophytic species, suggesting that the rheophytic type of A. triphylla var. japonica adapts differently, as compared to other rheophytic plants, to solar radiation and evaporation.

关键词： Rheophyte Leaf Ecotype Adenophora triphylla var. Japonica

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术前储血式自体血输血在泌尿外科的应用

世界医学杂志 2001年第8期5卷 45-46页

作者： Takahiro hayakawa 洪景范等

对53例泌尿外科手术患者进行术前储血式血体血输血，并对采血前、手术前、手术后的RBC、Hb、Ht变化进行了讨论。采血前：RBC：434×10^4/mm^3、Hb：13.4g/dl、Ht:39.66%，手术日：RBC：395×10^4/mm^3、Hb:12.3g/dl、Ht:36.9%。三项指... 详细信息

对53例泌尿外科手术患者进行术前储血式血体血输血，并对采血前、手术前、手术后的RBC、Hb、Ht变化进行了讨论。采血前：RBC：434×10^4/mm^3、Hb：13.4g/dl、Ht:39.66%，手术日：RBC：395×10^4/mm^3、Hb:12.3g/dl、Ht:36.9%。三项指标虽然较采血前有所下降，但并不影响手术，因此，本方法是一种不需要特殊设备又安全有效的治疗方法。

关键词：泌尿外科手术储血式自血输血安全性疗效

The Length and Density of Prickles on Zanthoxylum ailanthoides(Rutaceae): A Comparison of Japanese Islands with Different Sika Deer Browsing Pressures

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American Journal of Plant Sciences 2014年第3期5卷 332-337页

作者： Shogo Takei Kazuhiro Yoshioka Satoru Yamada Hiroshi hayakawa Jun Yokoyama Katsura Ito Shin-Ichi Tebayashi Ryo Arakawa Tatsuya Fukuda Faculty of Agriculture Kochi University Kochi Japan Faculty of Science Yamagata University Yamagata Ja-pan

To determine the effects of sika deer (Cervus nippon) browsing on the physical defences of the Japanese pricklyash “Zanthoxylum ailanthoides Sieb. et Zucc.” (Rutaceae), we compared the length and density of prickles on Japanese islands which were under different browsing pressures. We measured the length and density of prickles on the midribs, leaf rachis, and stems. We found that the prickles of Z. ailanthoides on Kashima island were not significantly longer or at higher densities than those in the neighbouring areas;the longest pickles at the highest densities were found on Akune island. The density of sika deer on Akune (ca. 520-600/km2) was higher than that on Kashima (ca. 38.5/km2), and consequently, Akune was under greater browsing pressure. Our results suggest that the increased length and density of prickles on Akune is a response by Z. ailanthoides to the high density of sika deer found on the island.

关键词： Deer Defence Density Herbivore Island Length Sika

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《英语同义词正确用法指南》引论

城市学刊 1981年第4期 91-94页

作者： S.I.hayakawa ,佘学文

英语在若干世纪的发展过程中,不断兼收并蓄了许多其他语种的词语,而成为世界上词汇最丰富、同义词最多的一个语种。即使在十一世纪中叶诺曼人入侵以前,盎格鲁—撒克逊语汇中就已经有了很多外来词汇。比如来自拉丁语的street(街道)、

关键词：词汇英语希腊语语种希腊语族惯用词语单词拉丁语诺曼人专门术语

Contaminated Effect of Geomagnetic Storms on Pre-Seismic Atmospheric and Ionospheric Anomalies during Imphal Earthquake

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Open Journal of Earthquake Research 2020年第5期9卷 383-402页

作者： Sagardweep Biswas Subrata Kundu Soujan Ghosh Swati Chowdhury Shih-Sian Yang Masashi hayakawa Suman Chakraborty Sandip K. Chakrabarti Sudipta Sasmal Indian Centre for Space Physics Kolkata India Institute of Space Science National Central University Chinese Taipei hayakawa Institute of Seismo Electromagnetics Co. Ltd. UEC Alliance Center Chofu Tokyo Japan Physical Research Laboratory Navrangpura Ahmedabad India

Study of seismo-ionospheric coupling mechanism demands the quiet geomagnetic condition to eliminate any kind of contamination in the lower atmospheric and ionospheric parameters. In this manuscript, we present the effect of back to back two geomagnetic storms before a strong earthquake happened in Imphal, India on January 4, 2016 (M = 6.7). We studied the lower ionospheric irregularities for the duration of 31 days by computing the nighttime fluctuations in Very Low Frequency (VLF) radio signal received transmitter JJI (22.2 kHz) in Japan at Ionospheric and Earthquake Research Centre & Optical Observatory (IERCOO), Sitapur, India. We also studied the presence of Atmospheric Gravity Wave (AGW) in nighttime VLF signal in lower ionospheric heights and the same computed that from SABER/TIMED satellite. Two geomagnetic storms occurred on December 21, and 31, 2015. By the conventional analysis, we found that there is a significant decrease in nighttime trend and an increase in nighttime fluctuations around 15 days before the earthquake and just on the first storm and thus the pre-seismic effects on VLF signal gets contaminated due to the presence of storms. The wave-like structure in VLF fluctuations shows significant increase in intensity by using Fourier and Wavelet analysis before the earthquake. By analysis of SABER data, we found significant enhancement in AGW around 10 days before the earthquake. As the wavelike structures are coming from neutral acoustics reasons from pressure or temperature variations, this paper exhibits a significant example of contamination in ionospheric parameters due to geomagnetic storm where the acoustics parameters remain un-contaminated.

关键词： Very Low Frequency Wave Propagation Earthquake Precursory Atmospheric Gravity Wave Geomagnetic Strom SABER/TIMED

与地震有关的电离层扰动的甚低频/低频无线电探测

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世界地震译丛 2009年第2期40卷 53-64页

作者： M. hayakawa 马君钊（译）张磊（校）陈化然（复校）不详天津市地震局

近期人们认识到,电离层对地震影响非常敏感,探测与地震有关的电离层扰动看来对地震短临预测是非常有前途的。我们提出可利用甚低频/低频(3～30kHz/30～300kHz)无线电探测进行地震—电离层扰动的探测。1995年神户地震明显发现电离层扰动... 详细信息

近期人们认识到,电离层对地震影响非常敏感,探测与地震有关的电离层扰动看来对地震短临预测是非常有前途的。我们提出可利用甚低频/低频(3～30kHz/30～300kHz)无线电探测进行地震—电离层扰动的探测。1995年神户地震明显发现电离层扰动现象之后,开始了利用低电离层甚低频/低频传播信号进行地震短临预测的简短历史。在说明先前的甚低频/低频结果之后,我们给出了最新的甚低频/低频发现:一个是电离层扰动与地震在统计上相关,第二个是2004年12月苏门答腊地震的实例研究,说明了这次地震电离层扰动的空间尺度和动力学原理。

关键词：电离层扰动甚低频/低频无线电探测地震预测