JAPANESE JOURNAL OF BIOMETEOROLOGY
Online ISSN : 1347-7617
Print ISSN : 0389-1313
ISSN-L : 0389-1313
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Volume 41, Issue 4
Displaying 1-4 of 4 articles from this issue
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Original Article
  • Effects of listening to music on heart rate variability
    Kiyokazu Hori, Yasutoshi Senga, Satoshi Minami, Seiki Hori
    2004 Volume 41 Issue 4 Pages 131-140
    Published: 2004
    Released on J-STAGE: April 22, 2005
    DOIhttps://doi.org/10.11227/seikisho.41.131
    JOURNAL FREE ACCESS
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    Eleven male university students and 14 female university students were selected as subjects. Subjects sat with their eyes shut in a chair at rest and listened to 8 different kinds of music at loudness levels on an average of 70 db. Beat-to-beat R-R intervals were recorded continuously prior to, during listening to the music and immediately after cessation of acoustic stimuli using headphones. Data were analyzed using a fast Fourier transform algorithm. Low frequency (LF) power and high frequency (HF) power were defined as 0.04–0.15 and 0.15–0.40 Hz, respectively. The value of HF is associated with activity of the parasympathetic nervous system and LF/HF ratio is regarded as a reliable index of activity of the sympathetic nervous system. To estimate changes in cardiac autonomic function induced by listening to different kinds of music, plotting of LF and LF/HF in standard measure against HF in standard measure and plotting of LF/HF (%) against HF (%) accompanied by central area and lines of the same value of parameter R indicating state of balance in autonomic nervous system were used. Values of LF and LF/HF tended to decrease during listening and increased after cessation of listening whereas values of HF in female subjects tended to increase during listening to music. Male subjects tended to show greater values of LF and LF/HF and smaller values of HF. In male subjects, values of LF and LF/HF after cessation of listening were significantly greater than those during listening to some music. Values of LF and LF/HF after cessation of acoustic stimuli in male subjects were significantly greater than those in female subjects. Music containing familiar and a slight musical component caused lesser changes in activities of the autonomic nervous system. Smaller sound changes in music and nontonal music may be more effective to increase HF.
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Material
  • Development of Phenological Recognition and Phenology In Ancient China
    Masatoshi Yoshino
    2004 Volume 41 Issue 4 Pages 141-154
    Published: 2004
    Released on J-STAGE: April 22, 2005
    DOIhttps://doi.org/10.11227/seikisho.41.141
    JOURNAL FREE ACCESS
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    Routine observation and descriptions of phenological events started in China in the 21st century B.C. A phenological calendar of agricultural activities was also developed in this period. These facts should be noted from the viewpoint not only of bioclimatology, but also of the ancient history of natural sciences in the world. In the 11th century B.C., weather was recorded in terms of about 200 kinds of phenomena. Comparing the records in China to those in Parapegmata in ancient Greece, which were carved in limestone in the 5th century B.C., one noted that the Chinese phenological calendar was developed several hundreds of years earlier and was more comprehensive. In the 11th century B.C., a calendar named 24 “jieqi” was completed (with year divided into 24 periods, that is, two periods per month). Further, 72 “hou”, having five day-periods, was established in the 1st century B.C. by naming corresponding phenological events. This calendar was a peculiar solar-lunar calendar. In order to find climate anomaly for the year, special attention was paid to anomalous phenological events in the form of proverbs among the farmers.
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Review
  • Terminology employable in the interdisciplinary assembly
    Tokuo Ogawa
    2004 Volume 41 Issue 4 Pages 155-162
    Published: 2004
    Released on J-STAGE: April 22, 2005
    DOIhttps://doi.org/10.11227/seikisho.41.155
    JOURNAL FREE ACCESS
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    In interdisciplinary assemblies, presenters should pay spcial attention to appropreate usage of technical terms. Unintelligible terms and jargons should be avoided. In oral presentation, abbreviations should not be abused, except for ones widely known or generally accepted. Single acronyms may stand for a variety of words, and may be misunderstood by some of the audience of different specialties. Etymologically absurd terms or nonce words should not be coined. The way of kana writing of loan words, chemical names, proper names, etc. is not consistent. Such inconsistency is often unadjustable but should not be ignored. Abuses of loan words including coinage of so-called ‘Japanese English’ words have recently been more and more conspicuous, not only in mass media but even in scientific books and official documents. Reconsideration of scholars, researchers, educators as well as beaureaucrats is urged.
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Conference Report
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