著者

原 修一 河野 靖美 松田 沙織 内勢 美絵子 柏田 圭一 ハラ シュウイチ カワノ ヤスミ マツダ サオリ ウチセ ミエコ カシワダ ケイイチ Shuichi HARA Yasumi KAWANO Saori MATSUDA Mieko UCHISE Keiichi KASHIWADA

雑誌

九州保健福祉大学研究紀要 = Journal of Kyushu University of Health and Welfare

巻号頁・発行日

vol.17, pp.89-96, 2016-03

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Aim: We conducted two studies to elucidate the relationship between heartbeat rhythms and relaxation among Japanese babies, young children, and their parents.Subjects and Methods: STUDY 1: Seven parents (age M = 34.3, SD = 5.5 years) with infants or toddlers (age M = 9.4, SD = 6.7 months) participated by listening to three conditions—a heartbeat sound, music, or music with a heartbeat sound—while completing a semantic differential exercise assessing musical imagery. Three types of music (classical, music box, and children’ s songs) were used. Image scores were compared among the three conditions in each type of music. STUDY 2: Participants included 161 parents who listened to three pieces of music, each with a different heartbeat rhythm (patterns A, B, and C). The parents reported their baby or child’ s responses to the music and also self-reported feelings they experienced. Finally, the parents indicated the piece of music they most preferred and related images using the SD exercise. To perform our analyses, we also assessed acoustic characteristics of the three heartbeat sounds.Results: STUDY 1: In the music arranged for a music box, participants evaluated musical imagery as significantly more “airy,” “comfortable,” “feels good,” “relaxing,” “easy,” “awake,” and “amusing” when listening to music with a heartbeat sound, in comparison to the other two conditions (p < .05). STUDY 2: “Rocking the body” and “heard quietly and slept” were the infants’ and toddlers’ responses to the music with a heartbeat sound. Fifty-six parents (34.8%) preferred “pattern A” music, 47 (29.2%) preferred “pattern B,” and 10 (6.3%) preferred “pattern C.” In analysis of “pattern A” acoustics, the mean number of heartbeats per minute, mean heartbeat frequency, maximum heartbeat frequency, and heartbeat Pitch Period Perturbation Quotient (PPQ) were 58/min, 120.3 ± 32.8 Hz, 248.4 Hz, and 11.39%, respectively.Conclusion: This research suggests that a heartbeat sound effective for relaxation has a rhythm of 60 beats/min, low-frequency bandwidth (120–220 Hz), and low percentage of PPQ. Our studies also indicate that music arranged for a music box with a heartbeat sound might be beneficial for inducing relaxation.

著者

Hui Lan Urumu Tsunogai Fumiko Nakagawa Masanori Ito Ryo Shingubara Yuko Miyoshi Shuichi Hara

出版者

GEOCHEMICAL SOCIETY OF JAPAN

雑誌

GEOCHEMICAL JOURNAL (ISSN:00167002)

巻号頁・発行日

pp.GJ23005, (Released:2023-02-10)

被引用文献数

1

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To clarify the sources and fate of CH4 enriched in coastal seawaters, we determined the distribution of both the concentrations and dual stable isotope compositions (δ13C and δ2H) of dissolved CH4 in the bays of Ise and Mikawa in Japan during five sampling campaigns from 2013 to 2020, together with those in the major inflows of the Kiso, Nagara, and Yahagi Rivers. Excess CH4 were found in the surface layer of Ise Bay, and their δ13C and δ2H values were close to those of CH4 enriched in the major inflows, but deviated from those of CH4 in the sedimentary layer at the bottom of Ise Bay. The oxidation rates of CH4 in the water columns were negligibly small during the incubation experiments. In conclusion, the excess CH4 in the surface layer of Ise Bay was derived from the inflows. The CH4 enrichment in the freshwater sediments of the inflows showing up to four orders of magnitude higher CH4 concentrations than those in the sediments of Ise Bay supported this conclusion. Similar results were obtained in Mikawa Bay. The total emission flux of CH4 from the estuary area of Ise Bay was larger than the influx of CH4 into Ise Bay via the inflows, suggesting that the CH4 dissolved in the inflows was emitted into the atmosphere immediately after inflowing into the bay water.

著者

原 修一 河野 靖美 松田 沙織 内勢 美絵子 柏田 圭一 ハラ シュウイチ カワノ ヤスミ マツダ サオリ ウチセ ミエコ カシワダ ケイイチ Shuichi HARA Yasumi KAWANO Saori MATSUDA Mieko UCHISE Keiichi KASHIWADA

出版者

九州保健福祉大学

雑誌

九州保健福祉大学研究紀要 (ISSN:13455451)

巻号頁・発行日

no.17, pp.89-96, 2016-03

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Aim: We conducted two studies to elucidate the relationship between heartbeat rhythms and relaxation among Japanese babies, young children, and their parents.Subjects and Methods: STUDY 1: Seven parents (age M = 34.3, SD = 5.5 years) with infants or toddlers (age M = 9.4, SD = 6.7 months) participated by listening to three conditions—a heartbeat sound, music, or music with a heartbeat sound—while completing a semantic differential exercise assessing musical imagery. Three types of music (classical, music box, and children' s songs) were used. Image scores were compared among the three conditions in each type of music. STUDY 2: Participants included 161 parents who listened to three pieces of music, each with a different heartbeat rhythm (patterns A, B, and C). The parents reported their baby or child' s responses to the music and also self-reported feelings they experienced. Finally, the parents indicated the piece of music they most preferred and related images using the SD exercise. To perform our analyses, we also assessed acoustic characteristics of the three heartbeat sounds.Results: STUDY 1: In the music arranged for a music box, participants evaluated musical imagery as significantly more "airy," "comfortable," "feels good," "relaxing," "easy," "awake," and "amusing" when listening to music with a heartbeat sound, in comparison to the other two conditions (p < .05). STUDY 2: "Rocking the body" and "heard quietly and slept" were the infants' and toddlers' responses to the music with a heartbeat sound. Fifty-six parents (34.8%) preferred "pattern A" music, 47 (29.2%) preferred "pattern B," and 10 (6.3%) preferred "pattern C." In analysis of "pattern A" acoustics, the mean number of heartbeats per minute, mean heartbeat frequency, maximum heartbeat frequency, and heartbeat Pitch Period Perturbation Quotient (PPQ) were 58/min, 120.3 ± 32.8 Hz, 248.4 Hz, and 11.39%, respectively.Conclusion: This research suggests that a heartbeat sound effective for relaxation has a rhythm of 60 beats/min, low-frequency bandwidth (120–220 Hz), and low percentage of PPQ. Our studies also indicate that music arranged for a music box with a heartbeat sound might be beneficial for inducing relaxation.