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  • Articles  (4)
  • International Journal of Environmental Research and Public Health  (2)
  • Journal of Geophysical Research JGR - Space Physics  (2)
  • 52459
  • 7531
  • 1
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    Storm-time evolution of ELF/VLF waves observed by DEMETER satellite (2014)
    Wiley-Blackwell
    Details
    Publication Date: 2014-03-21
    Description: In this paper, using the data of sunsynchronous satellite DEMETER, we investigated the storm-time variations of ELF/VLF waves during the intense CME-driven storms from 2005 to 2009. The results show that there is a good correlation between the enhancement of ELF/VLF waves and the CME events. Immidately following the enhanced wave activity driven by CMEs during the initial phase, the wave intensity decreases temporarily at the beginning of storm main phase. The strongest waves predominantly occur from the late main phase to early recovery phase. The ELF waves below 3 kHz are significantly intensified during the whole storm time, while the high-frequency waves above 3 kHz seem strengthened only during the late main and early recovery phase. The ELF waves below 3 kHz can exist in a wide L-shell range, with the intensity peaking at L ~ 3-4. High-frequency waves at f  〉 9 kHz exist mostly outside the plasmapause. The stronger ELF/VLF waves on the dayside can last longer time than those on the nightside.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley-Blackwell on behalf of American Geophysical Union (AGU).
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  • 2
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    IJERPH, Vol. 14, Pages 1556: Investigating Lushan Earthquake Victims’ Individual Behavior Response and Rescue Organization (2017)
    MDPI Publishing
    Details
    Publication Date: 2017-12-12
    Description: IJERPH, Vol. 14, Pages 1556: Investigating Lushan Earthquake Victims’ Individual Behavior Response and Rescue Organization International Journal of Environmental Research and Public Health doi: 10.3390/ijerph14121556 Authors: Peng Kang Yipeng Lv Qiangyu Deng Yuan Liu Yi Zhang Xu Liu Lulu Zhang Research concerning the impact of earthquake victims’ individual behavior and its association with earthquake-related injuries is lacking. This study examined this relationship along with effectiveness of earthquake rescue measures. The six most severely destroyed townships during the Lushan earthquake were examined; 28 villages and three earthquake victims’ settlement camp areas were selected as research areas. Inclusion criteria comprised living in Lushan county for a longtime, living in Lushan county during the 2013 Lushan earthquake, and having one’s home destroyed. Earthquake victims with an intellectual disability or communication problems were excluded. The earthquake victims (N (number) = 5165, male = 2396) completed a questionnaire (response rate: 94.7%). Among them, 209 were injured (5.61%). Teachers (p < 0.0001, OR (odds ratios) = 3.33) and medical staff (p = 0.001, OR = 4.35) were more vulnerable to the earthquake than were farmers. Individual behavior was directly related to injuries, such as the first reaction after earthquake and fear. There is an obvious connection between earthquake-related injury and individual behavior characteristics. It is strongly suggested that victims receive mental health support from medical practitioners and the government to minimize negative effects. The initial reaction after an earthquake also played a vital role in victims’ trauma; therefore, earthquake-related experience and education may prevent injuries. Self-aid and mutual help played key roles in emergency, medical rescue efforts.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
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  • 3
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    IJERPH, Vol. 15, Pages 997: Insufficient Sleep Duration and Overweight/Obesity among Adolescents in a Chinese Population (2018)
    MDPI Publishing
    Details
    Publication Date: 2018-05-16
    Description: IJERPH, Vol. 15, Pages 997: Insufficient Sleep Duration and Overweight/Obesity among Adolescents in a Chinese Population International Journal of Environmental Research and Public Health doi: 10.3390/ijerph15050997 Authors: Qing-Hai Gong Si-Xuan Li Hui Li Jun Cui Guo-Zhang Xu Objectives: The objective of this study was to investigate the relationship between sleep duration and overweight/obesity among Chinese adolescents. Methods: A school-based cross-sectional study was conducted among Chinese adolescents in 2016. In total, 2795 school-aged Chinese children aged 12 to 13 years participated in this study. Participants were asked to complete self-administered surveys during a 45-min class period in their classroom. Details of the questionnaire about health-related behaviors included sleep habits, physical activity, screen time, cigarette use, and alcohol use. Height, weight, waist circumference and hip circumference were directly measured. Results: The mean sleep duration was 8.7 h/day. In total, 43.0% of the participants had a sleep duration of less than 9 h/day. Sleep duration was significantly inversely related to BMI, waist circumference, hip circumference and WHtR in multiple linear regression analyses in both genders. Logistic regression models showed that insufficient sleep (<9 h/day) was associated with high odds of overweight/obesity among both young boys and girls. Conclusions: Insufficient sleep duration was associated with overweight/obesity in Chinese adolescents, and short sleep duration was probably associated with central adiposity, especially among boys.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
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  • 4
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    Whistler-mode wave generation at the edges of a magnetic dip structure (2015)
    Wiley-Blackwell
    Details
    Publication Date: 2015-03-04
    Description: On 18 May 2011, the Time History of Events and Macroscale Interactions during Substorms (THEMIS) satellite observed whistler-mode waves associated with a magnetic dip behind a dipolarization front (DF) structure in the bursty bulk flow (BBF) braking region. For the first time, we find that whistler-mode waves are generated at the edges of magnetic dip, rather than at the center (also known as “minimum- B -pocket”). Detailed wave analysis indicates that the waves are likely lower and upper band whistler-mode chorus. We examine electron pitch angle distributions at the edges of dip, and compare them with those at the center and far outside the magnetic dip. Results confirm that the positive temperature anisotropy and pancake distributions at the edges of magnetic dip provide free energy source for growth of the whistler-mode waves. We also interpret the whole physical process of how whistler-mode waves generate in this event.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley-Blackwell on behalf of American Geophysical Union (AGU).
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