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Time series study of a 17-year record of 7Be and 210Pb fluxes in northern Taiwan using ensemble empirical mode decomposition

Thu, 23 Apr 2026 06:27:12 GMT

title: Time series study of a 17-year record of 7Be and 210Pb fluxes in northern Taiwan using ensemble empirical mode decomposition abstract: 摘要： Using the ensemble empirical mode decomposition (EEMD) and a significance test method, we have analyzed time series data on the fluxes of (7)Be and (210)Pb collected over a span of 17 y in Northern Taiwan. Among nine intrinsic mode functions (IMFs) extracted from the method five (IMF4-8) are non-trivial for (210)Pb and have adequate S/N with significant power in localized windows around the periodicities of 0.5 y, 1 y, 2 y, 5 y, and 11 y, respectively. For (7)Be, IMF5 and IMF8 with periods around 1 y and 11 y, respectively, have adequate S/N. The semi-annual and annual cycles represented by IMF4 and IMF5, respectively, are dominated by East Asian monsoon. The sum of IMF6 and IMF7 reveals an inter-annual cycle where both (7)Be and (210)Pb fluxes are well-correlated with the East Asian winter monsoon index (EAWMI). The close tracking of the (210)Pb and (7)Be in IMF8 cases may reflect an 11 y cycle; implying that it is caused by common climatologic factors, likely related to solar cycle, rather than their distinct production modes. 其他題名： J Environ Radioact 出版者： England 出版日期： 2015-09 出處： Journal of environmental radioactivity, 2015-09, Vol.147, p.14 版權： Copyright © 2015 Elsevier Ltd. All rights reserved. 識別號： EISSN: 1879-1700 識別號： DOI: 10.1016/j.jenvrad.2015.04.017 識別號： PMID: 26005772

The APOE e{open}4 allele affects complexity and functional connectivity of resting brain activity in healthy adults

Thu, 23 Apr 2026 06:27:06 GMT

title: The APOE e{open}4 allele affects complexity and functional connectivity of resting brain activity in healthy adults abstract: 摘要： The apolipoprotein E (APOE) gene is associated with structural and functional brain changes. We have used multiscale entropy (MSE) analysis to detect changes in the complexity of resting blood oxygen level-dependent (BOLD) signals associated with aging and cognitive function. In this study, we further hypothesized that the APOE genotype may affect the complexity of spontaneous BOLD activity in younger and older adults, and such altered complexity may be associated with certain changes in functional connectivity. We conducted a resting-state functional magnetic resonance imaging experiment in a cohort of 100 younger adults (aged 20-39 years; mean 27.2±4.3 years; male/female: 53/47) and 112 older adults (aged 60-79 years; mean 68.4±6.5 years; male/female: 54/58), and applied voxelwise MSE analysis to assess the main effect of APOE genotype on resting-state BOLD complexity and connectivity. Although the main effect of APOE genotype on BOLD complexity was not observed in younger group, we observed that older APOE 4 allele carriers had significant reductions in BOLD complexity in precuneus and posterior cingulate regions, relative to noncarriers. We also observed that reduced BOLD complexity in precuneus and posterior cingulate regions was associated with increased functional connectivity to the superior and inferior frontal gyrus in the older group. These results support the compensatory recruitment hypothesis in older APOE 4 carriers, and confer the impact of the APOE genotype on the temporal dynamics of brain activity in older adults. Hum Brain Mapp 35:3238-3248, 2014. © 2013 Wiley Periodicals, Inc. [PUBLICATION ABSTRACT] 出版者： San Antonio: John Wiley & Sons, Inc 出版日期： 2014-07-01 出處： Human brain mapping, 2014-07, Vol.35 (7), p.3238-3248 資源來源： Alma/SFX Local Collection 版權： Copyright © 2013 Wiley Periodicals, Inc. 識別號： ISSN: 1065-9471 識別號： EISSN: 1097-0193 識別號： DOI: 10.1002/hbm.22398

Suicide and media reporting: A longitudinal and spatial analysis

Thu, 23 Apr 2026 06:26:59 GMT

title: Suicide and media reporting: A longitudinal and spatial analysis abstract: 摘要： Purpose The impact of media reporting on copycat suicides has been well established in various cases of celebrity suicide. However, knowledge is limited about the spatial and temporal relationship between suicide death and media reporting over a long period of time. This study investigated the association of suicide deaths with suicide news in longitudinal and spatial dimensions. Methods All suicides during 2003–2010 ( n = 31,364) were included. Suicide news in the study period was retrieved from Google News, and included all available news media in Taiwan. Empirical mode decomposition was used to identify the main intrinsic oscillation, reflecting both major and minor suicide events, and time-dependent intrinsic correlation was used to quantify the temporal correlation between suicide deaths and suicide news. Results The media reporting of suicide was synchronized with increased suicide deaths during major suicide events such as celebrity death, and slightly lagged behind the suicide deaths for 1 month in other periods without notable celebrity deaths. The means of suicide reported in the media diversely affected the suicide models. Reports of charcoal burning suicide exhibited an exclusive copycat effect on actual charcoal burning deaths, whereas media reports of jumping had a wide association with various suicide models. Media reports of suicide had a higher association with suicide deaths in urban than in rural areas. Conclusions This report suggested that a delayed effect of copycat suicide may exist in media reports of minor suicide events. The competitive reporting of minor suicide events must be avoided and addressed by media professionals. 其他題名： Soc Psychiatry Psychiatr Epidemiol 出版者： Berlin/Heidelberg: Springer-Verlag 出版日期： 2013-03-01 出處： Social Psychiatry and Psychiatric Epidemiology, 2013-03, Vol.48 (3), p.427-435 資源來源： EBSCOhost Academic Search Premier 版權： Springer-Verlag 2012 版權： 2015 INIST-CNRS 版權： COPYRIGHT 2013 Springer 版權： Springer-Verlag Berlin Heidelberg 2013 識別號： ISSN: 0933-7954 識別號： ISSN: 1433-9285 識別號： EISSN: 1433-9285 識別號： DOI: 10.1007/s00127-012-0562-1 識別號： PMID: 22878833 識別號： CODEN: SPPEEM

Scale-dependent intrinsic entropies of complex time series

Thu, 23 Apr 2026 06:26:55 GMT

title: Scale-dependent intrinsic entropies of complex time series abstract: 摘要： Multi-scale entropy (MSE) was developed as a measure of complexity for complex time series, and it has been applied widely in recent years. The MSE algorithm is based on the assumption that biological systems possess the ability to adapt and function in an ever-changing environment, and these systems need to operate across multiple temporal and spatial scales, such that their complexity is also multi-scale and hierarchical. Here, we present a systematic approach to apply the empirical mode decomposition algorithm, which can detrend time series on various time scales, prior to analysing a signal’s complexity by measuring the irregularity of its dynamics on multiple time scales. Simulated time series of fractal Gaussian noise and human heartbeat time series were used to study the performance of this new approach. We show that our method can successfully quantify the fractal properties of the simulated time series and can accurately distinguish modulations in human heartbeat time series in health and disease. 其他題名： Phil. Trans. R. Soc. A 其他題名： Philos Trans A Math Phys Eng Sci 出版者： England: The Royal Society Publishing 出版日期： 2016-04-13 出處： Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences, 2016-04, Vol.374 (2065), p.20150204-20150204 資源來源： JSTOR Life Sciences Collection 版權： 2016 The Author(s) 版權： 2016 The Author(s). 識別號： ISSN: 1364-503X 識別號： ISSN: 1471-2962 識別號： EISSN: 1471-2962 識別號： DOI: 10.1098/rsta.2015.0204 識別號： PMID: 26953181