Results 21 to 30 of about 389,286 (287)

Temporal Analysis of Ground Movement at a Metal Mine in China

open access: yesRemote Sensing, 2022
Mining-induced ground movement is a complicated nonlinear process and a regional geological hazard. Time series in Earth sciences are often characterized as self-affine, long-range persistent, where the power spectra exhibit a power-law dependence on ...
Guang Li, Xin Hui, Fengshan Ma, Jie Guo
doaj   +1 more source

The chronobiology of migraine: a systematic review

open access: yesThe Journal of Headache and Pain, 2021
Background The paroxysmal nature of migraine is a hallmark of the disease. Some patients report increased attack frequency at certain seasons or towards the end of the week, while others experience diurnal variations of migraine attack onset.
Amanda Holmen Poulsen   +3 more
doaj   +1 more source

Distribution of histopathological types of thyroid tumors in 1999-2015 compared to 1966-1988 year period [PDF]

open access: yesArchive of Oncology, 2020
Background: The most common thyroid tumors originate from the epithelial follicular cells. Etiology involved in the development of thyroid carcinoma is multifactorial, including external influences and genetic predisposition.
Makazlieva Tanja   +3 more
doaj  

Influence of atmospheric pressure change on gas sampling in mine closed area

open access: yes矿业科学学报, 2020
The variation of atmospheric pressure will cause the exchange of air volume between the closed area of the mine and the external environment, which will have an impact on the gas migration in the closed area of the mine.In order to study the influence of
Lei Baiwei   +3 more
doaj   +1 more source

Effect of Latitude on Seasonality of Tuberculosis, Australia, 2002–2011

open access: yesEmerging Infectious Diseases, 2012
Seasonal variation in tuberculosis diagnoses recently has been reported in various populations. In Australia, seasonality of tuberculosis diagnoses was more pronounced in areas where UV exposure is reduced and vitamin D deficiency is more prevalent.
Jennifer H. MacLachlan   +2 more
doaj   +1 more source

On the Compton clock and the undulatory nature of particle mass in graphene systems [PDF]

open access: yes, 2015
In undulatory mechanics the rest mass of a particle is associated to a rest periodicity known as Compton periodicity. In carbon nanotubes the Compton periodicity is determined geometrically, through dimensional reduction, by the circumference of the ...
Dolce, Donatello, Perali, Andrea
core   +2 more sources

Natural catastrophes and point-like processes Data handling and prevision

open access: yesAnnals of Geophysics, 1998
A frequent approach when attempting to manage a natural catastrophe is in terms of a numerical model, by which we try to forecast its occurrence in space and time. But, sometimes this is difficult or even unrealistic.
G. P. Gregori
doaj   +1 more source

Erratum: Point-to-Periodic and Periodic-to-Periodic Connections [PDF]

open access: yesBIT Numerical Mathematics, 2004
This addition includes a list of essential corrections to the authors' paper [ibid. 44, No.~1, 41--62 (2004; Zbl 1052.65113)].
Dieci, Luca, Rebaza, Jorge
openaire   +1 more source

Looking after grandchildren: gender differences in 'when,' 'what,' and 'why': Evidence from the English Longitudinal Study of Ageing

open access: yesDemographic Research, 2020
Background: Grandparents play a vital role in providing childcare to families. However, little is known about when grandmothers and grandfathers look after grandchildren, what they do with them, and why.
Giorgio Di Gessa   +2 more
doaj   +1 more source

Periodicity Detection of the Substitution Box in the CBC Mode of Operation: Experiment and Study

open access: yesIEEE Access, 2023
This paper presents a technique for investigating the cyclic properties of substitution boxes (S-boxes) in the Cipher Block Chaining (CBC) mode of operation.
Zhanna Alimzhanova   +2 more
doaj   +1 more source

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