Results 11 to 20 of about 386,403 (270)

Understanding Periodic and Non-periodic Chemistry in Periodic Tables [PDF]

open access: yesFrontiers in Chemistry, 2021
The chemical elements are the “conserved principles” or “kernels” of chemistry that are retained when substances are altered. Comprehensive overviews of the chemistry of the elements and their compounds are needed in chemical science. To this end, a graphical display of the chemical properties of the elements, in the form of a Periodic Table, is the ...
Changsu Cao   +5 more
openaire   +3 more sources

Periodic Behaviors [PDF]

open access: yesSIAM Journal on Control and Optimization, 2010
This paper studies behaviors that are defined on a torus, or equivalently, behaviors defined in spaces of periodic functions, and establishes their basic properties analogous to classical results of Malgrange, Palamodov, Oberst et al. for behaviors on R^n. These properties - in particular the Nullstellensatz describing the Willems closure - are closely
Napp, Diego   +2 more
openaire   +2 more sources

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

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

Inductance Characteristic Analysis of Consequent-Pole Permanent Magnet In-Wheel Motor

open access: yesIEEE Access, 2019
This paper presents inductance characteristics analysis of the consequent-pole permanent magnet in-wheel motor (CPM). Considering the specialty of consequent-pole structure, this paper analyzes the change rule of the winding self-inductance via ...
Hui Ma   +3 more
doaj   +1 more source

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