Results 1 to 10 of about 471,211 (204)

Statistical age determination of tree rings.

open access: yesPLoS ONE, 2020
Dendrochronology, the study of annual rings formed by trees and woody plants, has important applications in research of climate and environmental phenomena of the past.
Martin Ricker   +3 more
doaj   +4 more sources

Current Star Formation in the Outer Rings among Early-type Disk Galaxies

open access: yesOpen Astronomy, 2015
We use ARRAKIS, the atlas of stellar rings in galaxies (Comerón et al. 2014), based on data of the S4G survey, to compile a list of early-type, S0-Sb, disk galaxies with outer stellar ring-like features (‘pure’ rings, R, or pseudorings, R′).
Kostiuk I. P., Sil’chenko O. K.
doaj   +3 more sources

THE FIRST REPORT OF ABNORMAL AGE RINGS IN OTOLITHS LAPILLUS OF ARIIDS CATFISH

open access: yesBoletim do Instituto de Pesca, 2021
The present work aimed to record the first presence of abnormal age rings in Cathorops spixii lapillus otoliths from Cananeia-Iguape Estuarine-Lagoon Complex (CIELC), Southern region of Brazilian coast. In August 2018, 59 specimens of C.
Igor Souza de MORAIS   +1 more
doaj   +3 more sources

The Milky Way’s middle-aged inner ring [PDF]

open access: yesAstronomy & Astrophysics, 2022
Aims. We investigate the metallicity, age, and orbital anatomy of the inner Milky Way, specifically focussing on the outer bar region. Methods. We integrated a sample of APOGEE DR16 inner Galaxy stars in a state of the art bar-bulge potential with a slow pattern speed and investigated the link between the resulting orbits and their [Fe/H] and ages.
Shola M. Wylie   +2 more
openaire   +3 more sources

First record of growth rings for 11 native subtropical anuran species of South America [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2019
: Skeletochronology is the most accurate method to estimate a population age structure. The methodology is based on the analysis of secondary bone tissue in order to count growth rings.
AMANDA J.C. BRUM   +3 more
doaj   +1 more source

Age of Gossip on Generalized Rings

open access: yesMILCOM 2023 - 2023 IEEE Military Communications Conference (MILCOM), 2023
We consider a gossip network consisting of a source forwarding updates and $n$ nodes placed geometrically in a ring formation. Each node gossips with $f(n)$ nodes on either side, thus communicating with $2f(n)$ nodes in total. $f(n)$ is a sub-linear, non-decreasing and positive function. The source keeps updates of a process, that might be generated or
Srivastava, Arunabh, Ulukus, Sennur
openaire   +2 more sources

Predicting circuit aging using ring oscillators [PDF]

open access: yes2014 19th Asia and South Pacific Design Automation Conference (ASP-DAC), 2014
This paper presents a method for inferring circuit delay shifts due to bias temperature instability using ring oscillator (ROSC) sensors. This procedure is based on presilicon analysis, postsilicon ROSC measurements, a new aging analysis model called the Upperbound on fMax (UofM), and a look-up table that stores a precomputed degradation ratio that ...
Deepashree Sengupta   +1 more
openaire   +1 more source

The origins of money: Calculation of similarity indexes demonstrates the earliest development of commodity money in prehistoric Central Europe.

open access: yesPLoS ONE, 2021
The origins of money and the formulation of coherent weight and measurement systems are amongst the most significant prehistoric developments of the human intellect.
Maikel H G Kuijpers, Cătălin N Popa
doaj   +1 more source

Energetic impact of reconstructed debris flow on the intensity and duration of growth disturbances in tree rings

open access: yesFrontiers in Earth Science, 2023
A rare study on the quantitative relationship between the energetic impact of debris flows on the intensity and duration of growth disturbances of tree rings was carried out, partly due to a lack of feasible approaches and detailed field evidence.
Xueliang Wang   +15 more
doaj   +1 more source

Age estimation by cemental annulation rings

open access: yesJournal of Forensic Dental Sciences, 2018
Tooth plays a pivotal role in the identification of a person when all other remains are ruined by natural or unnatural causes. Dental evidence can contribute to age estimation in forensic dentistry. Estimating the age of an individual with the help of a tooth for identification proves beneficial.
Mohan, N.   +2 more
openaire   +3 more sources

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