Results 11 to 20 of about 2,549,711 (355)
The Astronomical Journal, 2023 The absolute age of a simple stellar population is of fundamental interest for a wide range of applications but is difficult to measure in practice, as it requires an understanding of the uncertainties in a variety of stellar evolution processes as well ...
Jiaqi (Martin) Ying +5 more
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Theoretical Uncertainties in the Subgiant--Mass Age Relation and the Absolute Age of Omega Cen [PDF]
, 2002 The theoretical uncertainties in the calibration of the relationship between the subgiant mass and age in metal-poor stars are investigated using a Monte Carlo approach.
Chaboyer, Brian, Krauss, Lawrence M.
core +5 more sources
On the absolute age of the Globular Cluster M92
, 2010 We present precise and deep optical photometry of the globular M92. Data were collected in three different photometric systems: Sloan Digital Sky Survey (g',r',i',z'; MegaCam@CFHT), Johnson-Kron-Cousins (B, V, I; various ground-based telescopes) and ...
Becucci, R. +17 more
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Absolute Age of Euxenite from Antarctica
Antarctic Record, 1961 南極地方Lutzow-Holm Bayの東海岸,Skallen地区に見出された花崗岩ペグマタイト中の強放射性鉱物,ユークセン石の年令決定を鉛法により行ない,Pb-206/U-238,Pb-207/U-235,Pb-208/Th-232,Pb-207/Pb-206の比を測定することによって年令を算出した.従来,しばしば異常な値を示すと考えられているPb-208/Th-232の比を除けは,他の三つの比から得られる年令は相当によい一致を示し,平均約470×10^5年程度である.最近AHRENSらは著者の一人 ...
Nobufusa SAITO +2 more
doaj +2 more sources
‘Absolute’ Age: a Meaningless Term [PDF]
Nature, 1962 I WISH to appeal to my fellow geologists and workers in the rapidly growing subject of geochronology to discontinue a habit or fashion which is both unnecessary and misleading. I refer to the habit of calling radiometric ages ‘absolute’ ages. An age does not become ‘absolute’ by virtue of being expressed in units of time such as a year.
openaire +3 more sources
Tephrochronology and Absolute Age Determination
The Quaternary Research (Daiyonki-Kenkyu), 1967 Most tephrochronological studies based upon absolute ages are derived from historical records of eruption and radiocarbon dates from Holocene and Pleistocene times. However, unless associated with some organic matters whose ages are younger than 35, 000 years old, tephra layers usually could not be dated.Recently Kigoshi explored the possibility that ...
Kunio Kobayashi
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Informatics in Medicine Unlocked, 2023 Background: Combined polypharmacy treatments of multi-diseases like diabetes mellitus type 2 (DMT2) with its comorbidities could lead to serious adverse reactions (ADR) due to drug-drug interactions (DDIs).
Adnan Kulenovic +1 more
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Stratigraphical evidence of Baltic water level changes between 8 and 6 ka BP in a small lake basin on the coast of the Gulf of Finland, SE Finland [PDF]
Bulletin of the Geological Society of Finland, 1997 A sediment core from Lake Saarasjärvi at 19.5 m a.s.l. in Virolahti near the coast of the Gulf of Finland, SE Finland, was studied for lithology and diatom stratigraphy.
A. Miettinen, H. Hyvärinen
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Quaternary chronostratigraphy - a review [PDF]
Bulletin of the Geological Society of Finland, 1992 Quaternary development is characterized by strong climatic fluctuations associated with repeated glacier expansions. Consequently the Quaternary chronostratigraphy is largely based on the dating of climatic fluctuations which have led to large-scale ...
M. Eronen
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1.90-1.88 Ga arc and back-arc basin in the Orijärvi area, SW Finland [PDF]
Bulletin of the Geological Society of Finland, 2002 The Orijärvi area within the Uusimaa Belt is a key area in resolving the stratigraphy and tectonic setting of the Southern Svecofennian Arc Complex in southern Finland.
M. Väisänen, I. Mänttäri
doaj +1 more source