Results 251 to 260 of about 1,880,232 (279)

Absolute model age of lunar Finsen crater and geologic implications

Icarus, 2021
Abstract As the primary source of materials measured inside of Von Karman crater by the Chang'e-4 rover, the absolute model age (AMA) of Finsen crater is derived by the crater size-frequency distribution (CSFD) measurements. Both cumulative and differential fits reveal an AMA of ~3.5 Ga, indicating Finsen crater is Imbrium-aged.
Sheng Gou, Zongyu Yue, Kaichang Di, Zhanchuan Cai, Zhaoqin Liu, Shengli Niu   +5 more
openaire   +3 more sources

Absolute model ages from lunar crater morphology

Journal of Geophysical Research: Planets, 2015
AbstractThe degradation state of an impact crater is an indicator of its age. Previous workers have used crater degradation states to estimate ages of surfaces or geomorphological features; one example is the degree of freshness method developed by Pohn and Offield ().
David Trang, Jeffrey J. Gillis‐Davis, Joseph M. Boyce   +2 more
openaire   +1 more source

Absolute model ages of three craters in the vicinity of the Chang'E-5 landing site and their geologic implications

Icarus, 2022
Abstract The Chang'E-5 (CE-5) mission has successfully collected lunar regolith samples from the northern Oceanus Procellarum. The Eratosthenian-aged mare units where the CE-5 landed on, might have been contaminated by distant ejecta delivered by several craters, such as Pythagoras, Sharp B, Harpalus, Copernicus, and other craters.
Hou, Xuting, Fu, Xiaohui, Qiao, Le, Li, Bo, Yin, Chengxiang, Zhang, Jiang, Ling, Zongcheng   +6 more
openaire   +1 more source

Geological mapping and absolute model ages around the Apollo 17 landing site

2019
This extended conference abstract describes geological mapping of the Apollo 17 landing site in the context of new crater size-frequency distribution measurements for determining absolute model ages.
Iqbal, Wajiha, van der Bogert, Carolyn H, Hiesinger, Harald   +2 more
openaire   +1 more source

Describing time and age variations in the risk of radiation-induced solid tumour incidence in the Japanese atomic bomb survivors using generalized relative and absolute risk models

Statistics in Medicine, 1999
Generalized relative and absolute risk models, in which various functions of time and age modify the excess relative or absolute risk of radiation-induced cancer, are fitted to the Japanese atomic bomb survivor cancer incidence data set. Among generalized relative risk models, those in which a product of powers of time since exposure and attained age ...
Little MP, Muirhead CR, Charles MW
openaire   +2 more sources

The construction of a reliable absolute chronology for the last two millennia in an anthropogenically disturbed peat bog: Limitations and advantages of using a radio-isotopic proxy and age–depth modelling

Quaternary Geochronology, 2015
14 C inversion abstract The main aim of this paper is to present the pitfalls connected with the construction of reliable chro- nologies for anthropogenically disturbed peatlands over the last two millennia based on 210 Pb and 14 C dating, i.e. the period of the strongest human impact on these ecosystems.
Barbara Fiałkiewicz-Kozieł, Piotr Kołaczek, Adam Michczyński, Natalia Piotrowska   +3 more
openaire   +1 more source

Detailed Geological Studies and Absolute Model Ages of the Apollo 15 Landing Site

 Introduction: The Apollo 15 landing site is one of the calibration points for the lunar cratering chronology, which compares crater size-frequency distribution (CSFD) measurements to lunar sample ages [e.g., 1-6]. Following our series of studies [7-10] of the lunar chronology using recent lunar mission and sample analysis data [11-15], we ...
Wajiha Iqbal, Carolyn van der Bogert, Harald Hiesinger   +2 more
openaire   +1 more source

Validation of the triple a model (age, absolute neutrophil count, absolute lymphocyte count) for the prediction of survival and thrombosis in 1000 patients with polycythemia vera

Leukemia & Lymphoma
Standard ELN risk stratification for thrombosis and overall survival (OS) in patients with polycythemia vera (PV) is based on advanced age and history of thrombosis. Recently, the triple A (AAA) risk model was developed for OS prediction in patients with essential thrombocythemia, which, besides rising age, incorporates high (≥8x109/L) absolute ...
Danijela Lekovic, Andrija Bogdanovic, Isidora Arsenovic, Jelena Ivanovic, Mirjana Cvetkovic, Jelica Jovanovic, Nataša Čolović, Marko Lucijanic, Ivan Krečak   +8 more
openaire   +2 more sources

New insights into lunar terrain properties and their effect on derivation of absolute model ages using Apollo landing sites

Icarus, 2023
Michelle R. Kirchoff, Simone Marchi
openaire   +1 more source

The Standard Model Big Bang Age of the Universe Confused for Special Relativity Absolute Time Dilation Barrier

There is a crisis with the standard model of cosmology at its outer limits. Why are developed galaxies rich in elements, as observed by the James Webb Space Telescope (JWST), existing only 300 million years from the beginning of the 13.8-billion-year-old universe?
openaire   +1 more source