نتایج جستجو برای: chronometer

تعداد نتایج: 254  

Journal: :Journal of Cosmology and Astroparticle Physics 2022

Abstract A powerful test of fundamental physics consists on probing the variability constants in Nature. Although they have been measured Earth laboratories and our Solar neighbourhood with extremely high precision, it is crucial to carry out these tests at distant Universe, as any significant variation quantities would immediately hint new physics. We perform a cosmological measurement speed l...

Journal: :Astrophysical Journal Supplement Series 2023

Gaussian Process (GP) has gained much attention in cosmology due to its ability reconstruct cosmological data a model-independent manner. In this study, we compare two methods for GP kernel selection: Approximate Bayesian Computation (ABC) Rejection and nested sampling. We analyze three types of data: cosmic Chronometer (CC), Type Ia Supernovae (SNIa), Gamma Ray Burst (GRB), using five function...

Journal: :Physical review 2022

We show that the ${H}_{0}$ tension can be alleviated in framework of Horndeski/generalized Galileon gravity. In particular, since terms depending on ${G}_{5}$ control friction Friedmann equation, we construct specific subclasses which it depends only field's kinetic energy. Since latter is small at high redshifts, namely redshifts affected CMB structure, deviations from $\mathrm{\ensuremath{\La...

Journal: :Nuclear Physics B 2022

In this work we perform an observational data analysis on Einsteinian cubic gravity and f(P) with the objective of constraining parameter space theories. We use 30 point z−H(z) cosmic chronometer as tool for our along BAO CMB peak parameters. The χ2 statistic is used fitting it minimized to obtain best fit values free model have Markov chain Monte Carlo algorithm bounds To achieve publicly avai...

Journal: :Revista de Agricultura Neotropical 2022

Agricultural productivity in irrigated areas depends on several factors, including the design and maintenance of irrigation systems. Excessive or insufficient applications water affect plant growth development, hence agricultural productivity. For this reason, evaluation system is essential to avoid loss during application. This study aimed evaluate efficiency uniformity a subsurface drip sugar...

2008
Gary Steigman

The early universe provides a unique laboratory for probing the frontiers of particle physics in general and neutrino physics in particular. The primordial abundances of the relic nuclei produced during the first few minutes of the evolution of the Universe depend on the electron neutrinos through the chargedcurrent weak interactions among neutrons and protons (and electrons and positrons and n...

2017
Andrew M. Smith Miten Jain Logan Mulroney Daniel R. Garalde

The ribosome small subunit is expressed in all living cells. It performs numerous essential functions during translation, including formation of the initiation complex and proofreading of base-pairs between mRNA codons and tRNA anticodons. The core constituent of the small ribosomal subunit is a ~1.5 kb RNA strand in prokaryotes (16S rRNA) and a homologous ~1.8 kb RNA strand in eukaryotes (...

2007
Edgar Rey Sanabria

Objective: The aim of this study was to evaluate the heart and respiration rates, mean arterial pressure, temperature and peripheral oxygen saturation of low-weight preterm newborns, before and after the application of kangaroo mother care. Method: Twenty-two healthy low-weight preterm newborns of both sexes were studied. None of them had neurological, cardiac and/or respiratory deficiencies. A...

2003
D. P. Glavin G. W. Lugmair

Introduction: The Mn-Cr analyses of several H chondrites including Forest Vale, Dimmitt, Ste Mar-guerite and Richardton [1-3], have all shown reasonable agreement between the obtained 'Mn-Cr ages' and the known Pb-Pb ages determined on phosphates. These studies imply that the best fit lines in the 53 Mn-53 Cr evolution plots for these meteorites are isochrons rather than mixing lines and that t...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید