Results 131 to 140 of about 968,798 (349)

An arithmetic term for the factorial function

Examples and Counterexamples
As proved by Marchenkov and Mazzanti, every Kalmar function can be represented by arithmetic terms. We display one of such terms to represent the factorial function, and as a consequence, we get an example of an arithmetic term which represents a ...
Mihai Prunescu, Lorenzo Sauras-Altuzarra
doaj  

Singular relations between certain arithmetical functions [PDF]

, 1931
E. T. Bell
openalex   +1 more source

Dirichlet product of derivative arithmetic with an arithmetic function multiplicative [PDF]

arXiv, 2019
We define the derivative of an integer to be the map sending every prime to 1 and satisfying the Leibniz rule. The aim of this article is to calculate the Dirichlet product of this map with a function arithmetic multiplicative.
arxiv  

Transport Resistance Dominates the Fill Factor Losses in Record Organic Solar Cells

Advanced Energy Materials, EarlyView.
Organic photovoltaics are a promising solar cell technology, but even the record devices with 20% efficiency have significant fill factor losses due to low active layer conductivities. In this Perspective, the authors describe the origin of these losses, discuss experimental methods for their quantification, and explain how to minimize them to optimize
Chen Wang, Roderick C. I. MacKenzie, Uli Würfel, Dieter Neher, Thomas Kirchartz, Carsten Deibel, Maria Saladina   +6 more
wiley   +1 more source

Arithmetic in the developing brain: A review of brain imaging studies

Developmental Cognitive Neuroscience, 2018
Brain imaging studies on academic achievement offer an exciting window on experience-dependent cortical plasticity, as they allow us to understand how developing brains change when children acquire culturally transmitted skills. This contribution focuses
Lien Peters, Bert De Smedt
doaj  

Modular Calabi-Yau fourfolds and connections to M-theory fluxes

Journal of High Energy Physics
In this work, we study the local zeta functions of Calabi-Yau fourfolds. This is done by developing arithmetic deformation techniques to compute the factor of the zeta function that is attributed to the horizontal four-form cohomology.
Hans Jockers, Sören Kotlewski, Pyry Kuusela   +2 more
doaj   +1 more source

On the Average Value of Arithmetic Functions [PDF]

, 1948
Richard Bellman
openalex   +1 more source

Increasing sedentary time, minimum dietary energy requirements, and food security assessment

Applied Economic Perspectives and Policy, EarlyView.
Abstract We compute corrections for sedentary behavior in physical activity levels (PALs) and incorporate them along with corrections for over estimation of basal metabolic rates (BMRs) into threshold caloric intakes, known as minimum dietary energy requirements (MDERs).
Jacob Michels, Yacob Abrehe Zereyesus, John Beghin   +2 more
wiley   +1 more source

Correlation tests between relative light unit and colony forming unit for improving adenosine triphosphate bioluminescence analysis in bacterial consolidation treatments on palaeontological heritage

Luminescence, Volume 37, Issue 12, Page 2129-2138, December 2022., 2022
Bacterial mineralization treatments can be effective, nontoxic, environmentally friendly, and chemically compatible with fossil heritage. However, accurate monitoring should be carried out to detect bacteria viability during and after treatments. Adenosine triphosphate (ATP) assay is proposed as a fast, affordable, portable, and easy‐to‐use system for ...
Silvia Marín‐Ortega, M. Àngels Calvo i Torras, Manuel Ángel Iglesias‐Campos   +2 more
wiley   +1 more source

The sum of a hybrid arithmetic function over a sparse sequence

AIMS Mathematics
Let $ \lambda_{f}(n) $ be the $ n $-th normalized Fourier coefficient of $ f $, which is a primitive holomorphic cusp form of even integral weight $ k\geq2 $ for the full modular group $ SL_2(\mathbb{Z}) $.
Huafeng Liu, Rui Liu
doaj   +1 more source