Results 31 to 40 of about 4,738,629 (286)

Discretizations of a perturbed logistic equation

Discrete Dynamics in Nature and Society, 2000
The logistic equation has been used to model a population where the intrinsic rate of growth is a linearly decreasing function of the population density.
Miguel Angel Moreles, francisco Solis
doaj   +1 more source

Science Students’ Spontaneous Utilization of School Library with Logistic Growth Model: A Focus on Gender

Malikussaleh Journal of Mathematics Learning, 2021
In this paper the logistic growth model of spontaneous utilization of school library in Imo State, is presented. First‐order variables separable logistic equation is solved.
Chinedu Victor Obasi
doaj   +1 more source

Application of generalized logistic equation for b-value analysis in fracture of plain concrete beams under flexure

Engineering Fracture Mechanics, 2019
This work investigates the effect of finite size and evolution of fracture process zone on b-value of acoustic emission in concrete beams. It is shown that the AE b-value determined using the Gutenberg-Richter (GR) law varies with beam size and ...
N. Burud, J. Kishen
semanticscholar   +1 more source

Logistic equation on time scales

Examples and Counterexamples
We propose a new dynamic logistic equation that, in contrast with the one available in the literature, preserves the non-negativity of its solutions, which is an essential property for biological meaning.
Márcia Lemos-Silva, Delfim F.M. Torres
doaj   +1 more source

Introducing time delay in the evolution of new technology: the case study of nanotechnology

Journal of the Mechanical Behavior of Materials, 2013
Starting with Feynman’s “There’s Plenty of Room at the Bottom” prophetic lecture at Caltech in the 1960s, the term “nanotechnology” was first coined in the scientific literature in the 1980s.
Georgalis Evangelos E., Aifantis Elias C.   +1 more
doaj   +1 more source

Logistic Function as a Tool of Planning

Foundations of Management, 2014
In the present paper, we propose a new approach to investigate the logistic function, which is commonly used in mathematical models in economics and management.
Rządkowski Grzegorz, Głażewska Iwona, Sawińska Katarzyna   +2 more
doaj   +1 more source

Fractional-Order Logistic Differential Equation with Mittag–Leffler-Type Kernel

Fractal and Fractional, 2021
In this paper, we consider the Prabhakar fractional logistic differential equation. By using appropriate limit relations, we recover some other logistic differential equations, giving representations of each solution in terms of a formal power series ...
Iván Area, Juan J. Nieto
doaj   +1 more source

On the fractional-order logistic equation

Applied Mathematics Letters, 2007
The authors investigate the fractional-order logistic equation. They study the stability, existence, uniqueness and numerical approximation of a solution.
A. M. A. El-Sayed, A. E. M. El-Mesiry, H. A. A. El-Saka   +2 more
openaire   +2 more sources

Misperception of Body Weight After Childhood Cancer

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Misperception of body weight can negatively impact the weight management efforts of childhood cancer survivors (CCSs). Both being overweight or underweight are associated with chronic health conditions commonly observed in CCS; therefore, accurate weight perception is critical for reducing long‐term health risks.
Fabiën N. Belle, Tomáš Sláma, Eva Haegler‐Laube, Reto D. Kurmann, Gabriela M. Kuster, Christoph Saner, Eva Scheler, Yara Shoman, Christina Schindera   +8 more
wiley   +1 more source

Clinical, Histopathological, and Molecular Characterization of Pediatric MN1::ZNF341‐Associated Cancer

Pediatric Blood &Cancer, EarlyView.
ABSTRACT A lethal round‐cell malignancy with an MN1::ZNF341 fusion has recently been reported in three infants. Here, we describe four further tumors, three in newborns (including monozygotic twins), and one in an adolescent. Detailed clinical, radiological, and histopathological data differentiate these tumors from their main mimics, neuroblastoma and
Thomas R. W. Oliver, Dyanne Rampling, Barbara Walkowiak, Nathaniel D. Anderson, Manas Dave, Henry Lee‐Six, Sadie Baskind, Pooja Balasubramanian, Glenn Anderson, Conor Parks, Toochi Ogbonnah, Emilia R. Robertson, Simon Hannam, Rohan Verma, John C. Achermann, Liina Palm, Neil Sebire, Thomas Jacques, Tom Watson, Carryl Dryden, Karin Straathof, Mette Jorgensen, Olga Slater, Sam Behjati, Sarita Depani, J. Ciaran Hutchinson   +25 more
wiley   +1 more source