Results 11 to 20 of about 7,409,427 (228)

Solución Numérica de la Ecuación Diferencial de Von Bertalanffy

open access: yesRevista de Ciencias, 1998
En este artículo presentaremos las soluciones numéricas de la. ecuación diferencial de VON BERTALANFFY.
Jorge Rodriguez   +2 more
doaj   +2 more sources

Social relations: Building on Ludwig von Bertalanffy [PDF]

open access: yesSystems research and behavioral science, 2019
Ludwig von Bertalanffy did not leave us a legacy of a social systems theory. Nonetheless, reconstructing his general approach to systems provides us with several ideas on how to build a theory of social systems.
W. Hofkirchner
semanticscholar   +2 more sources

Viktor Hamburger to Ludwig von Bertalanffy, July 31, 1952 [PDF]

open access: yes, 1952
Invitation to Bertalanffy to give a lecture at Washington University with funds from the Sigma Xi ...
Hamburger, Viktor, 1900-2001
core   +6 more sources

SOME NEW RESULTS OF A FRACTIONAL VON BERTALANFFY MODEL

open access: yesE-Jurnal Matematika, 2023
In this article, we review the deterministic and perturbed Von Bertalanffy model that has been developing to discuss the existence and uniqueness results of the model.
AVAN AL-SAFFAR
doaj   +1 more source

Modeling of the Accumulated Nitrogen Loss by Volatilization in Topdressing Fertilization in Corn Plants. [PDF]

open access: yesPlant Environ Interact
ABSTRACT Corn cultivation is one of the most important in the world. Urea possesses a high concentration of nitrogen, which is very important to corn crops, is easily handled, and has a lower cost per kilogram of nitrogen, but it presents high losses of this nutrient through volatilization. Therefore, technologies are developed to minimize these losses,
Fernandes TJ   +4 more
europepmc   +2 more sources

Nonlinear equations to determine the growth curve of immunocastrated pigs [PDF]

open access: yesPesquisa Agropecuária Brasileira, 2020
: The objective of this work was to compare the performance of the nonlinear Gompertz, logistic, and von Bertalanffy equations, to describe the growth curve of immunocastrated male pigs from birth until reaching 140 kg body weight. Standard error, number
Marcos Speroni Ceron   +7 more
doaj   +2 more sources

What is the status of metabolic theory one century after Pütter invented the von Bertalanffy growth curve?

open access: yesBiological Reviews of The Cambridge Philosophical Society, 2020
Metabolic theory aims to tackle ecological and evolutionary problems by explicitly including physical principles of energy and mass exchange, thereby increasing generality and deductive power.
M. Kearney
semanticscholar   +1 more source

Analysis Von Bertalanffy equation with variation coefficient [PDF]

open access: yes, 2016
Growth is the increase of size, both its length and weight at a specific time period. In studying the behavior of the growth of fish used a growth model that is Von Bertalanffy models.
Pagalay, Usman
core   +4 more sources

Crecimiento del bagre dorado Brachyplatystoma rousseauxii en la región del Orinoco Medio en Venezuela, según la inferencia de modelos múltiples

open access: yesBiotecnología en el Sector Agropecuario y Agroindustrial, 2022
Tradicionalmente se ha utilizado el modelo de von Bertalanffy como patrón único en el estudio del crecimiento de los peces, considerándolo a priori como el único modelo que se ajusta a los datos de longitu-edad de las especies; una consideración que ...
Angel Rafael González
doaj   +1 more source

Parâmetros genéticos da taxa de maturação e do peso assintótico de fêmeas da raça Nelore Genetic parameters of maturation rate and asymptotic weight of Nelore females

open access: yesArquivo Brasileiro de Medicina Veterinária e Zootecnia, 2005
Utilizaram-se 14.563 pesagens de 1158 fêmeas da raça Nelore, nascidas entre 1984 e 1995, pertencentes a 10 fazendas, distribuídas em sete estados do Brasil.
A. Del V. Garnero   +4 more
doaj   +1 more source

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