Results 81 to 90 of about 12,776,695 (181)

A new expression for umbral operators and power series inversion

, 1977
It is shown here the compositional inversion of formal power series has a natural formulation in terms of umbral operators. This fact is used to derive a new proof of the Lagrange inversion theorem by operator theoretic methods.
S. A. Joni, A. M. Garsia
core   +1 more source

Cuantificación del umbral gustativo del adulto mayor y su comparación con el joven Quantification of the gustative threshold of the older adult and its comparison with the young individual

Revista Cubana de Investigaciones Biomédicas, 2008
INTRODUCCIÓN: Comprender los cambios fisiológicos que se presentan durante el envejecimiento contribuye a que el personal de enfermería mejore la calidad del servicio que proporciona a esta población.
Raymundo Velasco-Rodríguez, Mario Del Toro-Equihua, Ana Bertha Mora-Brambila, Bertha Alicia Olmedo Buen-rostro, Matilde Delgado de la Cruz, Ada Carina Cobián-Castellanos   +5 more
doaj  

The magnetic origin of the outer boundaries of sunspots

Astronomy & Astrophysics
Context. Sunspot boundaries are commonly outlined by contours of the continuum intensity. However, their magnetic nature has not yet been fully characterised. Aims.
Schmassmann Markus, Bello González Nazaret, Jurčák Jan, Schlichenmaier Rolf   +3 more
doaj   +1 more source

Higher-order Umbral Differential Problems for ODEs: Theoretical foundations and computational methods

AIMS Mathematics
In this paper, we consider the higher-order Umbral Differential Problem (UDP). It consists of a nonlinear ordinary differential equation of order r + 1, r > 0, associated with an Umbral Interpolation Problem (UIP) with r + 1 conditions. We prove the existence and uniqueness of the solution to the UIP and study the error using Peano’s Kernel.
Costabile F. A., Gualtieri M. I., Napoli A.   +2 more
openaire   +2 more sources

Umbral de rentabilidad

, 2018
En este video se muestra el concepto de umbral de rentabilidad, su expresión matemática y su interpretación gráficahttps://media.upv.es/player/?id=0a3da530-6c91-11e8-bc03-6b9390fe7cf9Díaz-Madroñero Boluda, FM. (2018). Umbral de rentabilidad.
Díaz-Madroñero Boluda, Francisco Manuel
core  

Precisão da medida do limiar anaeróbio por meio do calorímetro portátil Precisión de la medición del umbral anaerobio por medio del calorímetro portátil Measurement precision of the anaerobic threshold by means of a portable calorimeter

Arquivos Brasileiros de Cardiologia, 2010
FUNDAMENTO: Muitos métodos são empregados para determinar o Limiar Anaeróbio (LAn) por meio de ergoespirômetros sofisticados. OBJETIVO: Testar a variação no LAn, detectado por modelos matemáticos e de inspeção visual, quando empregado ergoespirômetro de ...
Fernando dos Santos Nogueira, Fernando Augusto Monteiro Sabóia Pompeu   +1 more
doaj  

Observations of umbral flashes in the resonant sunspot chromosphere [PDF]

Context. In sunspot umbrae, the core of some chromospheric lines exhibits periodic brightness enhancements known as umbral flashes. The consensus is that they are produced by the upward propagation of shock waves.
T. Felipe, E. Khomenko, C. Quintero Noda, D. Martínez-Gómez, H. Socas-Navarro, S. J. González Manrique, M. M. Gómez-Míguez, Noda, C. Quintero, Manrique, S. J. González, Martínez-Gómez, D., Gómez-Míguez, M. M., Felipe, T., Socas-Navarro, H., Khomenko, E.   +13 more
core   +1 more source

Sunspot simulations with MURaM

Astronomy & Astrophysics
Context. Existing sunspot simulations fail to reproduce the observed magnetic field distribution due to an artificially increased Bhor at the upper boundary. Aims.
Schmassmann Markus, Bello González Nazaret, Schlichenmaier Rolf, Jurčák Jan   +3 more
doaj   +1 more source

The Umbral Transfer-Matrix Method: V. The Goulden-Jackson Cluster Method for Infinitely Many Mistakes

, 2002
This is the fifth, and last, installment of the saga on the Umbral Transfer-Matrix method, based on Gian-Carlo Rota’s seminal notion of the umbra. Here we extend the powerful GouldenJackson Cluster method, that enables one to compute generating functions enumerating words that avoid, as factors, any given finite set of “mistakes”, to the case where ...
openaire   +3 more sources

El viajero en el umbral

, 2007
Si el viajero está en el umbral no es porque dude del siguiente paso, sino porque el umbral, como la luna, acompaña al viajero en cada pisada. O por lo menos así me lo parece. Y es en ese “parecer” donde radica la dificultad de reseñar una obra literaria,
Mejía, César, Mejía, César A.
core   +2 more sources