Results 41 to 50 of about 2,693,298 (187)
Efeito da procedência em algumas propriedades da madeira de Gallesia integrifolia (Spreng.) Harms. Effect of provenance in some wood properties of Gallesia integrifolia (Spreng.) Harms. [PDF]
Revista do Instituto Florestal, 2010 A utilização de teste de procedência pode fornecer informações sobreo comportamento silvicultural de populações de uma determinada espécie, também permite a estimativa de parâmetros genéticos de características de interesse econômico, seleção de material
Antonio Carlos Scatena ZANATTO +6 more
doaj
Universal basic mass density inside dark matter halos
Physica ScriptaAbstract In this work we propose a universal basic mass density and a universal basic metric inside dark matter halos in the framework of Einstein equations providing an analytical ground for learning about dark matter. In a previous work the authors have proposed a simplified model for galaxies: a Schwarzschild black hole (that contains
Nidal Haddad, Fateen Haddad
openaire +2 more sources
Evolution of density perturbations in a realistic universe
, 2005 Prompted by the recent more precise determination of the basic cosmological parameters and growing evidence that the matter-energy content of the universe is now dominated by dark energy and dark matter we present the general solution of the equation ...
A. Friedman +27 more
core +1 more source
Neuro-fuzzy Hybrid System for Monitoring Wood Moisture Content During Drying
Floresta e Ambiente, 2019 The heterogeneous behavior of wood during drying is a process difficult to control. The objective of this study was to evaluate the accuracy of the neuro-fuzzy hybrid system for monitoring wood moisture during drying.
Antônio José Vinha Zanuncio +4 more
doaj +1 more source
Unconditional basic sequences in spaces of large density
Advances in Mathematics, 2011 We study the problem of the existence of unconditional basic sequences in Banach spaces of high density. We show, in particular, the relative consistency with GCH of the statement that every Banach space of density $\aleph_ $ contains an unconditional basic sequence.
Dodos, P. +2 more
openaire +4 more sources
Granular two-phase insulation systems [PDF]
, 1971 Easily prepared system, consisting of matrix of hollow zirconia microspheres containing dispersed tungsten powder, produces minimum-cost, prototype test specimen.
Carpenter, H. W.
core +1 more source
Maderas: Ciencia y Tecnología, 2014 El objetivo del trabajo fue evaluar tensiones de crecimiento en Eucalyptus dunnii y determinar el efecto de las propiedades físicas de la madera sobre esta variable. Se muestrearon 45 árboles de un ensayo de 19 años situado en la provincia de Corrientes,
Mariano Hernández +2 more
doaj
Maderas: Ciencia y Tecnología, 2014 El raleo tiene implicancias económicas y técnicas tanto para producción forestal como para la actividad industrial. En el presente estudio se realizó la evaluación de un ensayo de intensidad de raleo en E.
Sandro Díaz Bravo +4 more
doaj
Revista Árvore, 2003 A ultra-estrutura e a composição química da madeira, bem como suas propriedades físicas e mecânicas, variam significativamente entre espécies, entre árvores de uma mesma espécie e, mesmo, entre diferentes partes de uma mesma árvore.
José Tarcísio da Silva Oliveira +1 more
doaj +1 more source
Variation of Physical Properties of Eucalyptus globulus Grown in Ethiopia
Indonesian Journal of Innovation and Applied SciencesThis study investigated the variability of density, shrinkage, and sap-heartwood proportion in different sites and within a tree. 10 trees of E. globulus from Menagesha Suba (M/Suba) and Debre Birhan (D/Birhan) forests were felled and 12 disks from each ...
Samson Waktole +6 more
doaj +1 more source