Results 21 to 30 of about 43,859,565 (143)

Influence on the physical-mechanical properties of portland-cement mortar, have admixtures of colophony and tannin

open access: yesMateriales de Construccion, 1989
The colophony has been used as an admixture in the Portland cement mortar with the intention to observe its influence on the air content, water absorption, adhesive capacity and mechanical properties.
M. Fernández Cánovas   +2 more
doaj   +1 more source

Aproximación a la gestión económica integral de las obras por procesos productivos: elaboración del modelo COP de control de costes de construcción

open access: yesInformes de la Construccion, 2017
La profunda crisis económica sufrida recientemente en España ha puesto de manifiesto la vulnerabilidad del Sector de la Construcción y la necesidad de desarrollar nuevas herramientas que incrementen su eficacia.
M. V. Montes   +3 more
doaj   +1 more source

Geologic atlas of the United States : topography, areal geology, economic geology, structure sections / 142 Cloud Peak - Fort McKinney Folio : Wyoming

open access: yes, 1906
E. M. Douglas ; T. M. Bannon ; H. S. Wallace ; F. E. MatthesList of Sheets: Topography, Areal Geology, Economic Geology, Structure-SectionIndirektes handschriftliches Exlibris: "1908, 214", das ist United States Geological Survey Washington Exemplar der ...
Douglas, E. M.
core   +1 more source

Predimensionado óptimo de secciones mixtas de hormigón y acero: criterios del Eurocódigo 4

open access: yesInformes de la Construccion, 2001
El cálculo de vigas mixtas de hormigón y acero se realiza a partir de un predimensionado de la sección que se ajusta por un proceso iterativo hasta alcanzar una aproximación razonable; la definición inicial de la sección es compleja por las numerosas ...
José Monfort Lleonart   +2 more
doaj   +1 more source

Evaluación de tierras para reforestación (Horche, Guadalajara) mediante un índice de Productividad Agraria

open access: yesEstudios Geográficos, 2002
[es] La Unión Europea está promoviendo la reforestación en aquellos países, como España, con áreas vulnerables a la degradación y a la desertificación. El propósito de este artículo es delimitar y definir, mediante un método de Evaluación de Tierras, las
C. Hontoria Fernández   +2 more
doaj   +1 more source

Logical–Mathematical Foundations of a Graph Query Framework for Relational Learning

open access: yesMathematics, 2023
Relational learning has attracted much attention from the machine learning community in recent years, and many real-world applications have been successfully formulated as relational learning problems.
Pedro Almagro-Blanco   +2 more
doaj   +1 more source

The tolerant immune system: Biological significance and clinical implications of T cell tolerance

open access: yes, 2019
Background: T cell tolerance both at thymic and peripheral levels is a mechanism of protection finalized to eradicate autoreactive T cell clones and/or to maintain immune homeostasis, especially, postnatally.
Jirillo E., Magrone T.
core   +1 more source

Internazionalizzazione, performance delle imprese e crisi economiche: i produttori di piastrelle di ceramica del distretto di Modena e Reggio Emilia

open access: yes, 2013
Le crisi economiche rappresentano un evento che incide negativamente sulla redditività delle imprese. Nonostante gli studi di management abbiano offerto una serie di argomentazioni teoriche ed evidenze empiriche su come le crisi economiche influenzano ...
Spadafora E.   +3 more
core   +1 more source

A long-acting octreotide analog formed by conjugation with a peptide linker modified with two fatty acids

open access: yesFrontiers in Endocrinology
IntroductionCurrent long-acting somatostatin analogs control acromegaly and neuroendocrine tumor symptoms, but rely on depot formulations requiring large-bore needle administration, often associated with injection-site pain, nodules, and variable drug ...
Yueh-Hsiang Yu   +12 more
doaj   +1 more source

Identification of microRNAs and their targets associated with fruit-bagging and subsequent sunlight re-exposure in the ‘Granny Smith’ apple exocarp using high-throughput sequencing

open access: yesFrontiers in Plant Science, 2016
Bagged fruits of green apple cultivar ‘Granny Smith’ have been found to turn cardinal red after debagging during fruit-ripening in the Loess Plateau region of China.
Dong eQu   +15 more
doaj   +1 more source

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