Results 11 to 20 of about 73,652 (267)

On Compactness and Sequential Compactness [PDF]

open access: yesProceedings of the American Mathematical Society, 1976
Let X X be a compact space of cardinality less than or equal to
openaire   +2 more sources

The compactness and the concentration compactness via p-capacity [PDF]

open access: yesAnnali di Matematica Pura ed Applicata (1923 -), 2021
27 pages, Changes in the hypothesis of Theorem 1.4 and Theorem 1 ...
Anoop, T. V., Das, Ujjal
openaire   +2 more sources

GPS receivers for georeferencing of spatial variability of soil attributes Receptores GPS para georreferenciamento da variabilidade espacial de atributos do solo

open access: yesEngenharia Agrícola, 2011
The characterization of the spatial variability of soil attributes is essential to support agricultural practices in a sustainable manner. The use of geostatistics to characterize spatial variability of these attributes, such as soil resistance to ...
David L Rosalen   +4 more
doaj   +1 more source

On Countable Compactness and Sequential Compactness [PDF]

open access: yesProceedings of the American Mathematical Society, 1984
If a countably compact T 3 {T_3} space X X can be expressed as a union of less then c c many first countable subspaces, then MA implies that X X is sequentially compact.
openaire   +1 more source

Hastes instrumentadas para a mensuração da resistência mecânica do solo Instrumented shanks for soil mechanical resistance measurements

open access: yesEngenharia Agrícola, 2006
A presença de camada de solo compactada pode significar sérios problemas ao desenvolvimento do sistema radicular das culturas em geral. A correção pode ser feita por métodos biológicos ou mecânicos.
Viacheslav I. Adamchuk, José P. Molin
doaj   +1 more source

The effects of livestock grazing on soil water content in a wetland of Mongolia

open access: yesMongolian Journal of Biological Sciences, 2023
Wetlands are critical ecosystems for supporting biodiversity and regulating climate. Over the past century, it has been degraded significantly due to both climatic and human activities. In Mongolia, livestock grazing has drastic impact on this ecosystem.
Sumiya Vandandorj   +5 more
doaj   +1 more source

Avaliação da influência de cargas verticais sobre diferentes rodas compactadoras no ciclo de semeadura do milho Evaluation of the influence of vertical loads on different press whels in the cycle of sowing of the corn

open access: yesCiência e Agrotecnologia, 2007
Assim como outras culturas de origem tropical, o milho exige durante o seu ciclo vegetativo, calor e umidade para se desenvolver, e as condições de instalação da cultura podem definir uma boa ou má produção.
Jorge Wilson Cortez   +4 more
doaj   +1 more source

Compaction of granular columns under thermal cycling

open access: yesNational Science Open
Granular materials undergo compaction under periodic temperature fluctuations, leading to various engineering and geological phenomena from landslides to silo compaction.
Luo Yuxuan   +7 more
doaj   +1 more source

Advances in Powder Metallurgy Soft Magnetic Composite Materials

open access: yesArchives of Metallurgy and Materials, 2017
Powder metallurgy has grown with the expansion of various industry. Automotive industry had the most strong influence. Today, more than 90% of PM products are used in the transportation industry. Development of new materials such as magnetic materials is
Bureš R.   +4 more
doaj   +1 more source

A Low-Cost Self-Test Architecture Integrated With PRESENT Cipher Core

open access: yesIEEE Access, 2019
Cryptographic cores integrated with self-test ability fulfill both data security and reliability requirements of the Internet of Things (IoT) network. However, from the IoT perspective where most devices are resource constrained, a fundamental problem ...
Zeeshan Haider   +3 more
doaj   +1 more source

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