Results 21 to 30 of about 167,675 (289)

On Countable Compactness and Sequential Compactness [PDF]

Proceedings 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

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

Mongolian 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, Yamkhin Jambaljav, Gansukh Tsogt-Erdene, Ganbold Ulambayar, Jargalsaikhan Ochirkhuyag, Batbayar Nyambayar   +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

Ciência 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, Rouverson Pereira da Silva, Alberto Carvalho Filho, Carlos Eduardo Angeli Furlani, Saymon Severino Freitas   +4 more
doaj   +1 more source

Compaction of granular columns under thermal cycling

National Science Open
Granular materials undergo compaction under periodic temperature fluctuations, leading to various engineering and geological phenomena from landslides to silo compaction.
Luo Yuxuan, Lu Haiyang, Ai Xinyu, Liu Zelin, Yuan Houfei, Ge Zhuan, Zeng Zhikun, Wang Yujie   +7 more
doaj   +1 more source

Advances in Powder Metallurgy Soft Magnetic Composite Materials

Archives 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., Strečková M., Fáberová M., Kollár P., Füzer J.   +4 more
doaj   +1 more source

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

IEEE 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, Khalid Javeed, Mei Song, Xiaojun Wang   +3 more
doaj   +1 more source

Review of manufacturers'recommendations on technological capabilities of ejectable excavator vibroplates assessment during soil compaction

Вестник СибАДИ, 2020
Introduction. Add-on compactors for excavators (ACE hereinafter) are replaceable working equipment for excavators. They are used for soil compaction after the backfill of trenches, wells, foundation cavities and other “narrow spaces” of construction, as ...
I. S. Tiuremnov, D. V. Fedorova
doaj   +1 more source

SOIL ATTRIBUTES AND INITIAL CORN DEVELOPMENT AS A FUNCTION OF FERTILIZATION AND INTERCROPPING SYSTEMS [PDF]

Engenharia Agrícola
Fertilization systems that allow higher sowing speeds have been used in areas of grain production, as well as the use of intercropping to improve soil physical quality and provide better soil cover.
Jorge W. Cortez, Rouverson P. da Silva, Carlos E. A. Furlani, Nelci Olszevski, Hideo de J. Nagahama   +4 more
doaj   +2 more sources

Limestone Diagenetic Records Based on Petrographic Data of Sentolo Formation at Hargorejo Traverse, Kokap, Kulonprogo

Indonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v7i2.138Limestone diagenetic records of Sentolo Formation have been studied in order to trace the history of the geological processes after the deposition of the rocks.
Sigit Maryanto
doaj   +1 more source

Reducing deep soil compaction through strain modification under different wheel arrangements

, 2002
New mechanisation methods associated with increasing loads have the potential to cause undesirable deep compaction, which is difficult, expensive and in some cases impossible to alleviate.
Javadi, Arzhang
core   +3 more sources