Results 21 to 30 of about 103,539 (265)

Tribological Analysis of a Radial Plain Bearing [PDF]

Robotica & Management, 2022
The paper presents experimental determination of the friction coefficient variation at a radial plain bearing, depending on the values of the radial force R and the angular speed ω of the spindle at a constant lubricant temperature value.
Daniel-Gheorghe Vela, Ion Vela, Calin-Octavian Miclosina   +2 more
doaj   +1 more source

Decoding the radial velocity variations of HD 41248 with ESPRESSO [PDF]

Astronomy & Astrophysics, 2020
Context.Twenty-four years after the discoveries of the first exoplanets, the radial-velocity (RV) method is still one of the most productive techniques to detect and confirm exoplanets. But stellar magnetic activity can induce RV variations large enough to make it difficult to disentangle planet signals from the stellar noise. In this context, HD 41248
J. P. Faria, V. Adibekyan, E. M. Amazo-Gómez, S. C. C. Barros, J. D. Camacho, O. Demangeon, P. Figueira, A. Mortier, M. Oshagh, F. Pepe, N. C. Santos, J. Gomes da Silva, A. R. Costa Silva, S. G. Sousa, S. Ulmer-Moll, P. T. P. Viana   +15 more
openaire   +4 more sources

Long-period radial-velocity variations of Arcturus [PDF]

Publications of the Astronomical Society of the Pacific, 1989
We have measured the relative radial velocity of Arcturus using the HF absorption cell technique on 43 occasions from 1981 through 1985. The range of our velocities is 500 m s-1, which is much larger than our estimated internal errors (typically 10 m s-1).
Alan W. Irwin, Bruce Campbell, C.L. Morbey, G.A.H. Walker, S. Yang   +4 more
openaire   +1 more source

Radial gradient of the solar rotation rate in the near-surface shear layer of the Sun

Frontiers in Astronomy and Space Sciences, 2022
We study the radial gradient of the solar rotation rate in the near-surface shear layer (NSSL) from about .950 R⊙ to the solar surface and its variation during Solar Cycles 23 and 24 with ring-diagram analysis applied to Global Oscillation Network Group (
Rudolf Komm
doaj   +1 more source

The Variation of the Fractional Maximal Function of a Radial Function [PDF]

International Mathematics Research Notices, 2017
Abstract In this article, we study the regularity of the non-centered fractional maximal operator $M_{\beta}$. As the main result, we prove that there exists $C(n,\beta)$ such that if $q=n/(n-\beta)$ and $f$ is radial function, then $\|DM_{\beta}f\|_{L^{q}({\mathbb{R}^n})}\leq C(n,\beta)\|Df\|_{L^{1}({\mathbb{R}^n})}$.
Luiro, Hannes, Madrid, Jose
openaire   +4 more sources

Variação radial da retratibilidade e densidade básica da madeira de Eucalyptus saligna Sm. Radial variation of shrinkage and specific gravity in Eucalyptus saligna Sm. wood

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, José de Castro Silva   +1 more
doaj   +1 more source

Radial forearm free flap variation: A case report

Advances in Oral and Maxillofacial Surgery, 2022
Oral cavity malignancies comprise 6–8% of all malignancies. Tumour resection and reconstruction of the defect offers the best surgical outcome. Advances in microvascular surgery has allowed increased use of free flaps as part of surgical reconstruction ...
Janine Quek, Badrinarayanan Srinivasan, Mark Ansell, Craig J. Wales   +3 more
doaj   +1 more source

Effect of Radial Growth Rate on Wood Properties Variation of Sentang (Azadirachta excelsa) Tree Planted in Kelantan, Malaysia

BioResources, 2023
Properties of Sentang wood planted in Kelantan, Malaysia, were studied,  focusing on the effect of radial growth rate on variation in the fiber and vessel element dimensions, moisture content, density, shrinkage, bending, and compression strength at the ...
Mohamad Haaziq Ahmad, Mohd Hazim Mohamad Amini, Sharizal Ahmad Sobri, Hiroki Sakagami, Andi Hermawan   +4 more
doaj   +2 more sources

Correlações entre algumas propriedades físicas, características químicas e anatômicas da madeira de Luehea divaricata Mart. Malvaceae (Tiliaceae). Correlations among some physical properties, chemical and anatomical features in the wood of Luehea divaricata Mart. Malvaceae (Tiliaceae). [PDF]

Revista do Instituto Florestal, 2010
Objetivou-se caracterizar a densidade básica, retrações lineares e volumétrica e teores de extrativos, lignlina e holocelulose, no sentido medula-casca da madeira de Luehea divaricata, bem como investigar as correlações existentes entre as ...
Eduardo Luiz LONGUI, Israel Luiz de LIMA, Francides Gomes da SILVA JÚNIOR, Itiberê Moura Sckerratt SUCKOW, Sandra Monteiro Borges FLORSHEIM   +4 more
doaj  

Area of the Intersection between a Sphere and a Cylindrical Plane

Mathematical and Computational Applications, 2022
A proper understanding of the porous structure of packed beds of spheres is imperative in the analysis and design of the processes involving fluid flow and heat and mass transfer. The radial variation in porosity is of specific interest.
Charl Gabriël Du Toit
doaj   +1 more source