Results 81 to 90 of about 586,382 (179)

Velocity and velocity bounds in static spherically symmetric metrics

open access: yes, 2010
We find simple expressions for velocity of massless particles in dependence of the distance $r$ in Schwarzschild coordinates. For massive particles these expressions put an upper bound for the velocity.
Arraut, I., Batic, D., Nowakowski, M.
core   +1 more source

A virtual measurement method for evaluating the gear radial composite deviation based on point cloud data

open access: yesResults in Engineering
Radial composite deviation is an important index to evaluate the precision of gear transmission, and its detection method is also an important trend of gear detection in industrial development.
Yazhou Wang   +4 more
doaj   +1 more source

Subsurface magnetic fields from helioseismology [PDF]

open access: yes, 2002
Using even-order frequency splitting coefficients of global p-modes it is possible to infer the magnetic field in the solar interior as a function of radial distance and latitude. Results obtained using GONG and MDI data are discussed.
Antia, H. M.
core   +2 more sources

A variation of the brachial plexus and Radial nerve: A case report

open access: yesMajallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul, 2004
Background and Objective: Some of the brachial plexus and radial nerve variations have been reported. In many cases, variations could be important in clinical aspect.
M Pour Ghasem   +2 more
doaj  

Study on the Time-Varying Stiffness Characteristics of Four-Point Contact Ball Bearings

open access: yesLubricants
This paper takes a four-point contact ball bearing of a wind turbine as the research object, analyzes the force and deformation relationship under the combined action of axial load and radial load, obtains the load distribution of rolling elements, and ...
Runlin Chen   +5 more
doaj   +1 more source

High Origin of Radial Arteries: A Report of Two Rare Cases

open access: yesThe Scientific World Journal, 2010
Variations in the arterial supply of the upper limb are relatively common, with reported prevalence rates ranging from 11 to 24.4%. Of these, the most commonly encountered variation in the arm is a high origin of the radial artery.
Dong Zhan   +4 more
doaj   +1 more source

PlanetPack software tool for exoplanets detection: coming new features

open access: yes, 2014
We briefly overview the new features of PlanetPack2, the forthcoming update of PlanetPack, which is a software tool for exoplanets detection and characterization from Doppler radial velocity data. Among other things, this major update brings parallelized
Baluev, Roman V.
core   +1 more source

The Effects of Agroforestry Practices on Physical Propertiesin of Poplus Wood in Radial and Longitudinal Axes [PDF]

open access: yesIranian Journal of Wood and Paper Industries, 2012
The effects of intercropping with alfalfa as well as initial tree spacing on physical variations of Populus nigra betulifolia wood in radial and longitudinal axes are reported.
Davood Afhami.CC   +4 more
doaj  

Report of a Rare Variation of the Radial Artery [PDF]

open access: yesJournal of Cardiovascular and Thoracic Research, 2011
Radial artery is used for microsurgery as well as coronary artery grafting. Operators and cardiologists may encounter by anomalies of this artery during surgery. Hence, it is important to identify these anomalies.
Shabnam Mohammadi, Soheyla Jafarpour
doaj  

Prediction of high speed propeller flow fields using a three-dimensional Euler analysis [PDF]

open access: yes
To overcome the limitations of classical propeller theory, a computer program, NASPROP-E, was developed which solves for the flow field surrounding a multibladed propeller and axisymmetric nacelle combination using a finite difference method.
Bober, L. J.   +2 more
core   +1 more source

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