Results 291 to 300 of about 384,312 (331)

On Ball's History of Mathematics

The American Mathematical Monthly, 1902
(1902). On Ball's History of Mathematics. The American Mathematical Monthly: Vol. 9, No. 12, pp. 280-283.
openaire   +1 more source

A Mathematical Analysis of the Ball-Burnishing Process

CIRP Annals, 1983
Summary The ball-burnishing or ballizing process consists of forcing a slightly oversized ball through a ore-machined hole. This process yields good improvement in surface finish and roundness and at the same time the hole is sized up to within close tolerances of the ball.
A.Y.C. Nee, V.C. Venkatesh
openaire   +1 more source

Novel mathematical model to estimate ball impact force in soccer

Sports Biomechanics, 2017
To assess ball impact force during soccer kicking is important to quantify from both performance and chronic injury prevention perspectives. We aimed to verify the appropriateness of previous models used to estimate ball impact force and to propose an improved model to better capture the time history of ball impact force.
Takahito Iga, Hiroyuki Nunome, Shinya Sano, Nahoko Sato, Yasuo Ikegami   +4 more
openaire   +2 more sources

Mathematical models of open-circuit balling or granulating devices

Industrial & Engineering Chemistry Process Design and Development, 1981
Simplified mathematical models have been developed for the steady-state operations of single-pass continuous balling drums and disks. Random coalescence between agglomerates is considered to be the mechanism of pellet growth. Analytical expressions for the moments of the green pellet size distributions have been derived for continuous balling drums ...
Prakash C. Kapur, Kalanadh V. S. Sastry, Douglas W. Fuerstenau   +2 more
openaire   +1 more source

Mathematical Modeling of High Energy Ball Milling (HEBM) Process

Defect and Diffusion Forum, 2014
In the present study the modeling of the HEBM process is presented. The impact velocity, impact angle, rotation speed, mass of balls, ball-to-powder weight ratio and time of milling have been taken into account in order to calculate the energy transferred from the balls to the powder.
Maya Radune, A. Radune, Svetlana Lugovskoy, M. Zinigrad, David Fuks, N. Frage   +5 more
openaire   +1 more source

Mathematical Model of Double Row Self-Aligning Ball Bearing

Ball bearings are widely used in variety of rotary mechanisms expecting their maintenance-free operation. One of the main factors influencing bearing life is radial internal clearance (RIC), which can be simply described as relative movement of ball and raceway perpendicular to the bearing axis.
Bartłomiej Ambrożkiewicz, Grzegorz Litak, Anthimos Georgiadis, Arkadiusz Syta, Nicolas Meier, Alexander Gassner   +5 more
openaire   +3 more sources

A mathematical model for simulating and manufacturing ball end mill

Computer-Aided Design, 2014
The performance of ball end mill cutters in cutting operations is influenced by the configuration of the rake and clearance faces in the ball component. From the mathematical design of a cutting edge curve, the rake face can be defined by the rake angle and the width of the rake face at each cross section along the cutting edge.
Hien Nguyen, Sung-Lim Ko
openaire   +1 more source

W.W. Rouse Ball’s Mathematical Approach to String Figures

2014
The Cambridge mathematician Walter William Rouse Ball (1850–1925) devoted a chapter to “String Figures” in his popular book Mathematical Recreations and Essays. This may be the first ever attempt by a mathematician to demonstrate the connection between mathematics and procedural activities such as string figure-making. The epistemological stake of such
openaire   +1 more source

A mathematical model for freezing of calcium alginate gel balls

Journal of Food Engineering, 1994
Abstract A heat transfer model is proposed to describe the freezing process of alginate gel balls in a deep freezer. The freezing process consists of three separate stages with each stage being represented by a separate heat transfer equation. The model is much easier to use than solving a more complicated problem with a moving freezing front ...
openaire   +1 more source

Mathematical modelling analysis of deep groove ball bearing with misalignment

Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics
Deep groove ball bearing is prone to misalignment due to installation and long-term use, which requires research on the frequency characteristics and evolution mechanism excited by misalignment. This article first outlines a mathematical model of a rotor supported at both ends, which is used to describe the multi-body vibration mechanism of bearing ...
Xing Yuan, Hui Liu, Huijie Zhang
openaire   +1 more source