Results 51 to 60 of about 34,040 (161)
V. On the Revolutions of the Earth's Surface [PDF]
Transactions of the Royal Society of EdinburghIf such tremendous agents did in reality exert their influence in the Alps, it is not conceivable that other countries, situated lower, and composed of materials much more frail, could have been spared. We hear in fact of similar traces, more or less distinct, in all quarters of the globe.
openaire +4 more sources
The Spectrum and Isometric Embeddings of Surfaces of Revolution [PDF]
Canadian Mathematical Bulletin, 2006 AbstractA sharp upper bound on the first S1 invariant eigenvalue of the Laplacian for S1 invariant metrics on S2 is used to find obstructions to the existence of S1 equivariant isometric embeddings of such metrics in (ℝ3, can). As a corollary we prove: If the first four distinct eigenvalues have even multiplicities then the metric cannot be ...
openaire +2 more sources
Journal of Manufacturing and Materials ProcessingRobotic grinding serves as a pivotal embodiment and key technological support of Industry 4.0. Elucidating the influence of robotic grinding parameters on the material removal depth (MRD) of 42CrMo steel and optimizing these parameters are critical to ...
Dequan Shi +3 more
doaj +1 more source
Singular surfaces of revolution with prescribed unbounded mean curvature
Anais da Academia Brasileira de Ciências: We give an explicit formula for singular surfaces of revolution with prescribed unbounded mean curvature. Using this mean curvature, we give conditions for certain types of singularities of those surfaces. Periodicity of that surface is also discussed.
MARTINS LUCIANA F. +3 more
doaj +1 more source
Surfaces of revolution with moving axes and angles
Graphical Models, 2019 Abstract A surface of revolution with moving axes and angles is a rational tensor product surface generated from two rational space curves by rotating one curve (the directrix) around vectors and angles generated by the other curve (the director).
Haohao Wang, Ron Goldman 0002
openaire +1 more source
THREE DIMENSIONAL SURFACES OBTAINED BY THE EQUIFORM MOTION OF A SURFACE OF REVOLUTION [PDF]
Assiut University Journal of Multidisciplinary Scientific Research, 2015 In this paper, a three dimensional surface using equiform motion of a surface of revolutionin Euclidean 3-space E3is generated. The main results obtained in this paper are that thesurface foliated by equiform motion of sphere has a zero scaler curvature ...
doaj +1 more source
Analysis and Geometry in Metric Spaces, 2016 We give an example of a smooth surface of revolution for which all circles about the origin are strictly stable for fixed area but small isoperimetric regions are nearly round discs away from the origin.
Morgan Frank
doaj +1 more source
APPROXIMATE DEVELOPMENTS FOR SURFACES OF REVOLUTION [PDF]
Fiabilitate şi Durabilitate, 2016 The purpose of this paper is provide a set of Maple procedures to construct approximate developments of a general surface of revolution generalizing the well-known gore method for ...
Mădălina Roxana Buneci
doaj
On renewal of surfaces of revolution by linear surfaces
Researches in Mathematics, 1998 We solve the problem of asymptotically optimal renewal of surfaces of revolution with smooth generating linear surfaces. We obtain the algorithm of finding the parameters of the set of asymptotically optimal surfaces.
openaire +2 more sources
Pengaruh Perubahan Kecepatan Pemakanan Terhadap Kekasaran Permukaan Pada Proses Pembubutan
Semesta Teknika, 2016 This research done to know existence of transformation influence of feeding speed at turning process to surface roughness of work substance. Specimen material is ST 37 with Ø 30, 40, 50 and 70 mm, with transformation of feeding speed 0,05, 0,069, 0,088,
Hadimi Hadimi
doaj