Results 51 to 60 of about 1,693,905 (179)

A REVERSE ENGINEERING APPROACH TO OBTAIN THE 3D MODEL OF A SPARE PART

open access: yesNonconventional Technologies Review, 2018
The current stage is characterized by the steady growth of competition between manufacturing companies, which causes diversifying the range of products and find new methods to shorten the time for the development of a new product.
Iulian Stanasel, Traian Buidos
doaj  

Skyrme–Faddeev Instantons on Complex Surfaces [PDF]

open access: yesCommunications in Mathematical Physics, 2014
The authors study a conformally invariant \(\sigma_2\)-variational problem for a map \(\varphi:(M^4,g)\to (N,h)\). The map \(\varphi\) is an instanton solution for the strongly coupled Skyrme and Faddeev models if it is a stable smooth critical point of the \(\sigma_2\) (finite) energy \(\mathcal{E}_{\sigma_2}(\varphi)= \int_M|\wedge^2d\varphi|^2v_g\).
Slobodeanu, R., Svensson, M.
openaire   +3 more sources

HIGH AND LOW RESOLUTION TEXTURED MODELS OF COMPLEX ARCHITECTURAL SURFACES [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
During the recent years it has become obvious that 3D technology, applied mainly with the use of terrestrial laser scanners (TLS) is the most suitable technique for the complete geometric documentation of complex objects, whether they are monuments or ...
E. K. Stathopoulou   +3 more
doaj   +1 more source

Comparison of WBGTs over Different Surfaces within an Athletic Complex

open access: yesMedicina, 2020
Many athletic governing bodies are adopting on-site measurement of the wet-bulb globe temperature (WBGT) as part of their heat safety policies. It is well known, however, that microclimatic conditions can vary over different surface types and a question ...
Andrew Grundstein, Earl Cooper
doaj   +1 more source

Zoll Manifolds and Complex Surfaces

open access: yesJournal of Differential Geometry, 2002
We classify compact surfaces with torsion-free affine connections for which every geodesic is a simple closed curve. In the process, we obtain completely new proofs of all the major results concerning the Riemannian case. In contrast to previous work, our approach is twistor-theoretic, and depends fundamentally on the fact that, up to biholomorphism ...
Lebrun, Claude, Mason, L.J.
openaire   +5 more sources

Almost complex surfaces in the nearly Kaehler S6

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
It is shown that a compact almost complex surface in S6 is either totally geodesic or the minimum of its Gaussian curvature is less than or equal to 1/3.
Sharief Deshmukh
doaj   +1 more source

Complex structures on Riemann surfaces [PDF]

open access: yesTransactions of the American Mathematical Society, 1972
Let X X be a Riemann surface (compact or noncompact) with the property that the length of every closed geodesic is bounded away from zero. Then we show that sufficiently small complex structures on X X can be described without making use of Schwarzian derivatives or the theory of quasiconformal mappings.
openaire   +1 more source

Biharmonic and Quasi-Biharmonic Slant Surfaces in Lorentzian Complex Space Forms

open access: yesAbstract and Applied Analysis, 2013
In 1991, Chen and Ishikawa initially studied biharmonic marginally trapped surfaces in neutral pseudo-Euclidean 4-space. Recently, biharmonic and quasi-biharmonic marginally trapped Lagrangian surfaces in Lorentzian complex space forms were studied by ...
Yu Fu
doaj   +1 more source

On the supersingular reduction of K3 surfaces with complex multiplication [PDF]

open access: yes, 2017
We study the good reduction modulo p of K3 surfaces with complex multiplication. If a K3 surface with complex multiplication has good reduction, we calculate the Picard number and the height of the formal Brauer group of the reduction.
Ito, Kazuhiro
core   +1 more source

Casa para el poema del ángulo recto, Vilches, Chile

open access: yesARQ, 2012
Superficies complejas construidas -y revestidas- con tablas, una losa abombada y tres conos truncados dan forma a un interior recogido y a un volumen en sombras.A domed slab, complex surfaces -cast and lined with planks- and three truncated cones shape a
Smiljan Radic
doaj  

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