Results 41 to 50 of about 425,585 (327)
The Journal of Engineering, 2019 To realise wide-band stealth of radar absorbing material, a special-shaped honeycomb radar absorbing structure within nested cone-shaped scattering configuration is designed.
Wang Ming-liang +9 more
doaj +1 more source
Abstract Orientable Incidence Structure and Algorithms for Finite Bounded Acyclic Categories. I. Incidence Structure [PDF]
arXiv, 2023 A generalization of incidence relations in abstract polytope has been explored, and parameterized surfaces are used as primers. The abstract orientable incidence structure is defined as an algebraic model of incidence relations, in which some algebraic properties in abtract polytope theory are generalized.
arxiv
Double Sided Band-pass Frequency Selective Surface Based on Matryoshka Geometry [PDF]
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsThis paper describes the development of a double-sided band-pass frequency selective surface based on Matryoshka geometry, preserving features such as miniaturization, multiband operation and stability of polarization and angle of incidence.
Marina de O. Alencar +3 more
doaj +1 more source
Fabrication of Multilayer Cu/Ni Systems with Nanometric Layers by Electrolysis Method [PDF]
Archives of Metallurgy and Materials, 2018 The paper presents research results of multilayer systems composed of alternate Cu/Ni layers. The layers thickness obtained by the galvanic treatment was determined by using the transmission electron microscopy and X-ray diffraction method in the grazing
M. Spilka +4 more
doaj +1 more source
FEMORAL NECK FRACTURES – BIOLOGICAL ASPECTS AND RISK FACTORS. [PDF]
Journal of IMAB, 2014 The strength of the bone is a function of its mechanical properties and bone geometry. The probability of the occurrence of femoral neck fracture is associated with both the trauma mechanism and magnitude of the acting forces as well as with the bone ...
Orlin Filipov
doaj +1 more source
OPTIMIZING TERRESTRIAL LASER SCANNING MEASUREMENT SET-UP [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012 One of the main applications of the terrestrial laser scanner is the visualization, modeling and monitoring of man-made structures like buildings. Especially surveying applications require on one hand a quickly obtainable, high resolution point cloud but
S. Soudarissanane, R. Lindenbergh
doaj +1 more source
Ag on Ge(111): 2D X-ray structure analysis of the (Wurzel)3 x (Wurzel)3 superstructure [PDF]
, 1992 We have studied the Ag/Ge(111)(Wurzel)3 x (Wurzel)3 superstructure by grazing-incidence X-ray diffraction. In our structural analysis we find striking similarities to the geometry of Au on Si(111). The Ag atoms form trimer clusters with an Ag-Ag distance
Bertucci +21 more
core +2 more sources
Incidences between points and lines in three dimensions [PDF]
, 2015 We give a fairly elementary and simple proof that shows that the number of incidences between $m$ points and $n$ lines in ${\mathbb R}^3$, so that no plane contains more than $s$ lines, is $$ O\left(m^{1/2}n^{3/4}+ m^{2/3}n^{1/3}s^{1/3} + m + n\right) $$
Sharir, Micha, Solomon, Noam
core +3 more sources
Crystals, 2019 The in-plane magnetic structure of a layered system composed of polycrystalline grains smaller than the ferromagnetic exchange length was studied to elucidate the mechanism controlling the magnetic properties considerably different from the bulk using ...
Ryuji Maruyama +5 more
doaj +1 more source
Two cryptomorphic formalizations of projective incidence geometry [PDF]
Annals of Mathematics and Artificial Intelligence, 2018 Incidence geometry is a well-established theory which captures the very basic properties of all geometries in terms of points belonging to lines, planes, etc. Moreover, projective incidence geometry leads to a simple framework where many properties can be studied. In this article, we consider two very different but complementary mathematical approaches
Braun, David +2 more
openaire +4 more sources