Axial complex of Crinoidea: Comparison with other Ambulacraria

2020 ◽  
Vol 281 (11) ◽  
pp. 1456-1475
Author(s):  
Olga Vladimirovna Ezhova ◽  
Vladimir Vasil'yevich Malakhov
Keyword(s):  
Axial Complex

Analytical Limit Load Procedure for The Axial Complex Shaped Defect in a Pressurized Pipe

2021 ◽  
Author(s):  
Igor Orynyak ◽  
Julia Bai ◽  
Roman Mazuryk
Keyword(s):  
General Procedure ◽  
Limit Load ◽  
Admissible Solution ◽  
Experimental Comparison ◽  
Physical Parameters ◽  
Equilibrium Equations ◽  
Axial Complex ◽  
The Difference ◽  
Full Scale Tests ◽  
Distribution Of Stress

Abstract The paper is devoted to elaboration of the analytical O-procedure for limit load analysis of complex shaped axial defect in a pressurized pipe. It is based on the classical lower bound theorem of the theory of plasticity, and consists in construction of the statically admissible solution, where distribution of stress satisfies to the equilibrium equations and strength conditions. O-procedure is an optimization process to get the most favorable stress distribution for providing the maximal pressure. It allows to explicitly account for the variable geometrical and physical parameters. Contrary to other approaches, the derived formula for rectangular defect is only a particular case of the general procedure application. Four different methods for the complex defects are compared. They are: first, ASME, A-, rectangular defect formula combined with RSTRENG, R-, procedure, i.e., A-R approach; second, PCORRC, P-, formula with R-procedure, P-R approach; third, Orynyak's, O-, formula with R-procedure, O-R approach; and fourth, our universal O-procedure. The verification begins for rectangular defects where both theoretical and experimental comparison is performed for A-, P-, and O- formulas. The difference between them is small, provided that all three employ the same characteristic of material, here the ultimate strength. Then theoretical comparison for A-R, P-R, O-R approaches and O-procedure is performed for the artificial complex defects, for two symmetrical rectangular defects, for triangular defect. Experimental comparison between four methods is made based on the well-known University of Waterloo full scale tests.

TRANSORAL GUNSHOT WOUNDS TO THE ATLANTO-AXIAL COMPLEX

1994 ◽  
Vol 37 (5) ◽  
pp. 858-861 ◽  
Author(s):  
Allen H. Maniker ◽  
Mitchell R. Gropper ◽  
David Hunt
Keyword(s):  
Gunshot Wounds ◽  
Axial Complex

Axial complex and associated structures of the sea urchin Strongylocentrotus pallidus (Sars, G.O. 1871) (Echinodermata: Echinoidea)

2018 ◽  
Vol 279 (6) ◽  
pp. 792-808 ◽  
Author(s):  
Olga Vladimirovna Ezhova ◽  
Vladimir Vasil'yevich Malakhov ◽  
Ekaterina Alekseevna Egorova
Keyword(s):  
Sea Urchin ◽  
Axial Complex

Transformations of the axial complex of ophiuroids as a result of shifting of the madreporite to the oral side

2016 ◽  
Vol 43 (6) ◽  
pp. 494-502 ◽  
Author(s):  
O. V. Ezhova ◽  
E. A. Egorova ◽  
V. V. Malakhov
Keyword(s):  
Axial Complex ◽  
Oral Side

scholarly journals Embryogenesis of an Invertebrate Lymphoid Organ: The Asterina Gibbosa Axial Organ (Asterids, Echinodermata)

2020 ◽  
pp. 1-2
Keyword(s):  
Ventral Side ◽  
Sensu Stricto ◽  
Lymphoid Organ ◽  
Axial Complex ◽  
Axial Organ ◽  
Stone Canal

The metamerization of the coelom leads to the axial complex genesis. Mesodermic cells appear besides the stone canal (larva 12 days old): they constitute the axial organ (AO) which develop, in the ventral side, the oral part (PO). This last part corresponds (sensu stricto) to the ancestral lymphoïd organ.

The synthesis and synergistic catalysis of iron phthalocyanine and its graphene-based axial complex for enhanced oxygen reduction

Nano Energy ◽  
2018 ◽  
Vol 46 ◽  
pp. 347-355 ◽  
Author(s):  
Jia Guo ◽  
Xiaomei Yan ◽  
Qin Liu ◽  
Qiang Li ◽  
Xiao Xu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Iron Phthalocyanine ◽  
Axial Complex ◽  
Synergistic Catalysis

scholarly journals Optical properties of electron-irradiated GaN

1998 ◽  
Vol 3 ◽  
Author(s):  
I. A. Buyanova ◽  
Mt. Wagner ◽  
W. M. Chen ◽  
L. Lindström ◽  
B. Monemar ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Electron Irradiation ◽  
Principal Axis ◽  
Host Lattice ◽  
Temperature Dependent ◽  
Crossing Experiments ◽  
Axial Complex ◽  
Internal Transition ◽  
Optically Detected

The electronic structure of defects produced by 2.5-MeV electron irradiation and their effect on optical properties of GaN are investigated using photoluminescence (PL) and optically detected magnetic resonance (ODMR) techniques. The electron irradiation is shown to produce, in particular, a deep PL band with a no-phonon line at around 0.88 eV followed by a phonon-assisted sideband. We suggest that this emission is caused by an internal transition between excited and ground state of a deep defect. The excited state is a multiple-level state, as revealed from temperature dependent PL and level anti-crossing experiments. The electronic structure of the 0.88 eV defect is shown to be sensitive to the internal strain in the GaN epilayers. The ODMR studies reveal that the principal axis of the defect coincides with the c-axis of the host lattice and should therefore be either an on-site point defect or an axial complex defect along the c-axis.

Microscopic anatomy of the axial complex in the starfish Asterias rubens (Echinodermata, Asteroidea)

2013 ◽  
Vol 40 (8) ◽  
pp. 643-653 ◽  
Author(s):  
O. V. Ezhova ◽  
E. A. Lavrova ◽  
V. V. Malakhov
Keyword(s):  
Asterias Rubens ◽  
Microscopic Anatomy ◽  
Axial Complex
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