The effect of a dipolar structure on the Hölder stability in Green–Naghdi thermoelasticity

2017 ◽  
Vol 29 (6) ◽  
pp. 1365-1374 ◽  
Author(s):  
Marin Marin ◽  
Andreas Öchsner
Keyword(s):  
Dipolar Structure ◽  
Hölder Stability

Reaction of arylmethylenemalonaldehydes with some nucleophiles

1987 ◽  
Vol 52 (11) ◽  
pp. 2699-2709 ◽  
Author(s):  
Dalimil Dvořák ◽  
Zdeněk Arnold
Keyword(s):  
Inorganic Anions ◽  
Secondary Amines ◽  
Tertiary Amines ◽  
Primary And Secondary Amines ◽  
Dipolar Structure

Reaction of arylmethylenemalonaldehydes with tributylphosphine and tertiary amines affords compounds of dipolar structure whereas reaction with primary and secondary amines leads to 1,4-addition products. Salts of nucleophilic inorganic anions add to arylmethylenemalonaldehydes under formation of salts of substituted malonaldehydes.

4-Dimethylamino-4-tert-butyl-1-thiabuta-1,2,3-triene. Evidence for a 1,5-dipolar structure

1978 ◽  
Vol 34 (3) ◽  
pp. 974-975 ◽  
Author(s):  
J. Galloy ◽  
J. P. Declercq ◽  
M. Van Meerssche
Keyword(s):  
Tert Butyl ◽  
Dipolar Structure

scholarly journals Ageostrophic Secondary Circulation in a Subtropical Intrathermocline Eddy

2017 ◽  
Vol 47 (5) ◽  
pp. 1107-1123 ◽  
Author(s):  
Bàrbara Barceló-Llull ◽  
Enric Pallàs-Sanz ◽  
Pablo Sangrà ◽  
Antonio Martínez-Marrero ◽  
Sheila N. Estrada-Allis ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Relative Vorticity ◽  
Secondary Circulation ◽  
Vertical Shear ◽  
Propagation Path ◽  
Ekman Pumping ◽  
Centripetal Acceleration ◽  
Omega Equation ◽  
Dipolar Structure ◽  
Upwelling And Downwelling

AbstractVertical motions play a key role in the enhancement of primary production within mesoscale eddies through the introduction of nutrients into the euphotic layer. However, the details of the vertical velocity field w driving these enhancements remain under discussion. For the first time the mesoscale w associated with an intrathermocline eddy is computed and analyzed using in situ high-resolution three-dimensional (3D) fields of density and horizontal velocity by resolving a generalized omega equation valid for high Rossby numbers. In the seasonal pycnocline the diagnosed w reveals a multipolar structure with upwelling and downwelling cells located at the eddy periphery. In the main pycnocline w is characterized by a dipolar structure with downwelling velocities upstream of the propagation path and upwelling velocities downstream. Maximum values of w reach 6.4 m day−1. An observed enhancement of chlorophyll-a at the eddy periphery coincides with the location of the upwelling and downwelling cells. Analysis of the forcing terms of the generalized omega equation indicates that the mechanisms behind the dipolar structure of the w field are a combination of horizontal deformation and advection of vertical relative vorticity by ageostrophic vertical shear. The wind during the eddy sampling was rather constant and uniform with a speed of 5 m s−1. Diagnosed nonlinear Ekman pumping leads to a dipolar pattern that mirrors the inferred w. Horizontal ageostrophic secondary circulation is dominated by centripetal acceleration and closes the dipole w structure. Vertical fluxes act to maintain the intrathermocline eddy structure.

On structural stability for an elastic body with voids having dipolar structure

2019 ◽  
Vol 32 (1) ◽  
pp. 147-160 ◽  
Author(s):  
Marin Marin ◽  
Andreas Öchsner ◽  
Daniel Taus
Keyword(s):  
Elastic Body ◽  
Structural Stability ◽  
Dipolar Structure

scholarly journals Multi-frequency pulsar studies at high radio frequencies

1996 ◽  
Vol 160 ◽  
pp. 279-282
Author(s):  
Michael Kramer ◽  
Kiriaki M. Xilouris
Keyword(s):  
Magnetic Field ◽  
Flux Density ◽  
Stellar Surface ◽  
Active Part ◽  
Frequency Range ◽  
Density Spectrum ◽  
Density Measurements ◽  
Radio Frequencies ◽  
Dipolar Structure ◽  
The Magnetic Field

AbstractWe report flux density measurements, polarimetric and timing observations of pulsars made at the highest radio frequencies to date, covering the widest frequency range from 1.4 GHz to 86 GHz. We find that the magnetic field maintains its dipolar structure throughout the active part of the magnetosphere, a region located close to the stellar surface and confined to a small slab of a few stellar radii. The change in width and shape of pulse profiles saturates at mm-wavelengths while the depolarization accelerates, leading to almost completely depolarized emission. Two pulsars seem to exhibit a turn-up in their flux density spectrum at mm-wavelengths.

A generalization of the Saint-Venant’s principle for an elastic body with dipolar structure

2019 ◽  
Vol 32 (1) ◽  
pp. 269-278 ◽  
Author(s):  
Marin Marin ◽  
Andreas Öchsner ◽  
Eduard M. Craciun
Keyword(s):  
Elastic Body ◽  
Dipolar Structure

Bonding in the P(PH3)2 and N(PH3)2 Cations. An ab initio Study

1985 ◽  
Vol 40 (9) ◽  
pp. 1149-1151 ◽  
Author(s):  
Wolfgang W. Schoeller
Keyword(s):  
Ab Initio ◽  
Phosphorus Atom ◽  
Negative Charge ◽  
Ab Initio Study ◽  
Polarization Functions ◽  
D Orbitals ◽  
Dipolar Structure ◽  
Scf Calculations

Ab initio SCF calculations at a double-ζ level were perform ed on the cations N(PH3)2+ and P(PH3)2+. Although both structures are isoelectronic, their bonding situation is different. The latter corresponds to a dipolar structure (phosphide) with considerable negative charge at the central phosphorus atom. The d-orbitals contribute to bonding as polarization functions rather than participate in hybridization.

On a thermoelastic material having a dipolar structure and microtemperatures

2020 ◽  
Vol 80 ◽  
pp. 827-839 ◽  
Author(s):  
Marin Marin ◽  
Adina Chirilă ◽  
Lavinia Codarcea-Munteanu
Keyword(s):  
Thermoelastic Material ◽  
Dipolar Structure
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