Twistor Description of Classical Zero Mass Fields

1986 ◽  
pp. 47-57
Author(s):  
Ivan T. Todorov
Keyword(s):  
Zero Mass ◽  
Twistor Description

scholarly journals MHD stagnation point flow of micro nanofluid towards a shrinking sheet with convective and zero mass flux conditions

2017 ◽  
Vol 65 (2) ◽  
pp. 155-162 ◽  
Author(s):  
A. Rauf ◽  
S. A. Shehzad ◽  
T. Hayat ◽  
M. A. Meraj ◽  
A. Alsaedi
Keyword(s):  
Stagnation Point ◽  
Mass Flux ◽  
Numerical Technique ◽  
Convective Boundary Condition ◽  
Momentum Equation ◽  
Stagnation Point Flow ◽  
Shrinking Sheet ◽  
Convective Boundary ◽  
Electrically Conducting ◽  
Zero Mass

AbstractIn this article the stagnation point flow of electrically conducting micro nanofluid towards a shrinking sheet, considering a chemical reaction of first order is investigated. Involvement of magnetic field occurs in the momentum equation, whereas the energy and concentrations equations incorporated the influence of thermophoresis and Brownian motion. Convective boundary condition on temperature and zero mass flux condition on concentration are implemented. Partial differential equations are converted into the ordinary ones using suitable variables. The numerical technique is utilized to discuss the results for velocity, microrotation, temperature, and concentration fields.

Using Notches to Uncover Optimization Frictions and Structural Elasticities: Theory and Evidence from Pakistan *

2013 ◽  
Vol 128 (2) ◽  
pp. 669-723 ◽  
Author(s):  
Henrik J. Kleven ◽  
Mazhar Waseem
Keyword(s):  
Administrative Data ◽  
Behavioral Response ◽  
Behavioral Responses ◽  
Tax Incentives ◽  
Missing Mass ◽  
Zero Mass ◽  
Long Run ◽  
Choice Sets ◽  
Price Distortions

Abstract We develop a framework for nonparametrically identifying optimization frictions and structural elasticities using notches—discontinuities in the choice sets of agents—introduced by tax and transfer policies. Notches create excess bunching on the low-tax side and missing mass on the high-tax side of a cutoff, and they are often associated with a region of strictly dominated choice that would have zero mass in a frictionless world. By combining excess bunching (observed response attenuated by frictions) with missing mass in the dominated region (frictions), it is possible to uncover the structural elasticity that would govern behavior in the absence of frictions and arguably capture long-run behavior. We apply our framework to tax notches in Pakistan using rich administrative data. While observed bunching is large and sharp, optimization frictions are also very large as the majority of taxpayers in dominated ranges are unresponsive to tax incentives. The combination of large observed bunching and large frictions implies that the frictionless behavioral response to notches is extremely large, but the underlying structural elasticity driving this response is nevertheless modest. This highlights the inefficiency of notches: by creating extremely strong price distortions, they induce large behavioral responses even when structural elasticities are small.

scholarly journals Black holes with zero mass

2000 ◽  
Vol 17 (19) ◽  
pp. 4051-4058 ◽  
Author(s):  
Ulises Nucamendi ◽  
Daniel Sudarsky
Keyword(s):  
Black Holes ◽  
Zero Mass

scholarly journals The Proca Field in Curved Spacetimes and its Zero Mass Limit

2018 ◽  
Vol 82 (2) ◽  
pp. 203-239
Author(s):  
Maximilian Schambach ◽  
Ko Sanders
Keyword(s):  
Mass Limit ◽  
Zero Mass ◽  
Proca Field ◽  
Curved Spacetimes

Causal viscous universe coupled with zero-mass scalar field in higher derivative theory

2011 ◽  
Vol 334 (1) ◽  
pp. 187-191 ◽  
Author(s):  
N. Ibotombi Singh ◽  
S. Surendra Singh ◽  
S. Romaleima Devi
Keyword(s):  
Scalar Field ◽  
Zero Mass ◽  
Higher Derivative
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