10,684 research outputs found
A Wage-Increase Permit Plan to Stop Inflation
macroeconomics, inflation, policy, wage-increase
Scaling Theory for Steady State Plastic Flows in Amorphous Solids
Strongly correlated amorphous solids are a class of glass-formers whose
inter-particle potential admits an approximate inverse power-law form in a
relevant range of inter-particle distances. We study the steady-state plastic
flow of such systems, firstly in the athermal, quasi-static limit, and secondly
at finite temperatures and strain rates. In all cases we demonstrate the
usefulness of scaling concepts to reduce the data to universal scaling
functions where the scaling exponents are determined a-priori from the
inter-particle potential. In particular we show that the steady plastic flow at
finite temperatures with efficient heat extraction is uniquely characterized by
two scaled variables; equivalently, the steady state displays an equation of
state that relates one scaled variable to the other two. We discuss the range
of applicability of the scaling theory, and the connection to density scaling
in supercooled liquid dynamics. We explain that the description of transient
states calls for additional state variables whose identity is still far from
obvious.Comment: 9 pages, 9 figure
Analysis of microwave radiometric measurements from Skylab
There are no author-identified significant results in this report
Pseudo diamagnetism of four component exciton condensates
We analyze the spin structure of the ground state of four-component exciton
condensates in coupled quantum wells as a function of spin-dependent
interactions and applied magnetic field. The four components correspond to the
degenerate exciton states characterized by and spin projections
to the axis of the structure. We show that in a wide range of parameters, the
chemical potential of the system increases as a function of magnetic field,
which manifests a pseudo-diamagnetism of the system. The transitions to
polarized two- and one-component condensates can be of the first-order in this
case. The predicted effects are caused by energy conserving mixing of
and excitons.Comment: 4 pages, 2 figure
Investigation of battery active nickel oxides Final report
Identification and characterization of battery active compound structures formed on nickel oxide electrode during charging and dischargin
On pointwise and weighted estimates for commutators of Calder\'on-Zygmund operators
In recent years, it has been well understood that a Calder\'on-Zygmund
operator is pointwise controlled by a finite number of dyadic operators of
a very simple structure (called the sparse operators). We obtain a similar
pointwise estimate for the commutator with a locally integrable
function . This result is applied into two directions. If , we
improve several weighted weak type bounds for . If belongs to the
weighted , we obtain a quantitative form of the two-weighted bound for
due to Bloom-Holmes-Lacey-Wick.Comment: V3: Lemma 5.1 is corrected. We would like to thank Irina Holmes for
pointing out an error in the previous versio
Statistical Physics of Elasto-Plastic Steady States in Amorphous Solids: Finite Temperatures and Strain Rates
The effect of finite temperature and finite strain rate on
the statistical physics of plastic deformations in amorphous solids made of
particles is investigated. We recognize three regimes of temperature where the
statistics are qualitatively different. In the first regime the temperature is
very low, , and the strain is quasi-static. In this regime
the elasto-plastic steady state exhibits highly correlated plastic events whose
statistics are characterized by anomalous exponents. In the second regime
the system-size dependence of the
stress fluctuations becomes normal, but the variance depends on the strain
rate. The physical mechanism of the cross-over is different for increasing
temperature and increasing strain rate, since the plastic events are still
dominated by the mechanical instabilities (seen as an eigenvalue of the Hessian
matrix going to zero), and the effect of temperature is only to facilitate the
transition. A third regime occurs above the second cross-over temperature
where stress fluctuations become dominated by thermal
noise. Throughout the paper we demonstrate that scaling concepts are highly
relevant for the problem at hand, and finally we present a scaling theory that
is able to collapse the data for all the values of temperatures and strain
rates, providing us with a high degree of predictability.Comment: 12 pages, 13 figure
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