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81.
Alexander A. Teran Maureen H. Tang Scott A. Mullin Nitash P. Balsara 《Solid State Ionics》2011,203(1):18-21
The ionic conductivity, σ, of mixtures of poly(ethylene oxide) (PEO) and lithium bis(trifluoromethanesulfone)imide (LiTFSI) was measured as a function of molecular weight of the PEO chains, M, over the range 0.2-5000 kg/mol. Our data are consistent with an expression σ = σ0 + K/M proposed by Shi and Vincent [Solid State Ionics 60 (1993)] where σ0 and K are exponential and linear functions of inverse temperature respectively. Explicit expressions for σ0 and K are provided. 相似文献
82.
Scott A. Mullin Alexander A. Teran Rodger Yuan Nitash P. Balsara 《Journal of Polymer Science.Polymer Physics》2013,51(12):927-934
We have studied the effect of thermal history on ionic conductivity of block copolymer electrolytes. Previous work on block copolymer electrolytes composed of polystyrene‐b‐poly(ethylene oxide) (SEO) and lithium bis(trifluoromethanesulfone) imide (LiTFSI) salt was restricted to lamellar morphologies. This study addresses both cylindrical and lamellar morphologies. The conductivity of low molecular weight samples decreases after they are annealed. In contrast, the conductivity of high molecular weight samples is generally unaffected by annealing. These results are explained in the context of connectivity and composition of the conducting phase. © 2013 Wiley Periodicals, Inc. J. Polym. Sci. Part B: Polym. Phys. 2013 , 51, 927–934 相似文献
83.
F.?Lalo? W. J.?Mullin 《The European Physical Journal B - Condensed Matter and Complex Systems》2009,70(3):377-396
When independent Bose-Einstein condensates (BEC), described quantum
mechanically by Fock (number) states, are sent into interferometers, the
measurement of the output port at which the particles are detected provides a
binary measurement, with two possible results ±1. With two interferometers
and two BEC’s, the parity (product of all results obtained at each
interferometer) has all the features of an Einstein-Podolsky-Rosen quantity,
with perfect correlations predicted by quantum mechanics when the settings
(phase shifts of the interferometers) are the same. When they are different,
significant violations of Bell inequalities are obtained. These violations do
not tend to zero when the number N of particles increases, and can therefore
be obtained with arbitrarily large systems, but a condition is that all
particles should be detected. We discuss the general experimental requirements
for observing such effects, the necessary detection of all particles in
correlation, the role of the pixels of the CCD detectors, and that of the
alignments of the interferometers in terms of matching of the wave fronts of
the sources in the detection regions.
Another scheme involving three interferometers and three BEC’s is discussed;
it leads to Greenberger-Horne-Zeilinger (GHZ) sign contradictions, as in the
usual GHZ case with three particles, but for an arbitrarily large number of
them. Finally, generalizations of the Hardy impossibilities to an arbitrarily
large number of particles are introduced. BEC’s provide a large versality for
observing violations of local realism in a variety of experimental arrangements. 相似文献
84.
Characteristic features of the transition to turbulence in standard Taylor-Couette flow are the persistence of cellular structure and residual temporal order to high values of the Reynolds number R. We report here the results of an experimental investigation in a non-standard system which has discrete symmetries. The transition process is found to be charged qualitatively and has features common to other non-linear systems. In addition, a state of temporal and spatial chaos is achieved at moderate values of R. 相似文献
85.
R. C. Mullin 《Aequationes Mathematicae》1968,1(1-2):206-206
86.
87.
It is shown that if there is a Room design of sidev
1 and a Room design of sidev
2 containing a subdesign of sidev
3, then there exists a design of side v1 (v2 — v3)+v3, provided thats = v
2 — v3 6. Further, ifs 0, each of the 3 initial designs is isomorphic to a subdesign of the resultant design. It is also shown that there exist Room designs of sidev for all Fermat primesv > 65537. 相似文献
88.
Akimoto H Candela D Xia JS Mullin WJ Adams ED Sullivan NS 《Physical review letters》2003,90(10):105301
Spin-echo experiments are reported for 3He-4He solutions under extremely high B/T conditions, B=14.75 T and T>or=1.73 mK. The 3He concentration x(3) was adjusted close to the value x(c) approximately 3.8% at which the spin-rotation parameter muM0 vanishes. In this way the transverse and longitudinal spin-diffusion coefficients D( perpendicular ),D( parallel ) were measured while keeping |muM(0)|<1. It is found that the temperature dependence of D( perpendicular ) deviates strongly from 1/T(2), with anisotropy temperature T(a)=4.26(+0.18)(-0.44) mK. This value is close to the theoretical prediction for dilute solutions and suggests that spin current relaxation remains finite as the temperature tends to zero. 相似文献
89.
A recent extension of the recurrence-rate correlation technique of Erdmann and Gellert has been used to measure fluctuating cellular flows between concentric cylinders with the inner cylinder rotating. The length of the fluid-filled annulus was smaller than in most previous experiments of this kind. Direct velocity correlation measurements have revealed unexpected features in the development of these flows with increasing Reynolds number. The transition process was found to retain temporal order to a greater extent than indicated by many previous observations. 相似文献
90.
We present the results of an experimental investigation of a network of nonlinear coupled oscillators which are coupled in feed-forward mode. By exploiting the nonlinear response of each oscillator near its intrinsic Hopf bifurcation point, we have found remarkable amplification of small signals over a narrow bandwidth with a large dynamic range. The effect is exploited to extract a small amplitude periodic signal from an input time series which is dominated by noise. Specifically, we have used this relatively simple experimental system to measure responses with a bandwidth of approximately 1% of the central frequency, amplifications of approximately 60 dB, and a dynamic range of approximately 80 dB and can extract signals from a time series with a signal to noise ratio of approximately -50 dB. 相似文献