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101.
This paper adapts a procedure, canonical analysis of asymmetry,originally defined by Gower (1977) to the analysis of hierarchicalproperties in organizational structures. Its application is demonstratedusing two available data sets, Freeman and Freeman's (1980) data on computercommunication and Krackhardt's (1987) data on advice-giving and getting inan organization. 相似文献
102.
Summary Man-made low-dimensional magnetic systems including surfaces, interfaces and multilayers, have attracted a great amount of
attention in the past decade because, as expected, the lowered symmetry and coordination number offer a variety of opportunities
for inducing new and exotic phenomena and so hold out the promise of new device applications. Local spin density functional
(LSDF)ab initio electronic-structure calculations employing the full-potential-linearized augmented-plane-wave (FLAPW) method have played
a key role in the development of this exciting field by not only providing a clearer understanding of the experimental observations
but also predicting new systems with desired properties. One of the striking successes of theory in the last decade has been
the calculation of hyperfine fields at surfaces and interfaces. Concurrently, several groups have followed the pioneering
work of Korecki and Gradmann and have measured hyperfine fields at surfaces and interfaces. In this paper, we review new features
of hyperfine-interaction investigations in man-made materials which emphasizes how the close interplay of theoretical determinations
and experiment are essential because the hyperfine field is not proportional to the magnetization and so interpretations of
experiment are totally dependent on theory.
Paper presented at ICAME-95, Rimini, 10–16 September 1995. 相似文献
103.
104.
M.D Freeman 《Annals of Physics》1984,153(2):339-366
We use indirect, renormalization group arguments to calculate the gravitational counterterms needed to renormalize an interacting non-abelian gauge theory in curved space-time. This method makes it straightforward to calculate terms in the trace anomaly which first appear at high order in the coupling constant, some of which would need a 4-loop calculation to find directly. The role of gauge invariance in the theory is considered, and we discuss briefly the effect of using coordinate-dependent gauge-fixing terms. We conclude by suggesting possible applications of this work to models of the very early universe. 相似文献
105.
106.
107.
108.
109.
G.T.A. Squier W.E. Burcham J.M. Freeman R.J. Petty S.D. Hoath J.S. Ryder 《Nuclear Physics A》1975,242(1):62-74
The threshold energy for the reaction 35Cl(α, n)38mK has been measured to be 6674.8±3.2 keV and the Q-value for the reaction 35Cl(α, p)38Ar to be 837.2±2.4 keV. From the measurements a value of 5021.2±3.4 keV was obtained for the end-point energy of the decay 38mK(b+)38Ar. The half-life was measured as 925.6±0.7ms and hence an “effective” value was calculated, giving the result 3106±10 s with the inclusion of outer radiative corrections to order Z2α3 and 3088±10 s allowing also for calculated charge-dependent effects. 相似文献
110.
Green JS Ovchinnikov VM Evans RG Akli KU Azechi H Beg FN Bellei C Freeman RR Habara H Heathcote R Key MH King JA Lancaster KL Lopes NC Ma T MacKinnon AJ Markey K McPhee A Najmudin Z Nilson P Onofrei R Stephens R Takeda K Tanaka KA Theobald W Tanimoto T Waugh J Van Woerkom L Woolsey NC Zepf M Davies JR Norreys PA 《Physical review letters》2008,100(1):015003
Metal foil targets were irradiated with 1 mum wavelength (lambda) laser pulses of 5 ps duration and focused intensities (I) of up to 4x10;{19} W cm;{-2}, giving values of both Ilambda;{2} and pulse duration comparable to those required for fast ignition inertial fusion. The divergence of the electrons accelerated into the target was determined from spatially resolved measurements of x-ray K_{alpha} emission and from transverse probing of the plasma formed on the back of the foils. Comparison of the divergence with other published data shows that it increases with Ilambda;{2} and is independent of pulse duration. Two-dimensional particle-in-cell simulations reproduce these results, indicating that it is a fundamental property of the laser-plasma interaction. 相似文献