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About 10,000 papers for “Absolute scale”

LARGE SCALE ABSOLUTE EXTENSORS

2016

This paper is devoted to dualization of dimension-theoretical results from the small scale to the large scale. So far there are two approaches for such dualization: one consisting of creating analogs of small scale concepts using covers and the other amounting to the covering dimension of the Higson corona ν ( X ) of X . The first approach was used by M. Gromov when defining the asymptotic dimension asdim ( X ) of metric spaces X . The second approach was implicitly contained in the paper [6] by Dranishnikov on asymptotic topology. It is not known if the two approaches yield the same concept. However, Dranishnikov–Keesling–Uspenskiy proved dim ( ν ( X ) ) ≤ asdim ( X ) and Dranishnikov established that dim ( ν ( X ) ) = asdim ( X ) provided asdim ( X ) < ∞ . We characterize asymptotic dimension (for spaces of finite asymptotic dimension) in terms of extensions of slowly oscillating functions to spheres. Our approach is specifically designed to relate asymptotic dimension to the covering dimension of the Higson corona ν ( X ) in case of proper metric spaces X . As an application, we recover the results of Dranishnikov–Keesling–Uspenskiy and Dranishnikov.

Cited by 6

Absolute Scale of Oscillator Strengths

C. W. Allen, C.H. Corliss · Monthly Notices of the Royal Astronomical Society · 1963

Oscillator strengths for Sc, Ti, V, Cr, Mn, Fe, Co and Ni which had been assembled at the University of London Observatory and adjusted to an absolute scale based on the f -sum rule are compared with independent measurements for the same atoms which had been made at the National Bureau of Standards and adjusted to an absolute scale based on experimental values. The systematic logarithmic difference is U.L.O.–N.B.S.= –0.19 ± 0.04dex. Possible errors are discussed and it is concluded that either method may be used for obtaining extensive absolute f -values with an accuracy of about ± 0.2 dex.

Cited by 6Open access

Absolute scale of thermoelectricity III

R. B. Roberts, F. Righini, R.C. Compton · Philosophical Magazine B · 1985

Abstract We have measured the Thomson coefficient μ of platinum and tungsten from 900 to 1600 K and calculated the absolute thermopower S of each. We describe a numerical technique for evaluating the temperature profile of a wire which is undergoing self-heating by direct current and discuss the experimental design problems associated with measuring μ at high temperatures. We develop a method in which the direction of the current through the specimen is reversed about once per second and observe the rates of heating and cooling at different places with an optical pyrometer. By changing the magnitude of the current at the same time as its reversal the change in the Joule heating is balanced with the change in the Thomson heating. We describe a technique for calibrating the pyrometer, report measurements of μPL and μW, calculate S Pt and S w, and test the results according to Kelvin's relation, S = f μ/T dT. The difference between our S Pt, and that given by Cusack and Kendall (1958) varies from −0·7μV K−1 at 900K to −0·4 μV K−1 at 1600K, whereas our estimated uncertainty varies from ± 0·05 to ± 0·2 μ V K−1 over the same range.

Cited by 73

Large-scale absolute surface reconstruction

Gaofeng Wu, Haiyang Quan, Weihong Song et al. · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2016

In order to realize large-scale absolute surface reconstruction, a generalized iterative optimization method for solving the three-flat problem is studied. First, the idea of model-based absolute surface reconstruction is proposed, which considers the problems of absolute surface reconstruction as inverse problems. Then we take the three-flat problems as an example, we introduced two generalized iterative optimization methods for three-flat model. Finally, by both simulation and experiment, it is concluded that the block SOR method with an optimal relaxation factor converges much faster and saves more computational costs and memory space without reducing accuracy. Both simulation and experimental results indicate that the proposed iterative optimization methods are effective for solving the three-flat problem with pixel-level spatial resolution and the measuring precision of two separate measurements is 0.6 nm rms, and the cross-check test result is 0.8 nm rms. It is concluded that the proposed method can correctly reconstruct absolute figures with high efficiency and pixel-level spatial resolution.

Cited by 0

The IUE Absolute Flux Scale

Gonzalez-Riestra, R., Cassatella, A., Wamsteker, W. · Strasbourg Astronomical Data Center · 2001

Cited by 0Open access

Anchoring the Absolute Proton Affinity Scale

Gábor Czakó, Edit Mátyus, Andrew C. Simmonett et al. · Journal of Chemical Theory and Computation · 2008

Converged first-principles proton affinities (PA) of ammonia and carbon monoxide have been determined by the focal-point analysis (FPA) approach, thus fixing the high and low ends of the molecular proton affinity scale. The electronic structure computations employed the all-electron (AE) coupled-cluster (CC) method up to single, double, triple, quadruple, and pentuple excitations. Aug-cc-pCVXZ [X = 2(D), 3(T), 4(Q), 5, and 6] correlation-consistent (cc) Gaussian basis sets for C, N, and O were used in conjunction with the corresponding aug-cc-pVXZ (X = 2-6) sets for H. Our FPA study supersedes previous computational work by accounting for (a) electron correlation beyond the "gold standard" CCSD(T) level; (b) the nonadditivity of core electron correlation effects; (c) scalar relativity; (d) diagonal Born-Oppenheimer corrections (DBOC); (e) anharmonicity of zero-point vibrational energies, based on accurate AE-CCSD(T)/cc-pCVQZ internal coordinate quartic force fields and fully variational vibrational computations; and (f) thermal corrections to enthalpies by direct summation over rovibrational energy levels. Our final proton affinities at 298.15(0.0) K are ΔpaH°(NH3) = 852.6(846.4) ± 0.3 kJ mol(-1) and ΔpaH°(CO) = 592.4(586.5) ± 0.2 kJ mol(-1). These values have better accuracy and considerably lower uncertainty than the best previous recommendations and thus anchor the proton affinity scale of molecules for future use.

Cited by 45

economies of scale indivisibilities absolute advantage

Greg Linden · Palgrave Macmillan eBooks · 2013

The Palgrave Encyclopedia of Strategic Management has been written by an international team of leading academics, practitioners and rising stars and contains almost 550 individually commissioned entri

Cited by 0

Fixed-Scale Mechanism of Absolute Pitch

Paul T. Brady · The Journal of the Acoustical Society of America · 1970

With intensive training, the author, who had no previous ability in identification of randomly presented tones from the 12-tone musical scale, achieved performance level of 65% exactly correct and 97% correct within ±1 half-step (semitone). The training task consisted of spending many hours hearing and identifying randomly presented tones with feedback on the judgments. Successful acquisition of absolute-tone identification contributes to the evidence that an adult can learn this task, but apparently only with great effort. It is suggested that naturally occurring absolute pitch is not an innate ability. Rather, this skill results from perceiving only one musical scale (for example, C-major), and if music is played in a different scale, the notes retain their C-major perceptual values. This mechanism, which is probably acquired in early childhood, can account for much of the introspective and performance data from possessors and nonpossessors of absolute pitch.

Cited by 82

Probing the Absolute Neutrino Mass Scale

J. A. Formaggio · AIP conference proceedings · 2006

Over the past decade, experiments studying neutrinos from atmospheric, solar, and reactor sources have shown conclusively that neutrinos change flavor and, as a consequence, have a small but finite mass. Yet, the scale of neutrino masses remains an open question that is of great importance for many areas of physics. The absolute value of neutrino‐masses will have crucial implications for cosmology, astrophysics and particle physics. The Karlsruhe Tritium Neutrino (KATRIN) experiment is the next generation tritium beta decay experiment with sub‐eV sensitivity to make a direct, model independent measurement of the electron neutrino mass. The principle of the experiment is to look for a distortion at the high energy endpoint of the electron spectrum of tritium beta decay. KATRIN will reach a final sensitivity of 200 meV at 90% C.L. on the absolute neutrino mass scale.

Cited by 0

Dense Depth Estimation with Absolute Scale

Xing Jin, Zhiwen Yao, Jingjing Zhang · 2018

Considering the difficulties in estimating depth from single image, in this paper, we propose a method to obtain the absolute scale depth map by combining the convolution neural network and depth filter. We compute relative transformation between consecutive frames by direct tracking features, which are extracted from RGB images and whose depthes are predicted by deep network, and then optimize relative motion by searching for a better feature alignment in epipolar line, and finally update every pixel depth of the reference frame by depth filter. We evaluate the proposed method on the open dataset comparison against the state of the art in depth estimation to evaluate our method.

Cited by 0