A method is proposed to reconstruct signals from incomplete data. The method, which can be interpreted both as a discrete implementation of the so-called prior discrete Fourier transform (PDFT) spectral estimation technique and as a variant of the algebraic reconstruction technique, allows one to incorporate prior information about the reconstructed signal to improve the resolution of the signa...

Schmittner et al. (Reports, 9 December 2011, p. 1385) report a new, low estimate of equilibrium climate sensitivity based on a comparison of Last Glacial Maximum climate model simulations and paleoproxy data. Here, we show that exclusion of questionable comparison points and constructive changes to model design are both likely capable of altering the most probable value of equilibrium climate s...

Ancient cultural changes have often been linked to abrupt climatic events, but the potential that climate can exert a persistent influence on human populations has been debated. Here, independent population, temperature, and moisture history reconstructions from the Bighorn Basin in Wyoming (United States) show a clear quantitative relationship spanning 13 ka, which explains five major periods ...

OBJECTIVES To improve (1) recognition of eyebrow ptosis, asymmetry, or deformity and (2) selection of the appropriate surgical technique based on the patient's underlying etiology. DESIGN Nonrandomized, retrospective study of patients undergoing surgical correction of eyebrow asymmetry. Forty consecutive patients were identified as having asymmetric eyebrow ptosis or deformity. Varying etiolo...

SUMMARY Secondary correction of nipple areola complex (NAC) malposition represents a major concern after breast reconstructive procedures. It is frequently requested by patients complaining about asymmetric areolas impairing the whole reconstructive procedure and asking for improved cosmetic outcomes. Several methods have been described to achieve a good symmetry between the 2 areolas, either n...

The question of which dose for screening, diagnosing ad follow-up of pulmonary nodules is a permanent issue for radiologists and radiotherapists. The proposed dose values for 2013 reflect the possibilities of the latest CT generations, from 2010 or later and include all technical novelties such as iterative reconstructions, automatic tube potential selection, and latest detectors. As the techno...

of the Dissertation Image Quality in MAP SPECT Reconstructions

Total solar irradiance reconstructed between 1978 and 2003 using solar surface magnetic field distributions is compared with three composites of total solar irradiance measurements. A good correspondence is found with the total solar irradiance composite from PMOD/WRC, with no bias between the three cycles. The agreement with the other composites (the ACRIM composite, mainly based on the Active...

Quantifying the effects of human activity on the natural environment is dependent on credible estimates of reference conditions to define the state of the environment before the onset of adverse human impacts. In Europe, emission controls that aimed at restoring ecological status were based on hindcasts from process-based models or paleolimnological reconstructions. For instance, 1860 is used i...