Unique Hue Judgment in Different Languages: A Comparison of Korean and English

Three experiments investigated unique hues (Hering, 1878) in native Korean and English speakers. Many recent studies have shown that color categories differ across languages and cultures, challenging the proposal that a particular set of color categories is universal and potentially innate. Unique hue judgments, and selection of the best examples of those categories have also been found to vary within an English-speaking population. Here we investigated unique hue judgments and possible discrepancies between unique hue and best example judgments in two languages. Experiment 1 found that the loci of unique hues were similar for English and Korean speakers. Experiment 2 replicated and extended this result, using both single and double hue scaling. Experiment 3 showed that, in both cultures, unique hue choices depended on the range, and organization of the array from which participants chose. The results of this study suggest that unique hue judgments vary according to the experimental task, in both language

Cronin effect for protons and pions in pA collisions

Pions and protons production cross-sections are analyzed in proton-proton and proton-nucleus collisions at the RHIC energy at midrapidity. We employ the pQCD factorization scheme supplemented with the color-dipole formalism to investigate the Cronin effect. We calculate the broadening in the color-dipole approach for different centralities. Our main goal is to investigate, in a parameter-free manner within a unified framework, how much of the cronin effect for both pions and baryons comes from the transverse momentum broadening due to initial partons multi-scatterings. We conclude that final-state effects in pA collisions are important. Uncertainties in nuclear shadowing of various parton distributions and parton fragmentation functions are also discussed.Comment: 7 pages, 8 figure

First-principles calculations of magnetization relaxation in pure Fe, Co, and Ni with frozen thermal lattice disorder

The effect of the electron-phonon interaction on magnetization relaxation is studied within the framework of first-principles scattering theory for Fe, Co, and Ni by displacing atoms in the scattering region randomly with a thermal distribution. This "frozen thermal lattice disorder" approach reproduces the non-monotonic damping behaviour observed in ferromagnetic resonance measurements and yields reasonable quantitative agreement between calculated and experimental values. It can be readily applied to alloys and easily extended by determining the atomic displacements from ab initio phonon spectra

Solar wind charge exchange X-ray emission from Mars Model and data comparison

Aims. We study the soft X-ray emission induced by charge exchange (CX) collisions between solar-wind, highly charged ions and neutral atoms of the Martian exosphere. Methods. A 3D multi species hybrid simulation model with improved spatial resolution (130 km) is used to describe the interaction between the solar wind and the Martian neutrals. We calculated velocity and density distributions of the solar wind plasma in the Martian environment with realistic planetary ions description, using spherically symmetric exospheric H and O profiles. Following that, a 3D test-particle model was developed to compute the X-ray emission produced by CX collisions between neutrals and solar wind minor ions. The model results are compared to XMM-Newton observations of Mars. Results. We calculate projected X-ray emission maps for the XMM-Newton observing conditions and demonstrate how the X-ray emission reflects the Martian electromagnetic structure in accordance with the observed X-ray images. Our maps confirm that X-ray images are a powerful tool for the study of solar wind - planetary interfaces. However, the simulation results reveal several quantitative discrepancies compared to the observations. Typical solar wind and neutral coronae conditions corresponding to the 2003 observation period of Mars cannot reproduce the high luminosity or the corresponding very extended halo observed with XMM-Newton. Potential explanations of these discrepancies are discussed.Comment: 10 pages, 5 figures, accepted for publication in Astron. Astrophysic

eXtended Reality for Education and Training

L'abstract è presente nell'allegato / the abstract is in the attachmen