1,721,407 research outputs found
Linguistic validation of the Sex Fantasy Questionnaire into the Italian language
No full textObjectives: The purpose of the present linguistic validation is to provide a culturally and semantically appropriate Italian version of the Sex Fantasy Questionnaire (SFQ), as well as some preliminary results about its construct validity and internal consistency. Material and methods: A linguistic validation based on a standardized procedure was performed. Then, a confirmatory factor analysis (CFA) was conducted to assess the fit of the proposed model and the internal consistency of each factor was provided. Overall, 498 cisgender heterosexual participants took part in the preliminary psychometric testing of the SFQ: 322 men (M age = 32.67; S.D. = 8.93) and 166 women. (M age = 26.85; S.D. age = 8.87). Results: Results from the CFA on the updated version of the SFQ revealed an acceptable but not ideal goodness of fit. Conclusion: The Italian version of the SFQ should be used carefully. Indeed, given the short time needed for its administration, is its utilization could be helpful to develop and assess new and more valid questionnaires
Population gradients in the Sloan Digital Sky Survey Galaxy Catalogue: The role of merging
Full text linkWe investigate the role of the environment on the colour and stellar population gradients in a local sample of ∼3500 central and ∼1150 satellite Sloan Digital Sky Survey (SDSS) early-type galaxies. The environment is parametrized in terms of the number of satellite galaxies, N gal, in each group. For central galaxies, we find that both optical colour and mass-to-light (M/L) ratio gradients are shallower in central galaxies residing in denser environments (higher N gal). This trend is driven by metallicity gradients, while age gradients appear to be less dependent on the environment and to have a larger scatter. On the other hand, satellites do not show any differences in terms of the environment. The same results are found if galaxies are classified by central age, and both central and satellite galaxies have shallower gradients if they are older and steeper gradients if younger, satellites being independent of ages. In central galaxies, we show that the observed trends can be explained with the occurrence of dry mergings, which are more numerous in denser environments and producing shallower colour gradients because of more uniform metallicity distributions due to the mixing of stellar populations, while no final clues about merging occurrence can be obtained for satellites. Finally, we discuss all systematics on stellar population fitting and their impact on the final results. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Some astrophysical implications of dark matter and gas profiles in a new galaxy cluster model
No full textA mathematical model of charge and discharge for lead batteries in electric road vehicles
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