33,328 research outputs found

    Housework and couple satisfaction: Satisfaction with housework division and gender ideology among Italian dual-earner couples

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    This article reports on a study that examined the division of housework in 105 Italian dual-earner couples and the relationships between this division, the participants\u2019 satisfaction with it, gender ideology, and couple satisfaction. The findings show that women devoted much more time to housework than men, performed a greater number of routine female tasks, and reported lower levels of satisfaction with housework arrangements. However, women and men did not differ in levels of couple satisfaction. Satisfaction with housework distribution was found to mediate the relationship between actual housework performance and couple satisfaction in different ways for women and men: Women\u2019s couple satisfaction was explained by satisfaction with the distribution of traditionally female (routine) tasks and men\u2019s couple satisfaction was linked to satisfaction with the distribution of hours devoted to housework. Gender ideology directly influenced couple satisfaction: Women and men with less traditional gender ideologies were more satisfied with their relationships

    Characterization of Ulrich bundles on Hirzebruch surfaces

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    In this work we characterize Ulrich bundles of any rank on polarized rational ruled surfaces over P1\mathbb{P}^1. We show that every Ulrich bundle admits a resolution in terms of line bundles. Conversely, given an injective map between suitable totally decomposed vector bundles, we show that its cokernel is Ulrich if it satisfies a vanishing in cohomology. As a consequence we obtain, once we fix a polarization, the existence of Ulrich bundles for any admissible rank and first Chern class. Moreover we show the existence of stable Ulrich bundles for certain pairs (rk(E),c1(E))(\textrm{rk}(E),c_1(E)) and with respect to a family of polarizations. Finally we construct examples of indecomposable Ulrich bundles for several different polarizations and ranks.Comment: 23 pages. Incorporated Section 5 in the other sections. Added Section 6 on existence and moduli space of Ulrich bundles. Final version in Revista Matematica Complutens

    Spatial planning and architectural innovation in the Roman town of Ocriculum.

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    The Roman settlement of Ocriculum (Otricoli, TR - Umbria), built on a tufa slope between the Tiber valley to the north and the San Vittore valley to the south, was established on massive substructures, which allowed the exploitation of a larger area. Albeit being relatively neglected by modern scholarship, these structures are none the less crucial to a thorough analysis of the urban planning of Ocriculum. Two buildings are mutually connected inside the city, even if they were not built at the same time: the bath complex, built in the mid-2nd century AD and restored until the 4th-5th cent. AD, and the underlying culvert, in which the San Vittore still flows, which was certainly built before the baths and most likely alongside the substructures. This artificial terrace, on which the baths lie and under which the channel runs, has been the first human alteration of the slope. The bath complex, although not entirely preserved, features several interesting architectural innovations. Modern technologies were employed alongside traditional methodologies to analyse the two buildings. This allowed not only a 3D reconstruction of these structures, but also a deep knowledge of the urban development and architectural history of Ocriculum. The culvert is part of the earliest attempts to shape the natural landscape for settlement purposes. On the overlying terrace there should have lain not only the bath complex, but also the theatre scene and its porticus post scaenam (both no longer visible). For this reason, the theatre is later than the culvert and not earlier (Hay-Keay-Millet, 2013). Consequently, the close “Great Substructures” belong to the same construction phase of the theatre, because they support the thrust of the upper terrace, on which was most likely found the political and religious centre of Ocriculum. Furthermore, the octagonal hall of the baths and the smaller circular hall (the only preserved rooms of the entire complex) are an important proof of the wealth of this city. They were roofed by a so-called shellshaped dome (consisting of 41 nails) and by a dodecagonal cross-vault, consisting of six larger convex wedges alternating with six smaller ones: it seems to be a hexagonal segmental dome. The first one, built as a pluri-composed cross-vault, surely functioned as a hemispherical dome. It lies on a circular springing, that is connected with the underlying octagonal hall through triangular ashlars, covered with plaster. Both the “shell-shaped” dome and the angular connectors are an innovation and also an unicum in Roman architecture. This allows to identify Ocriculum as a very rich town, inhabited by wealthy people enriched thanks to the trades on the Tiber and the Via Flaminia, but also by famous people like Milone (Cic., Pro Milone, 24, 64) and Pompea Celerina, the rich mother-in-law of Pliny the young (Plin., Ep., I, 4, 1). Furthermore, Ocriculum was seamlessly inhabited even after the collapse of the Roman Empire. The baths have repeatedly been refurbished up to the 4th-5th century: this testifies to the importance of this building for the urban community. In the end, the absence of fortifications could be explained with the identification of this settlement near the port as a monumental detachment of the city on the top of the hill (which was never abandoned)

    Supersymmetric hadronic bound state detection at e+e−e^+e^- colliders

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    We review the possibility of formation for a bound state made out of a stop quark and its antiparticle. The detection of a signal from its decay has been investigated for the case of a e+e−e^+e^- collider.Comment: 13 pages, 11 figure
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