8,931 research outputs found
On the Uniqueness of an Orthogonality Property of the Legendre Polynomials
No full textWe prove uniqueness of an orthogonality of the Legendre polynomials discussed elsewhere
La ceramica medievale e postmedievale
No full textThe author analyses 120 ceramic sherds (plus a small number of non-vessel objects) from the medieval and post-medieval phases of Mot del Castel. The resulting picture is distinctive: almost all the material comes from late medieval and Renaissance levels (Phase VI and cleaning layers), when the area had become an open cultivated space, and coarse utilitarian cooking wares are markedly under-represented in comparison with glazed and slipped wares. After a methodological introduction, the main classes are distinguished: common kitchen ware (very few examples), early medieval glazed ware in residual position, slipped and polychrome sgraffito, Renaissance sgraffito, and tin-glazed ceramics. The earliest fragments belong to late antique–early medieval glazed wares (6th–7th centuries), found in later contexts and interpreted as evidence for occupation prior to the visible settlement phases. The bulk of the assemblage belongs to the late medieval and Renaissance periods: bowls and dishes in polychrome slipped sgraffito with vegetal and geometric motifs; late “archaic” sgraffito of the 14th century and “Renaissance” sgraffito (15th–early 16th centuries) characteristic of the Alpine Lombard area; tin-glazed wares with polychrome decoration (blue, turquoise, green, manganese brown), attributable to specialised extra-Alpine productions (probably Romagnol, such as Faenza). Some fragments, such as a tin-glazed albarello, point to containers for high-value or pharmaceutical substances. Although heavily fragmented, the assemblage allows several observations: at Piuro, the ready availability of pietra ollare reduced the need for ceramic cooking ware, while glazed and slipped table and storage wares are well attested and in line with consumption trends in late medieval Lombardy. Even when residual, the earliest glazed ceramics and the range of later productions illustrate the site’s participation in the same circulation networks that affected Valtellina and the Po Plain, involving both imports and local imitations
WARE, CHARLES P.
No full textTitle: Papers, ca. 1862-1907 Description: 1 linear ft.
Notes: Abolitionist and educator of Boston, MA; and civilian administrator in the Union Army-occupied Sea Islands, South Carolina, the first Confederate territory to be brought under Northern control. Correspondence, plantation records, and documents relating to Ware\u27s work as a supervisor of freedmen on plantations at Port Royal, South Carolina during the Civil War. Correspondents include Edward S. Philbrick and Ware\u27s sisters, Emma Ware and Harriet Ware. Gift of Caroline F. Ware, 1961.
Subjects: Afro-Americans -- Sea Islands. Freedmen -- South Carolina -- Port Royal -- Government policy. Philbrick, Edward Southwick, 1827-1889, correspondent. Plantations -- South Carolina -- Port Royal. Port Royal (SC) -- History. South Carolina -- History -- Civil War, 1861-1865. United States -- History -- Civil War, 1861-1865 -- Afro-Americans. Ware, Emma Forbes, 1838-1898, correspondent. Ware, Harriet, 1834-1920, correspondent.
Location: Howard University, Moorland-Spingarn Research Center (Washington, DC) NIDS Fiche #: 4.72.118 NUCMC #: DCLV96-A57
Mid-tropospheric supercooled liquid water observation consistent with nucleation induced by a mountain lee wave
No full textVitalistic information systems in the South African public health system : a transactional analysis perspective
No full textIncludes bibliographical references
Influence of composition on some industrially relevant properties of traditional sanitary-ware glaze
No full textTwo series of glazes have been produced from different combinations of the same raw materials in the range of interest for sanitary-ware applications: they are designed to allow one to get insight into network-forming and network-modifying species. Fusibility tests and hot stage microscope observations show the influence of even low differences in the starting chemical compositions on the transformation temperatures. X-ray powder diffraction, wavelength dispersion spectrometry and scanning electron microscopy prove that: (i) zircon, the most abundant crystalline phase, is homogeneously distributed and decreases by a 3% from its starting value; (ii) the glass-phase of glaze has a quasi-uniform composition. X-ray synchrotron radiation micro-tomography shows that glaze porosity is 15% by volume, and voids are prevalently not interconnected and with size up to 50 μm. The linear thermal expansion of the glass phase of glaze ranges between 6 and 7 × 10 -6 °C -1, without apparent correlation with composition
The role of firing temperature, firing time and quartz grain size on phase-formation, thermal dilatation and water absorption in sanitary-ware vitreous bodies
No full textThis work reports a study on (i) the evolution of mineral phases versus time and temperature, and (ii) some relationships between phases observed, process parameters, and macroscopic properties (thermal expansion and water absorption), in sanitary-ware vitreous bodies. These properties are relevant to satisfying the technical requirements of sanitary-ware. We have fixed the green body composition, varying some key process parameters, such as firing temperature (Tf), firing time (tf) and quartz grain size (d50); a grid of 30 Tf-tf-d50 points has been explored. We have spanned the tf-Tf space (0-80min; 1200-1280°C) using firing temperatures representative of the plateau values of the heating curve in industrial processes. X-ray powder diffraction has been used to determine the phase composition for each Tf-tf-d50 point. Scanning electron microscopy proved useful in enhancing the micro-structural characterization. Quartz d50 seems to be the process-parameter which most effectively co-relates with the thermal expansion of the glassy matrix
An insight view on archeology and archaeometry of "Pompei Forum black glaze ware": IV-II/I B.C
No full textInternational audienceThe contribution presents data part of a wider interdisciplinary project focused on the study of ceramics from excavations carried out in 1980-81 by P. Arthur in the forum of Pompeii and coordinated by one of the authors (D. Cottica) in collaboration with the local Soprintendenza. Ceramic study allowed identifying a local black-glazed production of fine wares, including black glaze ware, characterized by a distinctive light brown clay. Of great interest is a deposit (X 11B) containing black glaze finished and unfinished fragments, together with kiln spaces, dating to the late IV early III century B.C. From a macroscopic point of view, among the ceramics from the forum area (all strata) it was possible to identify two sub-groups (or series) of BG characterized by some differences in clay and glaze appearance, as well as in chronology and morphological repertoire. These two series have been conventionally termed “Pompeii Forum A” and “Pompeii Forum B”. From the chronological point of view, this BG production spans from the IV and the II-I century B.C. and is attested by more than 4000 fragments. The proposed contribution will illustrate and discuss the archeological data together with results from a recent archaeometric project of analysis and characterization of this BG pottery production, carried out by the University of Calabria. Furthermore, in order to identify the likely provenance area of raw material used at Pompeii, Mio-Pliocenic clayey samples collected in the Salerno area have been analyzed by XRF and PXRD analysis and compared with chemical and mineralogical data related to kiln spacers and ceramics of BG production series A-B. In addition, specific archaeometric analyses performed on fabric and glaze of fragments belonging to the series A and B allowed to acquire information on the technological changes that characterize the manufacture of these BG vessels through time
Lymphotoxins and cytomegalovirus cooperatively induce interferon-beta, establishing host-virus détente
No full textTumor necrosis factor (TNF)-related cytokines regulate cell death and survival and provide strong selective pressures for viruses, such as cytomegalovirus (CMV), to evolve counterstrategies in order to persist in immune-competent hosts. Signaling by the lymphotoxin (LT)-beta receptor or TNF receptor-1, but not Fas or TRAIL receptors, inhibits the cytopathicity and replication of human CMV by a nonapoptotic, reversible process that requires nuclear factor kappa B (NF-kappa B)-dependent induction of interferon-beta (IFN-beta). Efficient induction of IFN-beta requires virus infection and LT signaling, demonstrating the need for both host and viral factors in the curtailment of viral replication without cellular elimination. LT alpha-deficient mice and LT beta R-Fc transgenic mice were profoundly susceptible to murine CMV infection. Together, these results reveal an essential and conserved role for LTs in establishing host defense to CMV
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