922 resultados para Stone carvers
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Case law report - online
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We investigated the diversity pattern of nine Swiss stone pine (Pinus cembra L.) populations along the Carpathian range including the High Tatras, by using six chloroplast DNA microsatellites (cpSSR). Our aim was to detect genetically distinct regions by clustering of populations, and to tackle possible historical colonization routes. Our analysis referred to an investigated geographical range with the two most distant populations situated at about 500 air km. We found that the most diverse populations are situated at the two edges of the investigated part, in the Retezat Mts. (South Carpathians) and the High Tatras, and diversity decreases towards the populations of the Eastern Carpathians. Hierarchical clustering and NMDS revealed that the populations of the South Carpathians with the Tatras form a distinct cluster, significantly separated from those of the Eastern Carpathians. Moreover, based on the most variable chloroplast microsatellites, the four populations of the two range edges are not significantly different. Our results, supported also by palynological and late glacial macrofossil evidences, indicate refugial territories within the Retezat Mts. that conserved rich haplotype composition. From this refugial territory Pinus cembra might have colonized the Eastern Carpathians, and this was accompanied by a gradual decrease in population diversity. Populations of the High Tatras might have had the same role in the colonizing events of the Carpathians, as positive correlation was detected among populations lying from each other at a distance of 280 km, the maximum distance between neighbouring populations.
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To characterize the genetic structure and diversity of Pinus cembra L. populations native to two disjunct geographical areas, the Alps and the Carpathians, and to evaluate the rate of genetic differentiation among populations.
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General note: Title and date provided by Bettye Lane.
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Inscriptions: Verso: [stamped] Photograph by Freda Leinwand. [463 West Street, Studio 229G, New York, NY 10014].
Evaporative Moisture Loss from Heterogeneous Stone: Material- Environment Interactions During Drying
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The complexities of evaporation from structurally and mineralogically heterogeneous sandstone (Locharbriggs Sandstone) are investigated through a laboratory-based experiment in which a variety of environmental conditions are simulated. Data reported demonstrate the significance of material-environment interactions on the spatial and temporal variability of evaporative dynamics. Evaporation from porous stone is determined by the interplay between environmental, material and solution properties, which govern the rate and mode by which water is transmitted to, and subsequently removed from, an evaporating surface. Initially evaporation is marked by high rates of moisture loss controlled by external atmospheric conditions; then, when a critical level of surface moisture content is reached, hydraulic continuity between the stone surface and subsurface is disrupted and the drying front recedes
beneath the surface, evaporation rates decrease and are controlled by the ability of the material to transport water vapour to the surface. Pore size distribution and connectivity, as well as other material properties, control the timing of each stage of evaporation and the nature of the transition.
These experimental data highlight the complexity of evaporation, demonstrating that different regions of the same stone can exhibit varying moisture dynamics during drying and that the rate and nature of evaporative loss differs under different environmental conditions. The results identify the importance of material-environment interactions during drying and that stone micro-environmental conditions cannot be inferred from ambient data alone.
These data have significance for understanding the spatial distribution of stone surface weathering-related morphologies in both the natural and built environments where mineralogical and/or structural heterogeneity creates differences in moisture flux and hence variable drying rates. Such differences may provide a clearer explanation for the initiation and subsequent development of complex weathering responses where areas of significant deterioration can be found alongside areas that exhibit little or no evidence surface breakdown.
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Temperature and moisture conditions are key drivers of stone weathering processes in both natural and built environments. Given their importance in the breakdown of stone, a detailed understanding of their temporal and spatial variability is central to understanding present-day weathering behaviour and for predicting how climate change may influence the nature and rates of future stone decay.
Subsurface temperature and moisture data are reported from quarry fresh Peakmoor Sandstone samples exposed during summer (June–July) and late autumn / early winter (October–December) in a mid-latitude, temperate maritime environment. These data demonstrate that the subsurface thermal response of sandstone comprises numerous short-term (minutes), low magnitude fluctuations superimposed upon larger-scale diurnal heating and cooling cycles with distinct aspect-related differences. The short-term fluctuations create conditions in the outer 5–10 mm of stone that are much more ‘energetic’ in comparison to the more subdued thermal cycling that occurs deeper within the sandstone samples.
Data show that moisture dynamics are equally complex with a near-surface region (5–10 mm) in which frequent moisture cycling takes place and this, combined with the thermal dynamism exhibited by the same region may have significant implications for the nature and rate of weathering activity. Data indicate that moisture input from rainfall, particularly when it is wind-driven, can travel deep into the stone where it can prolong the time of wetness. This most often occurs during wetter winter months when moisture input is high and evaporative loss is low but can happen at any time during the year when the hydraulic connection between near-surface and deeper regions of the stone is disrupted with subsequent loss of moisture from depth slowing as it becomes reliant on vapour diffusion alone.
These data illustrate the complexity of temperature and moisture conditions in sandstone exposed to the ‘moderate’ conditions of a temperate maritime environment. They highlight differences in thermal and moisture cycling between near-surface (5–10 mm) and deeper regions within the stone and contribute towards a better understanding of the development of structural and mineralogical heterogeneity between the stone surface and substrate.
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A second-season makeover at the 1964-1965 New York World's Fair. Hoping that "an interesting controversy" would revive the state of Minnesota's failing pavilion, Minnesota adds a large fiberglass Viking, longboat-styled snack bars, and the contested Kensington Runestone itself to its 'Brainpower Builds Profits' exhibit. [abstract adapted from Minnesota History 63/1]
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This publication constitutes the fruits of National Science Centre research projects (grant no 2011/01/M/HS3/02142 – 6 articles) and the National Programme for the Development of the Humanities (grant no 0108/NPH3/H12/82/2014 – 3 articles). We would like to acknowledge and at the same time express our sincere gratitude for the generosity shown by the following at the Adam Mickiewicz University in making this publication possible: the Dean of the Department of History, Institute of Pre-history and the Eastern Institute.
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Tämä tutkielma käsittelee Jeanette Wintersonin romaania The Stone Gods. Tutkielma käyttää keskeisenä teoreettisena kontekstinaan posthumanistisen ajattelua. Wintersonin romaani on science fictionia, se kuvaa erilaisia tulevaisuudenkuvia. Tutkielma ei tarkastele teosta ensisijaisesti tieteiskirjallisuutena, mutta hyödyntää alan tutkimuksen käsitteistöä, erityisesti Darko Suvinin novumin käsitettä teoksen narratiivisen fokuksen paikantamisessa. Teos käsittelee monipuolisesti ihmisyyttä ja ihmisen käsitettä suhteessa niin ei-inhimillisiin eläimiin kuin mekaanisiin entiteetteihin, robotteihin. Teos on vahvasti kriittinen erityisesti valistuksen ajattelua ja rationaalisen ihmissubjektin käsitteitä kohtaan. Tutkielma käsittelee teoksen kuvaamia maailmoja, niiden yhteiskuntia ja ajatusmaailmoja näistä näkökulmista. Keskeiseksi tutkimuskysymykseksi nousee ihmisyyden määrittelyn vaikeus ja kriittistä tarkastelua kestämättömät raja-aidat. Tutkielma toteaa, että teos maalaa kokonaisuudessaan varsin lohduttoman kuvan ihmiskunnan mahdollisuuksista selviytyä ja pitää kiinni elävästä ja hyvinvoivasta planeetasta, mikäli ajattelutapoihin ei tule merkittävää muutosta. The Stone Gods edustaa tieteiskirjallisuuden piirissä “Jos tämä kehitys jatkuu” -tarinoiden perinnettä. Vaikka teksti on paljon tämän päivän tieteen ulottumattomissa olevia tai jopa mahdottomia asioita, antaa teos välineitä myös tämän päivän ongelmien käsittelyyn.