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Selection of an appropriate scale is an important decision in study design in many branches of science, since perceived patterns often change with the scales of spatial extent or resolution of an analysis. In previously published work, we created a resource selection model to determine the importance of several independent variables for the selection of lithic materials by hominins at a Middle Palaeolithic site in southern France. Two of these independent variables (calories exerted and difficulty of the terrain covered in travel from source to site) were calculated using elevation data extracted from maps. In the present paper, we examine the differences in model performance when the variables ‘Calories’ and ‘Difficulty’ are calculated using 1) three base maps for elevation that differed in map resolution (from finest to coarsest: a 1:25,000 topographic base map, SPOT DEM, and SRTM DEM), and 2) two different methods for determining the route from source to site (straight-line route and least-cost route; both methods exclude areas with slopes >60% from travel). Our best model was the one that used data calculated using the topographic base map; however, the SRTM DEM-based data produced models of essentially equal quality. Regardless of map scale, models that used data calculated using a straight-line route always outperformed models that used data calculated using a least-cost route. This supports our previous finding that a straight-line route is a more appropriate measure for the path from lithic source to site than a least-cost route. We conclude that the map resolution of each of the base maps used here is appropriate for analyses involving spatial data pertaining to Neandertal activity because this type of data is essentially always coarse-grained. 相似文献
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Gemma Leone Alessandra De Vita Marco Consumi Gabriella Tamasi Claudia Bonechi Alessandro Donati 《Conservation and Management of Archaeological Sites》2013,15(2):92-112
ABSTRACTThis paper aims to evaluate mineralogical, elemental, and thermal differences among original Roman joint mortars and those used in twentieth-century restoration campaigns taken from different areas at the Herculaneum archaeological site. The purpose is to improve the compatibility of restoration mortars. Roman and modern mortars were studied with petrography, thermal analysis and x-ray fluorescence investigations. The results indicate significant differences between the Roman and modern mortars which could facilitate the degradation process. Roman mortars, in particular, were composed of a coarser aggregate which was present in a lower ratio with binder in comparison with modern mortars. 相似文献
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Roland Sarti Guido Ruggiero Adanella Bianchi Geoffrey Symcox Lucy Riall Mary Gibson 《Journal of Modern Italian Studies》2013,18(3):449-485
Luciano Guerci and Giuseppe Ricuperati (eds) 1998 Il coraggio della ragione. Franco Venturi intellettuale e storico cosmopolita (Atti del Convegno internazionale di studi promosso da Fondazione Luigi Einaudi, Università degli Studi di Torino, Accademia delle Scienze, Deputazione Subalpina di Storia Patria, Torino, 12–14 dicembre 1996) (Turin: Fondazione Luigi Einaudi), pp. 1–497, ISBN 88–430–1129–4. Stefano Levati ( 1997) La nobiltà del lavoro. Negozianti e banchieri a Milano tra Ancien Regime e Restaurazione (Milan: Franco Angeli), pp. 1–320, 40,000 lire. Guido Formigoni (1998) L'Italia dei cattolici: Fede e nazione dal Risorgimento alla Repubblica (Bologna: Il Mulino), pp. 1–176, 22,000 lire, ISBN 88–15–06314–5 paperback. Albert Schram ( 1997) Railways and the Formation of the Italian State in the Nineteenth Century, ’Cambridge Studies in Italian History and Culture’ (Cambridge: Cambridge University Press), pp. 1–164, Bibliography and Index, $59.95, ISBN 0–521–57159–6 hardback. Catherine Brice (1989) Monumentanté publique et politique à Rome. Le Vittoriano (Rome: École Française de Rome), pp. 1–439. Hans Woller ( 1997) I conti con il fascismo: L'epurazione in Italia 1943–1948 (Bologna: Il Mulino), pp. 1–603, 50,000 lire, ISBN 88–15–06198–3 paperback. Maria Stone ( 1998) The Patron State: Culture and Politics in Fascist Italy (Princeton, NJ: Princeton University Press), pp. 1–334, ISBN 0–691–05999–3 paperback. Angelo Ventrone (1996) La cittadinanza repubblicana. Forma‐partito e identità nazionale alle origini della democrazia italiana (1943–1948) (Bologna: Il Mulino), pp. 1–305, 38,000 lire, ISBN 88–15–05508–8 paperback. R. J. B. Bosworth and Patrizia Dogliani (eds) (1999) kalian Fascism: History, Memory and Representation (Houndmills and New York: Macmillan/St Martin's Press), pp. 1–245, ISBN 0–312–21717. Ernesto Galli della Loggia (1998) L'identità italiana (Bologna: Il Mulino), pp. 1–171, 18,000 lire, ISBN 88–15–066 12–8 paperback. Aldino Monti (1998) I braccianti (Bologna: Il Mulino), pp. 1–161, 18,000 lire, ISBN 88–15–06582–2 paperback. Giuliana Gemelli (ed.) (1998) Scuole di management Orìgini e primi sviluppi delle business schools in Italia (Bologna: Il Mulino), pp. 1–543, ISBN 88–15–06297–1 paperback. Valeria Fargion (1997) Geografia della cittadinanza sociale in Italia (Bologna: Il Mulino), pp. 1–351, 42,000 lire, ISBN 88–15–06127–4 paperback. Umberto Gentiloni Silveri (1998) L'Italia e la nuova frontiera: Stati Uniti e centrosinistra 1958–1965 (Bologna: Il Mulino), pp. 1–343, 45,000 lire, ISBN 88–15–06282–3 paperback. 相似文献
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Lucy Bland 《Gender & history》2005,17(1):29-61
This article examines miscegenation fears in Britain in the period after World War I, noting three dominant discourses: that miscegenation leads inevitably to violence between white and black men (focusing on the 1919 race riots), that these relationships involve sexual immorality (analysing the 1920 ‘Black Horror on the Rhine’, a case involving a white woman, a Chinese man and drugs and a trial of a white woman for killing her Egyptian husband) and that miscegenation has ‘disastrous’ procreative consequences. It is suggested that miscegenation stood as one British boundary marker, separating the nationally acceptable and the nationally threatening. The parties concerned – the ‘primitive’ man of colour, the white woman of a ‘low type’ and the ‘misfit’ offspring – were each pathologised in terms of their deviant sexuality. Yet interracial relationships did not decrease, quite the contrary. The move in Britain towards a more racially mixed community began in the years after the Great War, when certain white women made choices against the norms of respectable femininity. 相似文献
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Lucy Grig 《Early Medieval Europe》2002,11(4):321-336
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