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61.
Anne-Marie Tillier Israel Kaffe Baruch Arensburg Mario Chech 《International Journal of Osteoarchaeology》1998,8(1):1-6
The analysis of the maxillae and mandible belonging to a Middle Palaeolithic child has provided evidence of the early appearance of a developmental dental anomaly among Homo sapiens. The material came from the Near Eastern site of Qafzeh. In the mandible there was agenesis of the left second premolar and congenital absence of the right could not be totally excluded. Additional analyses including two presumed cases of dental development anomalies within contemporaneous prehistoric populations showed that tooth agenesis also can affect the anterior region of the mandible, and could be clearly separated from ante-mortem tooth loss caused by trauma. © 1998 John Wiley & Sons, Ltd. 相似文献
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On the Performance of the Subtour Elimination Constraints Approach for the p‐Regions Problem: A Computational Study 下载免费PDF全文
Juan Carlos Duque Mario C. Vélez‐Gallego Laura Catalina Echeverri 《Geographical analysis》2018,50(1):32-52
The p‐regions is a mixed integer programming (MIP) model for the exhaustive clustering of a set of n geographic areas into p spatially contiguous regions while minimizing measures of intraregional heterogeneity. This is an NP‐hard problem that requires a constant research of strategies to increase the size of instances that can be solved using exact optimization techniques. In this article, we explore the benefits of an iterative process that begins by solving the relaxed version of the p‐regions that removes the constraints that guarantee the spatial contiguity of the regions. Then, additional constraints are incorporated iteratively to solve spatial discontinuities in the regions. In particular we explore the relationship between the level of spatial autocorrelation of the aggregation variable and the benefits obtained from this iterative process. The results show that high levels of spatial autocorrelation reduce computational times because the spatial patterns tend to create spatially contiguous regions. However, we found that the greatest benefits are obtained in two situations: (1) when ; and (2) when the parameter p is close to the number of clusters in the spatial pattern of the aggregation variable. 相似文献
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Mario Draper 《国际历史评论》2013,35(6):1216-1234
AbstractWhile historians have consistently focused on the development of German, French, and British planning in the years preceding the Great War, few have truly acknowledged neutral Belgium’s role in defining the strategic paradigm of 1914. Belgium held the strategic key to the opening salvos of a future Franco-German war, and each of its Guarantors were determined to obtain the initiative. While German planners were prepared to seize it by force, the Entente (particularly Britain), remained wary of its obligations. Instead, Britain sought to determine Belgian intentions and capabilities through secret and unbinding staff conversations in 1906 and 1912. The former proved useful in establishing a framework for co-operation but ultimately came to nothing. By the time they were resumed in 1912, Anglo-Belgian diplomatic relations had soured, while Belgium’s military reforms and its emergence as a colonial power gave it a renewed sense of confidence. Belgian officials were determined to retain the kingdom’s agency in the formulation of its defence policy and resented Entente suggestions of pre-emptive action. Neutrality was subordinated to independence, which itself could not be guaranteed were Belgium to conclude even the loosest of military accords. Consequently, Entente plans were forced surrender the strategic initiative to the Germans. 相似文献
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Mario D. Zamora 《Reviews in Anthropology》2013,42(3):378-380
William G. Davis. Social Relations in a Philippine Market: Self‐interest and Subjectivity. Berkeley and Los Angeles: University of California Press, 1973. xiii + 315 pp. Appendixes, bibliography and index. $12.50. 相似文献
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Angelo D'Ambrisi Mario De Stefano Marco Tanganelli 《Journal of Earthquake Engineering》2013,17(8):1089-1100
Structural irregularity undermines capability of conventional methods for 2D pushover analysis to closely approximate results from inelastic dynamic analysis. In recent years, different methods have been developed to overcome such limitation and their suitability has been checked with reference either to idealized building models or to geometrically simple tested structures. In this paper, suitability of one such method, proposed by Fajfar et al. [2005], is evaluated considering an existing school building which presents both vertical and plan irregularities. Types of irregularity encompass not only those usually considered by seismic codes but also those deriving from a bad conceptual design and construction inaccuracies, very frequent at the year of construction (1974). It is found that, even under such complex irregularity conditions, this ‘modified’ pushover analysis correlates well results from inelastic dynamic analysis almost up to failure, since, in most cases, its predictions of interstorey drifts and plastic rotations are conservatively close to values from inelastic dynamic analysis. Even failure mechanism, consisting of a floor mechanism at the third level, is correctly predicted, thus demonstrating adequacy of such method for actual framed structures. 相似文献
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Mario Fagone Tommaso Rotunno Silvia Briccoli Bati 《International Journal of Architectural Heritage》2016,10(7):903-918
The St. John Hospital is part of a larger complex of buildings known as the Hospitallers Quarter, located south of the Holy Sepulchre in Jerusalem. At present, the hospital looks like an irregular volume both in height and in plan; it is covered by ten groin vaults resting on very stocky pillars. Each vault is formed by intersecting double curvature surfaces. In order to verify the effectiveness of continuous carbon fiber reinforced polymer sheets reinforcement, bonded at the extrados of vaults, laboratory tests were carried out on a 1:5 scale model, built with materials and construction techniques similar to those of the real building. Experimental tests were performed on the unstrengthened and strengthened vault. The experimental results shown that the strengthening system is able to increase the collapse load of the vault, without substantial variation of the initial stiffness. 相似文献
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Network Dynamics in Natural Resource Governance: A Case Study of Swiss Landscape Management 下载免费PDF全文
Structural characteristics of social networks have been recognized as important factors of effective natural resource governance. However, network analyses of natural resource governance most often remain static, even though governance is an inherently dynamic process. In this article, we investigate the evolution of a social network of organizational actors involved in the governance of natural resources in a regional nature park project in Switzerland. We ask how the maturation of a governance network affects bonding social capital and centralization in the network. Applying separable temporal exponential random graph modeling (STERGM), we test two hypotheses based on the risk hypothesis by Berardo and Scholz (2010) in a longitudinal setting. Results show that network dynamics clearly follow the expected trend toward generating bonding social capital but do not imply a shift toward less hierarchical and more decentralized structures over time. We investigate how these structural processes may contribute to network effectiveness over time. 相似文献
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Mario?CastellanaEmail author 《Revue de synthèse / Centre international de synthèse》2005,126(2):303-316
The development and complexity of the debate about the conceptual structure of science in the XXth century gave birth to a new discipline, the history of epistemology, with the aim of giving a critical history of our «epistemological heritage» with suitable methodologies of a historical and theoretical nature. A critical history of the philosophy of science on more «Wenden», besides the neo-positivistic and post-neo-positivistic ones; in Italy and France, in the first period of the XXth century, developed a tradition of epistemological research in a neo-rationalistic sense with specific theoretical characteristics, particularly for the relevance assigned to the historicity of science. The Italian-French epistemology favored the study of the relationship between mathematical and physical thought, such as can be characterized as a really autonomous physical-mathematical epistemology; this different historical and epistemological approach, first elaborate by Federigo Enriques and then by Gaston Bachelard, Albert Lautman and Ferdinand Gonseth, allowed us to understand in the 30's the «implicit philosophy» in the works of Kurt Gödel and Hermann Weyl. 相似文献