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1.
Research projects undertaken in the Cantabrian region since 1980 have produced new, high-quality information about the neolithisation process(es) in this area. It is now necessary to review this archaeological information and test the main hypotheses put forward to explain it. This paper presents an update on the archaeological evidence (sites, chronological dates, archaeozoological, archaeobotanical and technological information) for the early Neolithic in the Cantabrian region. It summarizes recent research on neolithisation in the region, and assesses the impact of this process during the early Neolithic, and its later consolidation. Although the available information is still incomplete, it is now possible to identify the focal point of the introduction of elements characteristic of the Neolithic way of life in the region. Current evidence suggests that it is in the eastern sector, where the earliest arrival of domesticates and new technologies such as pottery has been attested. The existence of continuities—such as sustained reliance on hunting and gathering and the coexistence of old and new funerary rites—suggests the persistence of native populations, which gradually participated in the neolithisation process after an ‘availability phase’.  相似文献   
2.
Despite phytoliths having been used to understand past human use of plants and palaeoenvironment in Middle Paleolithic sites, little is known on this aspect in the well-documented central region of Mediterranean Iberia. This paper presents the first phytolith and mineralogical study conducted at Abrigo de la Quebrada (Chelva, Valencia). Forty-one samples were analyzed through phytoliths and Fourier transform infrared spectroscopy (FTIR) from different areas, stratigraphic levels, and archeological contexts (hearth, hearth-related, and non-hearth-related sediments) of the shelter. The results obtained point towards a different pattern of preservation in the site depending firstly on the stratigraphy and secondly on the area where the samples were collected. Postdepositional processes that may have chemically affected phytolith preservation are discussed. Grasses are the main plant component identified in all the samples while woody plants are scarce. The abundance of grasses in the non-hearth-related sediments might be related, at least partially, to the dispersion of ashes from hearths, as indicated by the FTIR results. The results are indicative of an occupation of the site during the spring-autumn season. At this time, the area would be dominated by a semi-open environment with supramediterranean vegetation.  相似文献   
3.
ABSTRACT It has long been recognized that the forces that lead to the agglomeration of economic activity and to aggregate growth are similar. Unfortunately, few formal frameworks have been advanced to explore this link. We critically discuss the literature and present a simple framework that can circumvent some of the main obstacles we identify. We discuss the main characteristics of an equilibrium allocation in this dynamic spatial framework, present a numerical example to illustrate the forces at work, and provide some supporting empirical evidence.  相似文献   
4.
The exploitation of marine resources in Prehistory has traditionally been regarded as insignificant, at least until the late Upper Pleistocene. However, in recent years the systematic study of archaeofaunal remains with a marine origin has widened our knowledge of the role they played among groups of hunter–gatherers in Europe. This paper analyses the available data about the evidence for the exploitation of the different marine resources (molluscs, birds, mammals, crustaceans, echinoderms and fish) that have been recorded at archaeological sites in Cantabrian Spain in the late Pleistocene and early Holocene.With the information currently available, it is clear that although it is in the Mesolithic when archaeozoological remains with a marine origin are found most often, the exploitation of these resources in the region began in the Early Upper Palaeolithic.  相似文献   
5.
We use the case of Chile to analyze the effectiveness of a spatially blind employment relief program (hereafter referred to as the LPE program) established by the Chilean government and implemented during the COVID-19 pandemic. Chile is an interesting case because on the one hand its nonpharmaceutical interventions were spatially driven by health indicators based on small geographical areas; hence, producing sizeable regional and temporal variation of the local conditions induced by the COVID-19 pandemic. On the other hand, the LPE program was designed and implemented nationally without distinction of local labor market or pandemic conditions, and each firm could decide whether to enroll in the program. By exploiting the spatial-temporal variation of exogenously imposed lockdowns and using a difference-in-differences panel data framework, we find that the LPE program was only effective for a group of regions in the country but, more importantly, that the LPE program was less effective during lockdowns. Moreover, the requirements of the LPE program were vague and did not target specific populations or entities. Consequently, our results suggest that women, informal and small firm workers, and most economic sectors throughout the country were less able to take advantage of the benefits of this program.  相似文献   
6.
Taphonomic studies of faunal assemblages from archaeological and palaeontological sites need biostratinomy research to endorse their results. Many papers have studied the relationship between the differential conservation of anatomical parts and the animal responsible for the deposits. In this paper, we present the biostratinomy results from 18 Cervus elaphus hispanicus carcasses (Hilzheimer 1909) in a Mediterranean ecosystem (the Sierra Norte Mountains in Seville Natural Park). We also describe the skeleton decay related to scavenger community, where Sus scrofa (Linnaeus, 1758) is maybe the most important bone scavenger in our study area. These results of this research were compared to those obtained from a similar study carried out in Doñana National Park (Huelva) and confirmed that post-mortem tendencies are similar in both ecosystems.  相似文献   
7.
Studies of open school policies predict house prices to rise in areas that gain access to high-quality schools. However, excess demand may limit access to high-quality schools. We take advantage of changes in Chicago's schools’ admissions policies to test whether a higher probability of admission to magnet schools for students living within 1.5 miles leads to higher house prices. Results indicate that the 1997 and 2009 reforms increased house prices for homes within the 1.5 mile radius by about 4% and 12.6%, respectively. The higher probability of admission for black students after a consent decree was vacated in 2009 led to a significant increase in prices in predominantly African-American areas on the south side.  相似文献   
8.
9.
The exploitation of lithic resources was an important aspect of prehistoric resource exploitation strategies and adaptation. Research has mostly focused on technological and spatial aspects of lithic factory sites, often overlooking how these sites were integrated within local socioecological dynamics in terms of food acquisition and consumption. The aim of this paper is to study plant consumption at Datrana, a 5000-year-old lithic blade workshop in North Gujarat, India, in order to understand its occupants’ subsistence strategies. The results of archaeobotanical, mineralogical and soil pH analyses show that the occupants of this factory site were consuming local crops but not processing them, suggesting that either (a) food was being processed in other areas of the site or (b) it was acquired in a ‘ready-to-consume’ state from local food-producing communities. This study highlights the integration of a lithic factory site within its surrounding cultural and natural landscape, offering an example of how the inhabitants of a workshop interacted with local communities to acquire food resources.  相似文献   
10.
Seismic soil pressures developed on a 7 m rigid retaining wall fixed to the bedrock are investigated using a finite element model that engages nonlinear soil intended materials available in OpenSees. This allows incorporation of the inelastic behavior of the soil and wave propagation effects in the soil-wall system seismic response. The nonlinear response of the soil was validated using the well-stablished, frequency-domain, linear-equivalent approach. An incremental dynamic analysis was implemented to comprehensively examine the effect of soil nonlinearity and input motion on the induced seismic pressures and to evaluate current code equations/methodologies at different levels of earthquake intensity. The results show that soil nonlinearity and seismic wave amplification may play an important role in the response of the soil-wall system. Therefore, methodologies that rely only on peak ground acceleration may introduce large bias on the estimated seismic pressures in scenarios where high nonlinearity and site amplification are expected.  相似文献   
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