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An Iron Age timber settlement which, in view of the defensive structures uncovered, is described as a lake fortress, on an island in Lake ārai?i, north-eastern Latvia, was excavated in 1965–69 and 1975–79 by teams led by Jānis Apals, who distinguished five construction phases. Dendrochronological analysis produced a c. 100-year floating chronology for Norway spruce (Picea abies (L.) Karst.) timbers from the earliest phase. A 14C wiggle-match was undertaken to obtain an absolute date range for the final year of the floating chronology, and thus for the construction of the settlement. Ten blocks of wood from one timber, each comprising 6-11 years and collectively spanning the whole 93-year tree-ring series, were dated by AMS. Using the IntCal13 calibration data, there is a 95% probability that the felling date of this timber falls in the range 775–784 cal AD. It appears, however, that the AD 775 spike in the atmospheric 14C level occurred within the 6-year span of the last sample. On this basis, we can narrow the date of construction to 776–780 cal AD. This date is significantly earlier than those reported in previous publications.  相似文献   
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Investment is an important decision for economic development, balanced growth and public welfare. There are many factors influencing investment. Thus, investment must be evaluated with multidimensional methods. Using taxonomy and principal component analysis this study attempts to determine appropriate investment areas in planned provinces in the Black Sea Region. Analyses were based on a number of demographic, economic, health, education, employment and cultural indicators. Results indicated that provinces were grouped into four clusters. Gümü?hane and Bayburt were determined to have the highest priority for investment in the manufacturing industry.  相似文献   
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A well-preserved assemblage of pottery and a broken stone artefact were excavated within a long house in the southern part of Tiszasziget, near the town of Szeged, Hungary. The settlement had been inhabited by the Late Neolithic Tisza culture around 5000–4500 BC. Based on the position of the finds it is suggested that the objects represent an ideologically-charged structured deposition. A piece of organic residue found in a mug (No. 18) with three-fold articulation has been subjected to macro- and microfloral analysis. After precise sampling of the residue, the standard methods to recover organic and inorganic plant remains were utilised. Based on the macrofloral and amino acid content analysis, it is suggested that the organic remains were pieces of fermented pastry made of cereal flour. The recovered silicified tissues and articulated phytoliths were subjected to morphometric measurements, which revealed that the food remain placed in the structured deposition was prepared of Triticum and – probably wild – Avena species. Starch granules of cereals were also detected, whilst the palynological evidence supports morphologies most likely to be related to the accompanying weed flora. The fortunate survival of the organic matter and the complex macro- and micro-archaeobotanical approach provided an unique opportunity to gain a better insight to the food preparation of Late Neolithic communities of the Carpathian Basin.  相似文献   
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A painted monolith, as important as the Aztec Calendar or the Coyolxauhqui, has been discovered in the ritual Aztec center of Mexico City. It represents Tlaltecuhtli, the bisexual manifestation of the Earth from whom all life comes. Still, pigments, which have lost their conglomerating resins, have to be retained. In this study, the consolidation of ochre pigment on original fragments from the Aztec sculpture is presented. Several compounds were tested as consolidants, on the one hand natural polysaccharides, Funori and Slobber of Nopal exudate, on the other derivatives of cellulose, Methocel® and Klucel®, and also commercial consolidants as KSE 300® and Paraloid B72®. To simulate the ageing of consolidated samples, they were treated in an Accelerated Weathering Tester. Then, both sets of samples, fresh and aged, were characterized structural, morphological and texturally by using X-ray diffraction, electronic microscopy and nitrogen adsorption, respectively. A leaching test was performed on consolidated samples to evaluate the consolidant efficiency.  相似文献   
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There are several dynamic factors that contribute to the reinforcement of the commercial relationships of Turkey. That is to say not only the strategic regional importance of Turkey, placed on the axis extending from the Far East to the Mediterranean side, Middle East and Europe, but also the new opportunities arising from the continuously developing relationships with the Balkan countries and the newly-established Turkish Republics, since the beginning of the 1990s, have been strengthening Turkey's commercial contacts. Istanbul has the communication networks and infrastructure required to develop into a regional centre. The major investments made in the communication sector during the 1980s have acted to develop the telecommunications infrastructure, thus supporting Istanbul's development into a regional communications centre. Today Istanbul has one of the world's most developed telecommunications infrastructures and this has given the city advantages in terms of expanding into international markets.  相似文献   
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In this paper, the film cluster in Turkey's cultural capital, Istanbul, is examined with the ultimate purpose of contributing towards a better understanding of the dynamics shaping the resilience and vulnerability of clusters. The paper seeks to shed light on the issue of how and why, in the face of a similar set of threats, Hollywood has proved so resilient but Istanbul's film cluster so vulnerable. Scrutinizing the emergence and the subsequent lock-in of the particular path followed by the Istanbul cluster and investigating the attributes of the proximate business environment that have been shaped along the way reveal that sustainability of a cluster seems to depend on three interrelated factors: how the cluster participants strategically respond to the upcoming threats, the structural capacity of the cluster to overcome such threats, and finally, the macro-socio-economic conditions (both at the national and global levels) against which the challenges occur and which mitigate or exacerbate them.  相似文献   
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During the long-lasting cultural sequences of the Shurābeh and Sialk archeological mounds (6200–550 BC) the inhabitants encountered numerous diversified crises along a narrow fertile passageway at the edge of the Central Iranian Plateau Great Desert. Some of the threats may be attributed to earthquakes, drastic climatic changes, and man-made environmental deterioration, which possibly led to the settlement withdrawing at different stages toward a more suitable location. Our study identified the occurrence of a large-magnitude earthquake around 3800 BC along the Kāshān fault, which is well-documented by various lines of circumstantial evidence, including: (i) numerous contemporaneous smashed skeletons and artifacts underneath collapsed walls and ceiling debris in several different areas; (ii) tilted and collapsed walls; (iii) nearly N–S oriented fallen large storage jars; and (iv) nearly vertical deep ground fractures cutting walls and floors of the Sialk III5 South Mound settlement. Archeological data also shows additional stratigraphic discontinuities and damages that may be attributed to earthquakes. However, damage features in limited exposed trenches are less conclusive and require additional careful excavations. Apparent ancient paleo-architectural innovative attempts to enhance the coherency/elasticity of the structures and minimize earthquake damage to buildings were also noted, suggesting the indigenous earthquake hazard mitigation endeavor. There seems to be a correlation between some site abandonment dates and possible drastic regional draught/cooling events. The natural and anthropogenic impacts addressed in this study constituted major threats to the sensitive archeological settlements at the fringe of the desert and the vicinity of the Kāshān active fault since antiquity.  相似文献   
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A long‐standing debate in archaeology concerns the sources of technological diversification among prehistoric hunter‐gatherers. This includes the study of the emergence and spread of pressure blade technology in Northern Europe during the Early Holocene. Until now, there has been little technological study of lithic collections from the East Baltic region, and our knowledge of the development and spread of this technology in the area is inadequate. This article presents for the first time a technological analysis of lithic assemblages from seven Early and Middle Mesolithic sites in the territory of present‐day Latvia, offering new possibilities for discussing pressure blade technology and research objectives connected with it. Furthermore, variation in elements of this technology is explored in relation to raw‐material characteristics through experimental flint knapping. Finally, the factors influencing diversity in craft traditions, as well as large‐scale communication and shifting spheres of interaction within Northern Europe during the Mesolithic, are discussed.  相似文献   
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