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A vertebra of a Brown Bear (Ursus arctos) is described from the Mesolithic settlement Star Carr. This is the first record of the species from the site. The presence of Brown Bear in a Preboreal/Boreal deposit is an important addition to the early Mesolithic fauna of Britain. A comparison with contemporary Danish material shows that the bone from Star Carr falls within the wide size range of the Danish subfossil Brown Bear. In Denmark the species decreases in number from Boreal to Atlantic time, and finds are extremely scarce in Britain during the same time interval. This is probably due to the major eustatic sea level rise, which isolated Britain and Sjælland, preventing new immigration, and to vegetational changes restricting the preferred habitats of the Brown Bear.  相似文献   
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珍珠门文化初探   总被引:7,自引:1,他引:6  
刘延常 《华夏考古》2001,(4):94-105
目前,海岱地区的考古学文化序列已基本清楚。学术界一般认为,北辛文化、大汶口文化、龙山文化和岳石文化属一脉相承的一个文化系统,是东夷族团创造的。岳石文化之后的商代考古学文化,现已区分为商文化和上著文化两大系统,同时还有二者融合产生的地方文化。商文化主要是商人灭夏后逐渐东扩形成的,而土著文化则是继承了岳石文化,为东夷人创造。有学者根据发现的考古资料提出了珍珠门文化①的命名,以此代表胶东半岛商代夷人的文化。 通过考古工作者十余年的努力,发现了较多的与珍珠门遗存相类似的文化遗存,其分布范围和文化特征逐渐…  相似文献   
3.
Wezmeh Cave is located on the northeastern edge of the Islamabad plain, a high intermontane valley in the western‐central Zagros. In 1999 a disturbed but large faunal assemblage was recovered from this site. The abundant and extremely diverse faunal spectra present at Wezmeh Cave has highlighted the importance of this assemblage. Carnivore remains constitute the bulk of the assemblage; red fox (Vulpes vulpes) has the highest number of identified specimens followed by spotted hyena (Crocuta crocuta), brown bear (Ursus arctos), wolf (Canis lupus), felids (lion, leopard, lynx/caracal and wildcat), mustelids (badger, polecat, marten) and viverrids (mongoose). Artiodactyls (bovid, cervid, suid), equids, rhinoceros (Dicerorhinus sp.) and small animals (Cape hare, porcupine, tortoise, snake, birds) are also present. According to U‐series dating, the site was occupied from around 70 ka BP through to sub‐recent periods by carnivores. Amongst this rich assemblage, a human fossil tooth was also found and dated by non‐invasive spectrometry gamma dating to 20–25 ka BP. A preliminary zooarchaeological and taphonomic study shows that Wezmeh Cave was used by multiple carnivore species, a unique phenomenon in the Zagros Mountains in particular and southwest Asia in general. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   
4.
Robin Cook argued that New Labour’s foreign policy would have ‘ethical dimensions’,(Cook, “Robin Cook’s Speech on the Government’s Ethical Foreign Policy.”) and an assumption is often made, within existing literature, that this is an accurate statement when considering the overseas development agenda of New Labour government’s between 1997 and 2010. Tingley argues that the more left-wing a party, the more likely they are to increase attention on, and funding of, overseas development aid (ODA) projects.(Tingley, “Donors and Domestic Politics.”) This article uses the New Labour governments, from 1997 to 2010, as a case study to test the argument of Tingley and determines that his conclusions are accurate in the case of the UK. This article will then argue, using the work of Breuning that the motivations of the New Labour governments, and the way they conveyed their policy to the electorate changed overtime rather than remaining morally focused for the duration of their time in power.(Breuning, “Words and Deeds.”) By focusing on the rhetoric of the Labour Party, the changes in motivation can be identified in the period 1997–2010, with a distinct move from moral justifications to more self-interested pragmatic reasoning, which confirms Breuning’s argument.  相似文献   
5.
木雕文物的褐腐菌害   总被引:1,自引:0,他引:1  
为对一尊唐代木雕佛像严重朽蚀的原因进行调查,用扫描电镜观察,对样品的综纤维素、木质素含量等进行分析测定,并对菌进行培养。实验结果表明,木材纤维中有菌丝,真菌孢子,经一定温湿度培养后,腐朽木材上的孢子有发展,说明该真菌在原介质上存活,在合适的环境条件下,将会继续起菌害作用。分析数据说明,综纤维素含量大大降低,木质素的相对百分比含量大大升高,这是综纤维素及其相伴生的戊聚糖受真菌破坏分解的结果。此等菌害的表现应该是属褐腐菌对木材破坏的结果。由于褐腐菌对木材短时间内就能产生强大的破坏力,因此,对木质物的保护要特别重视褐腐菌的侵害。  相似文献   
6.
Many sixteenth- to eighteenth-century shipwrecks have been found after land reclamation in parts of the former Zuiderzee, one of the busiest waterways in Dutch history. After the land fell dry, some shipwrecks were excavated, destroyed, reburied, or covered with sand or clay. In the late 1970s a method was developed to mitigate degradation processes of some of the wrecks remaining in good condition by wrapping them in plastic foil. The idea was that the plastic would prevent evaporation and lateral subsurface flow. Wet conditions prevent decomposing of wood by especially soft rot fungi. Oxygen will be rapidly depleted by decomposition of organic matter.

Recent monitoring of wrapped shipwrecks has shown that this method of preventing rot worked exceptionally well. We adapted wrapping using new technology nowadays applied for sealing tunnels and landfills. We will present the implementation requirements, materials and new adapted method for wrapping shipwrecks.  相似文献   
7.
天一阁藏书保护经验谈   总被引:2,自引:0,他引:2  
天一阁经历了430余年的风雨考验,至今藏书丰富,但破损严重。调查结果证实,书虫确是直接危害害古籍的最大杀手,在现有条件下,手工除虫和日常养护结合是一种切实可行的保护措施。  相似文献   
8.
The recent development of portable, battery-charged x-ray tubes and digital detectors has made digital radioscopic examination of wooden buildings a realistic option. Lack of experience with the often very complex radiographs of building structures makes the interpretation of such radiographs difficult. A set of radiographs of wood in different, identified conditions was established for use when interpreting radiographs of wood in unknown condition.

This article presents radiographs of a trestle-framed building. The recordings were done in areas where the condition of the wooden elements was known in advance, either on the basis of dendrochronological drill samples or because the building element had been replaced recently and the wood was sound. The radiographs were compared with NIKU´s collected guideline radiographs and discussed with respect to the information they provide about the wood’s condition. Finally, we discuss radioscopy as a supplement to traditional methods of building surveying.

The authors took all of the photos and radiographs (©NIKU). The radiographs are shown as “shadow” images—materials of higher density are seen lighter than materials of less density, as long as they are of same thickness.  相似文献   

9.
Actualism has been a fundamental tool in taphonomy. The knowledge of accumulation patterning of modern faunal allows us to interpret the activity of different actors in the archaeological record and to reconstruct the behaviour of preterit animals and humans in which we are interested. However, until now, there are few works that include bone modifications made by bears amongst those made by carnivores. Most data about bone modifications made by bears have been obtained from the archaeo‐palaeontological record. In most of these assemblages, the presence of bears is related to their period of hibernation. Therefore, in these contexts, the changes documented on recovered bear bones are associated only with cannibalism. In this paper, we present an actualistic study about modifications on bones made by modern brown bears. These animals can cause damage similar to those produced by other large carnivores. Generally, bear activity leaves slight damage, mainly on large‐sized animal bones. However, on bones of small‐sized animals and those of greater fragility, the bears can produce abundant damage. Though not usual, bears can break long bones and consume the complete epiphysis. This study suggests that bears have the potential to be agents of bone modification in fossil assemblages. Consequently, they should be considered as a possible agent of modification of faunal remains in the fossil record. Copyright © 2011 John Wiley & Sons, Ltd.  相似文献   
10.
A critical re-examination is undertaken of a model for soil development which has been put forward to explain the occurrence of buried sols lessivés (Argillic brown earths) under several neolithic earthworks in southern England. The model attributes the formation of sols lessivés to neolithic agricultural activity, and is based on the assumption that lessivage will not occur under woodland, but will be facilitated by clearance and cultivation. A review of the pedological literature shows both these assumptions to be unsubstantiated, and a survey of the sites used in the development of the model reveals that at only one is there any independent evidence for neolithic agriculture. An alternative hypothesis for sol lessivé development is put forward which associates it with the post-glacial forest. The original model was taken as an environmental cause of the change in the neolithic economic base. In view of the arguments presented here this explanation is no longer tenable.  相似文献   
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