SEGMENTAL CROSS-SPECTRUM AS A NEW TECHNIQUE IN SITE RESPONSE ESTIMATION USING SPECTRAL RATIO ANALYSIS

Different aspects of spectral analysis for site response evaluation are investigated in this study. The segmental cross-spectrum is proposed in spectral analysis of earthquake ground motions. The performance of segmental cross-spectrum in contrast with the conventional methods is investigated through the mathematical modelling, numerical analysis and application to earthquake data recorded at Chiba and Shinfuji downhole arrays in Japan. In analysis of earthquake data, the soil amplification function is identified using both uphole/downhole (U/D) and H/V spectral ratios. The advantage of seg-mental cross-spectrum is assessed by comparing identified amplification functions using different spectral methods and theoretical soil response. The reliability of site response estimations obtained by H/V spectral ratio using segmental cross- and Fourier spectra is also examined by means of cross-validation with the U/D spectral ratio of earthquake motion and theoretical soil response. Furthermore, the application of segmental cross-spectrum in nonlinear soil response is examined by comparing the amplification function of weak and strong motions for both methods. The results validate the advantage of segmental cross-spectrum in both linear and nonlinear soil response, particularly, when it used with H/V technique.     

田螺山遗址古菱角埋藏环境调查与保护对策的初步研究

本文运用多种化学分析方法分析了浙江省田螺山遗址的地层土壤和地下水环境,得出了不同地层中主要元素的分布规律：再对古菱角外壳遗存和现代菱角外壳进行扫描电镜和元素分析,总结古菱角经长期埋藏后,外壳结构和化学元素的变化规律：最后初步探索古菱角类植物遗存的科技保护时策。     

南方潮湿地区考古遗址迁移保护初探——以长沙国际金融中心建设工地考古遗址迁移保护工程为例

长沙国际金融中心建设工地考古遗址迁移保护工程是大遗址保护实践的有益探索,也是目前遗址保护与区域经济建设协同发展模式下较具现实意义和操作性的一种大型遗址保护途径。本次迁移保护工程是湖南地区首次遗址类不可移动文物大规模迁移保护,采用"表面加固"、"分段整体切割"、"探铲打孔底板嵌套插入隔断"、"聚氨酯发泡固型"四个步骤,对各类型遗存进行科学、完整的迁移保护,该技术在长沙首次成功运用,解决了潮湿土遗址迁移保护的饱水环境、遗址基层不稳定、安全施工等技术难题。希望为南方潮湿地区遗址、墓葬的整体迁移保护提供有益的借鉴。     

潮湿环境下土遗址加固保护材料筛选研究——以福建昙石山遗址为例

长期以来,由于土遗址保存环境的复杂性和特殊性,潮湿环境下的土遗址保护一直是困扰我国文物保护和考古界的难点,至今尚没有成熟的规范可以参考.福建省昙石山遗址作为我国东南沿海地区典型潮湿环境下的土遗址,近年来在遗址加固保护过程中,通过大量室内和现场试验,在适用材料的筛选研究等方面取得了一定经验和成效,是对我国潮湿环境下土遗址保护工作的一次有益尝试和探索.     

Do Richer Media Mean Better Learning? A Framework for Evaluating Learning Experiences in Museum Web Site Design

Museums and other cultural and heritage institutions have important roles to play in both formal and informal education. This paper argues that, while museum Web sites tend to showcase increasingly sophisticated multimedia content, rich multimedia do not necessarily mean better learning design and that, in the absence of actual learner performance data, it is necessary to look beyond the types of media used and consider the kinds of learning outcomes implied or explicit in order to assess the learning effectiveness of the design. Using models and theories from education, the paper analyses two sites and discusses how these models can be applied to create learning experiences that go beyond simple comprehension and recall of information.     

Distinctive Places, Suitable Spaces: Conceptualizing Mobile Group Occupational Duration and Landscape Use

While extreme mobility and ensconced sedentism can be easily distinguished in the archeological record, effective means are lacking of discriminating between degrees of mobility that may range from seasonal shifts by farmers to recurrent moves across the landscape as a way of life. Fortunately, site layout and the way space is used are related to expectations regarding length of stay, and though they are not quantifiable measures, they provide linkages between the active and material realms. Short stays elicit a search for distinctive characteristics of a place rather than investing in the modification of a place. The quest for suitable spaces is a matter of fact among mobile groups, whereas sedentary groups, or those expecting to stay in one place for an extended period, tend to build their environment to suit their needs, even formalizing spaces in consistent ways from place to place. By understanding the ramifications of these concepts it is possible to distinguish between differing degrees of mobility of groups occupying similar environmental zones in the southern portion of the American Southwest in the protohistoric and early historic periods and to apply these to wider contexts.     

江苏丹阳葛城遗址勘探试掘简报

江苏丹阳葛城吴文化遗址,经勘探试掘,确认其为一座吴国城址.城址内分布有窖穴、房基、水井、水沟,城址外分布有土墩墓.遗址中出土有较丰富的陶器、石器、青铜器等吴文化遗物.通过对出土陶器分析,可将该文化遗存分为三期:早期为西周中晚期,中期为春秋前期,晚期为春秋后期,三者之间连续无缺环.经与江、浙、皖地区同类吴文化遗存对比,可推知丹阳葛城古城是目前所发现的最早、延续使用时间最长、保存状况较为完好的吴国城址.     

周原遗址西周墓葬出土芦苇编织物的材料鉴定及用途研究

西周时期墓葬中有机质的葬具通常保存情况极为不佳,考古学信息不甚明确,因而墓葬研究中往往无法充分利用此类材料,但此类材料具有潜在的考古学研究价值。本研究以2017年度周原遗址齐镇发掘区墓葬内所出严重降解的织物为材料,利用显微技术观察残余的表皮细胞和植硅体形态,鉴定结果表明墓葬内所出织物为芦苇(Phragmites communis),符合先秦文献中对殓席的记载,主要根据《士丧礼》和《既夕礼》两篇内容,梳理了芦苇编织物在丧葬过程中的用法和可能的出土位置,以此进一步判断出土苇席的性质主要为卧席和抗席。     

The devolution of mudbrick: ethnoarchaeology of abandoned earthen dwellings in the Bolivian Andes

This ethno-geoarchaeological study considers the formation of archaeological deposits through a study of abandoned contemporary mudbrick structures on the Taraco Peninsula, Bolivia. The study site was a domestic compound with rooms for different functions that had been abandoned for over 50 years. Structures were in variable states of decay in terms of roof cover, walling integrity and abandonment fills. Geoarchaeological samples were collected from intact and weathered adobes, earthen hearths, mud plaster, and flooring. Adobes and mud plaster were locally derived from topsoil containing archaeological sediments with added gravel and plant temper. This study found a relatively light anthropogenic signature for decayed earthen houses.Rising damp exfoliated mud plaster despite un-mortared cobble wall foundations. Organic matter from roof fall attracted thriving soil faunal populations, which furthered site destruction through bioturbation, particularly packed earth floors. Sediments derived from weathered mudbrick retained little evidence of prior use as construction materials unless exposed to heat. Sediments exposed to high-temperatures produced the most distinctive rubified features but were structurally compromised. Isolated thermal features from decomposed adobe would not be distinguishable from other hearth types. Adobes exposed to low or moderate heat had few distinctive features in thin section. Intact adobes and floors that were not exposed to heat have fewer pores than natural sediments and distinctive grass inclusions. These adobes disarticulated into loose sediments when exposed to weathering. Adobe fall outside the crumbling structures blended into topsoil.This study sheds light on functional attributes of pre-Columbian construction practices. Thick, fine-textured sterile flooring is commonly encountered in the study region. This would control bioturbation from roof fall in a previous occupation enabling reconstruction in abandoned dwellings. In contrast to the contemporary dwelling, prehistoric mortared cobble foundations would resist rising damp. Cobbles without mortar may relate more to design and construction than durability. These contrasts between contemporary and prehistory construction practices reflect differences in the design, construction costs and functional use-life of adobe structures.     

湖北枣阳市九连墩楚墓青铜器的材料学特征研究

前言湖北省随州、枣阳一带古称随枣走廊,是联系我国中原、西北与南方的交通要道,地下文物十分丰富,曾因云梦睡虎地秦简、随州曾侯乙墓编钟等重大考古发现而闻名于世。九连墩古墓群位于湖北枣阳市东赵湖村,距市区约21公里,由9座南北走向的带封土的大中型墓葬组成,绵延约3000