Measuring reduction in stone tools: an ethnoarchaeological study of Gamo hidescrapers from Ethiopia

Stone tools were knapped, not built. This truism means that tools were reduced from larger pieces in the production process. But many tools were further reduced in use, to repair damage or as edges dulled. Reduction reduced size (trivially), but also changed the proportions among tools' elements or dimensions. Such allometric variation (change in proportion as a function of change in size) is useful to estimate the degree of reduction that tools experienced. Reduction itself is a measure of curation, a theoretical concept of great interest in lithic studies and Paleolithic archaeology. To determine the reduction that archaeological tools experienced, we must compare their size and proportions at first use to the same properties at discard that we directly measure. By now many size estimates can be made from discarded tools. Some are experimentally tested but few are validated using direct ethnoarchaeological controls. We validate two allometric reduction measures—ratios of plan area to thickness and of an estimate of original to discarded volume—against direct measures of use and reduction in ethnographic Gamo hidescrapers from Ethiopia.     

战国秦汉时期长江中游地区气候状况研究

本文根据历史文献、考古材料和钻孔孢粉资料等,对战国秦汉时期长江中游地区的气候状况进行了初步的探讨。结果表明:战国初期,该地气候温暖湿润;战国中后期至西汉武帝后期,气温下降,气候温凉,极端寒冷事件不断出现;约从公元前100年始,气温明显回升,至公元初年前后,长江中游地区复为温暖湿润的气候环境;公元之初的新莽政权时期,气候经历了由暖而寒的历史转变,降温过程大致持续到东汉明帝时期;之后至东汉中后期,气候暖湿,尤其是冬季气温相对较高;东汉后期,气候再度出现了幅度不大的波动,标志着魏晋南北朝时期大降温的开始。此间气候虽屡有起伏,但总体而言,战国秦汉时期长江中游地区的气候仍以暖湿为主,气温略高于今,或与现今差别不大。在干湿状况方面,具有干湿相间的特点。     

“巴蜀文化”研究发韧

"巴蜀文化"作为一个科学命题,是在抗日战争期间正式提出来的。抗战全面爆发后,随着大批高等院校和科学研究机构的内迁,国内许多知名教授和专家学者进入四川,在极为艰难的条件下,坚持科研。其中一些大学者,鉴于四川上古史的复杂性,开始潜心研究有关史料和当时极为有限的考古资料,于是提出"巴蜀文化"的命题,引起国内学术界的热烈讨论和争辩,巴蜀文化研究竟一时蔚然成风,终至成为一个科学命题而为国内外学术界所承认。     

试论周代宗庙制度及其变迁

周人在战国以前没有毁庙制度,坚持践行宗庙都宫制。天子七庙制度可能是战国以降才逐渐确立的。两周姬姓诸侯多以所出之周王为庙尊太祖。     

Keeping migrants at the margins. Governing through ambiguity and the politics of discretion in the post-2015 EUropean migration and border regime

This article deals with the roles of ambiguity and discretion in the governing of migration and how they contribute to the marginalisation of migrants at the borders of EUrope. Building on ethnographic research and interviews conducted in Sicily, it connects legal-institutional ambiguities of two recent policy interventions in the field of migration governance in Italy – the Security Decree-Law and the Hotspot Approach – to the discretionary practices by public officials tasked with their implementation. By theoretically and empirically tracing the co-constitutive relationship of ambiguity and discretion, the article draws on and contributes to recent inquiries into grey areas of governance, particularly in the field of (critical) border regime studies. Based on two distinct cases, it analyses how ambiguity and discretionary local practices are related both to each other and to the contemporary fragmentary reconfiguration processes of the EUropean Migration and Border Regime, and shows how they intersect to form spatio-juridical grey areas that foster the spatial and social marginalisation of migrants in EUrope.     

The Chronology of Settlements with Pre‐Inca and Inca Occupations Superimposed: the Case of Pucará de Tilcara (Humahuaca Gorge,Argentina)

The region of the Central and South Andes was, in about the ninth and 15th centuries ad , the stage for the development of political systems tending towards demographic centralization in villages with defensive structures, known as Pucará. The chronological accuracy for these phenomena still remains uncertain, mainly because it involves intervals of long and superimposed occupations, masked by the Inca domination. Thus, this paper analyses the history of the occupation at Pucará de Tilcara, one of the biggest populated centres of the Humahuaca Gorge (Quebrada de Humahuaca, Argentina). Twenty‐five radiocarbon dates are critically evaluated to judge its reliability. The Bayesian statistics show that all the dated spaces were used on a long‐term basis. The most ancient signs are in the middens and relate at least to the 10th century ad , and the occupation of the housing areas could be calculated to the 13th and 16th centuries. A phase of higher intensity of occupation is observed during the Inca period. This redefinition of this site occupation shows the need to statistically analyse the dates in order to differentiate the phases of occupation.     

抗战时期西北皮毛贸易与大后方经济变动

皮毛是西北地区重要的畜牧产品。近代以来,随着天津的开埠通商,在天津口岸的经济辐射作用下,大量西北皮毛通过黄河水运汇集至包头后再通过平绥铁路运至天津出口美英等国,皮毛成为西北最重要的出口物资,大量西北皮毛的出口也成为西北地区皮毛业外向化的重要表现。但抗战爆发以后,西北皮毛贸易发生了巨大变化。首先,西北皮毛出口运输路线改为向西汇集兰州后再通过甘新公路或甘新大道运至猩猩峡出口苏联,使得苏联取代战前美国成为中国最大皮毛进口国,这也直接推动了战时中苏易货贸易的发展。其次,由于战时西北皮毛出口运输较战前出口运输路途艰险,加上战时出口市场萎缩等原因,造成战时西北皮毛出口量较战前减少。战时西北皮毛出口量的减少,迫使部分皮毛出口转内销,西北皮毛业从战前外向化开始转为战时内向化。西北皮毛内销数量的增加,也推动了大后方毛纺织业的发展。因此,战时西北皮毛业的内向化一定程度上为战时大后方经济的发展积累了新的动力因素。     

A Base Isolation System for Developing Countries Using Discarded Tyres Filled with Elastomeric Recycled Materials

This article studies the performance of economic base isolators using tyres filled with elastomeric recycled materials. The research was conducted to analyze base isolators to be used in developing nations, where the application of conventional elastomeric rubber bearings due to economic reasons is limited.

The tested isolators are made of kart tyres filled with different recycled elastomeric materials and aggregates. Dynamic and static tests proved acceptable vertical to horizontal stiffness ratio of the bearings and shake table tests showed an excellent enhancement of the base isolated structural response compared to the corresponding fixed base structure.     

清代伊克昭盟长城沿线“禁留地”诸概念考释

清初陕北边外禁留地承自明代烧荒形成的隔离蒙汉的黑色地带。乾隆八年,双方在边外五十里一线划出有形界线,称黑(牌)界,该谓附会于烧荒形成的黑色地带,是汉人对边外自然景观记忆延续的反映。黑界以内,伊克昭盟各旗汉族移民的耕地范围并不相同,使得黑界与移民垦殖北界之间形成宽窄不一的土地,由此衍生出当时文献未言,却实际存在的所谓黑界地。牌界地是指边墙与牌界之间的土地。伙盘地是移民定居和租耕之地,具有不连续分布的空间特征。白界地一称晚出于民国绥远编纂的文献,实为牌界地的异写,其产生可能与牌借地、白借地称谓有关。陕绥双方对诸称谓的不同书写,反映各自从己方利益和地方本位的角度,对重构清代鄂尔多斯南缘汉族移民垦殖史的不同表达和现实立场。     

Consequences of Designating the Recent Past: Korreweg-district,Groningen, The Netherlands

The article focuses on the meaning of heritage, especially on its connection to time, space and people, and is concerned with signification, representation and identity at a national scale. Key questions are how the image of Estonianness creates national heritage out of diverse legacies and how these messages fit the local circumstances. This is examined in the case of Paldiski, a small town on the Pakri Peninsula west of the Estonian capital Tallinn. The area encompasses all that is considered non‐Estonian, but nevertheless reflects the history and geography of the country and thus is used for critical examination of current heritage creation and preservation.