浅谈3D打印技术在陶瓷类文物修复和复制中的应用

3D打印技术已在多领域证明其高效性以及便捷性,成为社会热点。由于3D打印带有非接触式扫描的特点,这对于文物修复工作者而言,是在复制和修复过程中,为保护材质脆弱、价值珍贵的陶瓷类文物的可引进的新手段。在简单介绍3D打印技术复制陶器的主要过程之后,通过实例细致地了解每一个具体步骤,分析液化打印、粉末打印等不同打印技术的优缺点,如何在不同需求下进行选择;并且介绍在得到3D打印复制件后,通过复制件表面上色、纹饰加工处理等步骤完成整个复制品。3D打印技术不仅可被运用于文物复制,而且能以其与传统修复手法相比之下的无损、快速、精确等特点,在文物修复中发挥作用。     

Testing technological practices: neutron activation analysis of neolithic ceramics from Valencia,Spain

Using instrumental neutron activation analysis (INAA) of prehistoric pottery, daub, and modern clay samples from Valencia, Spain, we tested expectations on changes in raw material use with socio-economic shifts during the Neolithic (ca. 5600–2800 BC). Elemental analysis identified three distinctive clay source groups used by Neolithic potters. Contrary to expectations, a shift in raw material use was identified between the Early and Middle Neolithic despite general similarities in technological practices. In the Late Neolithic, pottery production became more specialized, but potters used the same range of clay sources documented earlier. This study illustrates the utility of INAA for testing hypotheses of prehistoric craft production.     

Meaning in the making: The potter’s wheel at Phylakopi,Melos (Greece)

It is now commonly accepted that technology is, to its very core, a social product through which we can explore cultural choices. This cultural dimension of technology will be examined with reference to the introduction and use of the potter’s wheel at Phylakopi on Melos (Greece) during the Late Bronze Age. At this site, the co-existence of two different manufacturing techniques was so deeply embedded that, despite the presence of hybrid vessels, many aspects of the pottery production had become linked to either a local (hand-built) or Minoanising (wheel-thrown) tradition. It will be argued that the traditional hand-building technique was associated with individual and rooted facets of the Melian identity (such as kinship, social class, or gender). Reasons for the initial stimulus for adoption of the potter’s wheel are considered to lie in its potential for competitive social practice through association with exotic, symbolically laden technologies, craft products and consumption rituals. The gradual application of the technology to ever more complex vessels, on the other hand, corresponds to the apprenticeship sequence outlined by Roux and Corbetta and may indicate an incomplete learning process or a certain lack of practice opportunities among local potters.     

More is more: Scaling political ecology within limits to growth

This piece responds to the article Is less more… or is more less? Scaling the political ecology of the future, where Paul Robbins (2019) discusses degrowth and modernism as two competing political imaginaries with regard to the growth-technology-environment nexus. Arguing from the perspective of ecological economics, I engage with the literature on political ecology to discuss the notions of limits to growth, Malthusianism, austerity and scarcity, as well as the role of technology as both environmental problem and solution. The paper exposes key divergences between different traditions in political ecology with regard to technological and economic scale. First, against the argument that limits to growth is a mere social construct, I call attention to research on ecological thresholds and to the perils of epistemic relativisms in a post-truth era. Second, against the idea that limits represent an elitist discourse, I call attention to long-standing traditions in emancipatory politics that defend limits in the name of justice. Third, against the thesis that more is less, I refer to mounting empirical evidence indicating that more is more (growth brings more environmental destruction, not less). I contend that political ecology can have much to gain from engaging with the political utopia of degrowth, but far less so from the technological utopia of modernism, which –I argue– reinforces status quo and offers false solutions to the environmental challenges of our time. Emancipation, I claim, is not about bringing more to more, but about bringing enough to everyone.     

Identification of Pottery‐Forming Techniques using Quantitative Analysis of the Orientation of Inclusions and Voids in Thin Sections

The relationship between forming techniques and orientation of the components of ceramic materials in the context of pottery technology has long been recognized and used for identification of the techniques employed to create archaeological ceramics. The alignment of inclusions is usually characterized by qualitative categories or ordinal scales. This paper evaluates the potential of quantitative orientation analysis for identification of pottery‐forming techniques. A collection of experimental pottery formed using five forming techniques and combined techniques was analysed. The forming techniques were characterized by the intervals of the mean direction and the circular standard deviations of the orientation of the major axes of the ellipses equivalent to the objects representing random sections of inclusions and voids. The most informative criteria for the identification of pottery techniques are the circular standard deviation of the inclusion/void orientations in the core area of the vessel wall in a perpendicular thin section and the mean direction in a tangential section.     

Integrated IT-based Geography Teaching and Learning: A Macquarie University case study

Use of information technology (IT) is increasingly common in geography teaching and learning. This paper outlines a still relatively unusual initiative involving the integrated use of a variety of IT-based components across all aspects of a large course unit. Multiple evaluations reveal strongly positive reactions to the IT-based approach and the time and place flexibility offered; there are few technical impediments to, and no detectable gender differences in, students' use of the system. Most aspects of the integrated approach work well, although it has not yet succeeded in facilitating a genuinely participative online dialogue. Many aspects of the initiative can be transferred cost-effectively to other contexts.     

Temper mixture models and assessing ceramic complexity in the emerging Tarascan state

This study presents compositional data from ceramics drawn from surface survey and controlled excavations from three prehispanic sites within the relatively small Lake Pátzcuaro Basin, representing a ceramic sequence stretching nearly 1500 years, from the Preclassic to Late Postclassic Tarascan state (ca. 50 B.C.–1525 A.D.). Using neutron activation analysis, we identify compositional groups and model the importance of volcanic materials as temper in the construction of prehispanic ceramics by matching mathematical simulations of clay–ash mixes to the compositional groups. Rather than discreet clay resources and spatially circumscribed production, we argue for a broadly dispersed and highly varied organization of pre-Tarascan and Tarascan state ceramic production in which the potters' distribution and use of specific volcanic ashy additives, not clays, structured the organization of production.     

Structural ways to embed a research laboratory into the company: A comparison between Philips and General Electric 1900-1940

This paper compares the Philips Research Department and the Research Laboratory of the American company General Electric (GE). 1 It argues that it is, above all, the issue of the organization of industrial research, appropriate leadership and the embeddedness of a research department in the company as a whole that is important for an historical analysis of an industrial research department. The complex structures that Gilles Holst (the first Philips research director) and Willis Whitney (the GE research director during the first decades of the twentieth century) set up in their organizations enabled scientists to keep in touch with the resources provided by the universities, and made it possible for them to come up with articles, patents and devices for their respective companies. It enabled them also to strengthen their contacts inside and outside the laboratory's walls. However, more than his colleague Whitney at GE, Holst at Philips intended to integrate the research laboratory into the company as a whole. Holst's policy as a research director will be illustrated using the case of Philips' radio research. A comparative discussion of industrial research in the 1930s within both companies shows that the "successful" integration of research activities is context-dependent.     

Displaying the future: techno‐nationalism and the rise of the consumer in Postwar Japan

This paper explains how, in the aftermath of World War II, a type of techno‐nationalism emerged that linked being Japanese to science and technology and the increased consumption of electrical appliances. By closely examining official exhibitions, we can see how the state and private sector strongly encouraged this techno‐scientific dreaming. Dazzling displays highlighted how the peaceful atom would help lead the nation to achieve high economic growth. At the same time, through the judicious purchase of labor saving appliances, consumers could reconcile the need to spend with the need to save.