‘Not All That Is White Is Lime’—White Substances from Archaeological Burial Contexts: Analyses and Interpretations

Archaeological burial contexts may include a variety of white substances, but few analyses have been published. This study reports on the physico‐chemical characterization of such residues from seven archaeological sites. It is often assumed that white materials from burial contexts are lime. Our findings demonstrate that they can be gypsum, calcite (chalk), aragonite, brushite, degraded metal, natural (gum) resins or synthetic polymer–based products. These may be present as the result of diagenetic processes, funerary practices or modern contamination. This paper provides an analytical approach for the holistic investigation of white materials encountered in burial contexts.     

Rational Mechanics in the Eighteenth Century. On Structural Developments of a Mathematical Science

Rational Mechanics in the Eighteenth Century. On Structural Developments of a Mathematical Science. The role of mathematics in eighteenth‐century science and of eighteenth‐century philosophy of science can hardly be overestimated. However, philosophy of science frequently described and analysed this role in an anachronistic manner by projecting modern points of view about (formal) mathematics and (empirical) science to the past: From today's point of view one might be tempted to say that philosophers and scientists in the seventeenth and even more in the eighteenth century became aware of the importance of mathematics as a means of ‘representing’ physical phenomena or as an ‘instrument’ of deductive explanation and prediction. But such modernisms are missing the central point, i.e. the ‘mathematical nature of nature’ according to mechanical philosophy. Moreover, the understanding of this mathematical nature changed dramatically in the course of the eighteenth century for various (i.e. mathematical, philosophical and other) reasons – a fact hardly appreciated by former philosophical analysis. Philosophy of science today should offer a more accurate analysis to history of science without giving up its task – not always appreciated by historians – to uncover the basic concepts and methods which seem relevant for the understanding of science in question. This paper gives a ‘structural account’ on the development of rational mechanics from Newton to Lagrange that tries to give justice to the fact that rational mechanics in the eighteenth century was primarily understood as a mathematical science and that – starting from this understanding – also tries to give good reasons for the fundamental change of the concept of science that took place during this period.     

Ein weiterer Blockdruck des Bka' gdams glegs bam in Faksimile

Ohne Zusammenfassung     

New records of the hypercalcified sponge Plectroninia (Calcarea,Minchinellidae) in the Recent deep ocean

Vacelet, J., James, B. 1, & Zibrowius, H., November 2017. New records of the hypercalcified sponge Plectroninia (Calcarea, Minchinellidae) in the Recent deep ocean. Alcheringa 42, 312–319. ISSN 0311-5518

Numerous small specimens of hypercalcified sponges of the genus Plectroninia (Jurassic to Recent) are recorded from deep water in the Atlantic, Indian and Pacific oceans, where they are attached to diverse hard substrata, mostly scleractinian skeletons. Being represented as skeletons of linked calcareous tetractines with an incomplete free spicule complement, the specimens could not be identified at the species level. These observations show that Plectroninia spp. have a wide distribution in the bathyal zone of the Recent World Ocean, where they may be the most common calcareous sponges.

Jean Vacelet* [jean.vacelet@imbe.fr], Benjamin James [ben.james672@gmail.com], Helmut Zibrowius [helmut.zibrowius@gmail.com] UMR 7263 IMBE, Institut Méditerranéen de Biodiversité et d’Écologie Marine et Continentale, CNRS, IRD, Aix Marseille Université, Avignon Université, Station Marine d’Endoume, Rue de la Batterie des Lions, 13007 Marseille, France.     

Children as community planners: embodied activities,visual-spatial thinking,and a re-imagined community

ABSTRACT

This qualitative research endeavor explored the role of embodiment as a pathway to visual-spatial thinking. The researchers relied on an interdisciplinary approach using geography and theater rooted in kinesthetic and empathetic embodied activities to facilitate visual-spatial thinking within the context of a community redevelopment project. The participants consisted of 14 elementary and middle school aged girls attending a Girls Inc. program within a low-income housing community. The researchers situated the findings using McCormack’s ([1998. Visual/Spatial Thinking: An Essential Element of Elementary School Science. Washington, DC: Council for Elementary School Science]; [2011. “Don’t Verbalize, Visualize!” NSTA WebNews Digest. Accessed June 15, 2016. http://www.nsta.org/publications/news/story.aspx?id=58298]) visual-spatial thinking typology and theories of embodiment. The findings revealed that the girls exhibited three types of visual-spatial thinking, which ranged from foundational to highly advanced ways of thinking about space, to include visual-spatial perception, memory, and creative thinking. The results also illustrate that embodied activities that engage sensorimotor functions through an interdisciplinary approach, can facilitate visual-spatial thinking.