Experimental explorations into the aceramic dry distillation of <Emphasis Type="Italic">Betula pubescens</Emphasis> (downy birch) bark tar

A range of experiments were conducted in an attempt to create tar from the bark of Betula pubescens (downy birch) using an aceramic dry distillation process. Fire structures based on small pits and small kiln-like mounds were explored with a focus on fire intensities and differing burn times under field-based conditions. Heat penetration presented itself as an all-important factor, and the depth of the construction of the structures and features was considered to directly correlate to the impact of the heat. Single variable experiments confirmed that the necessary reducing atmosphere was achievable despite friable soil, but that heat would not penetrate a 50- to 80-mm-deep layer of grass turf. The evolution of structures from pits towards a raised type resulted in kiln-like structures which proved more successful. Though the experiments did not successfully produce tar as a finished product, they did lead to a better understanding of the dry distillation process of the established technology of birch bark tar extraction in aceramic societies.     

Effects of Economic and Environmental Reform on the Diffusion of Cleaner Coal Technology in China

Despite the urgent need to address severe air pollution problems caused by China's coal consumption, diffusion of cleaner coal technologies (CCTs) has been slow. This contribution utilizes the fragmented authoritarianism model to explain this slow diffusion by examining the structure of bureaucratic decision making and changes in incentives that have accompanied fiscal decentralization and enterprise deregulation. Case studies on the diffusion of two CCTs — flue gas desulphurization (FGD) and coal washing — highlight challenges of environmental policy design and implementation during the economic reforms of the past decade. Enterprises had little incentive to adopt FGD when central government agencies disagreed on promoting the technology and local agencies did not rigorously enforce national air pollution control policies. For washed coal, production slowed when coal pricing reform and coal industry restructuring were not co‐ordinated with environmental policies. Further promotion of CCTs in China requires changes in incentive structures for local governments and enterprises, as well as enhanced policy co‐ordination among central government agencies.     

GrenzWerte—55. Deutscher Geographentag in Trier

Unter dem Motto GrenzWerte wird der 55. Deutsche Geographentag vom 1. bis 8. Oktober 2005 in Trier stattfinden. Inmitten der Großregion SaarLorLux/Rheinland-Pfalz/Wallonien, die selbst von Grenzen unterschiedlichster Art durchzogen und umgeben ist, werden die Öffnung Europas nach Osten und weitere interessante Grenzaspekte Deutschlands thematisiert. Vielerorts wird diskutiert über Grenzen, die erreicht sind, beispielsweise im Verkehrswesen, beim Umweltschutz oder in Nachhaltigkeitsfragen. Das Motto GrenzWerte hat diesen Trend aufgegriffen und ließ neben der räumlichen auch eine inhaltliche Grenzdimension entstehen. Darüber, welche Anknüpfungspunkte sich daraus für die Angewandte Geographie ergeben, sprach der stellvertretende Vorsitzende des DVAG, DIPL.-GEOGR. KAI PARTALE , mit dem Vorsitzenden des Ortsausschusses für den Geographentag in Trier und Professor für Angewandte Geographie und Raumentwicklung an der Universität Trier, PROF. DR. HEINER MONHEIM.     

Raw or Pre-Fired: Kiln Construction at Sawankhalok,North Central Thailand,as a Guide to Ceramic History

Sawankhalok, located in north central Thailand, was an early stoneware ceramic production site where the first kilns were dug cave-like into the natural ground, a method used in China for thousands of years. After a century or so, kilns at Sawankhalok began to be constructed of brick. It is suggested that if the bricks were pre-fired then an external influence may have been responsible. To the contrary, if raw unfired clay was used in the construction of the kilns the evolution was more likely a consequence of conceptual continuity.With the aid of chemical and mineralogical analyses it is shown that the kiln bricks were unfired at the time of kiln construction thereby suggesting that traditional conservatism, apparent in many aspects of the industry, caused processes to remain unaltered in the absence of a persuasive reason for change. These conclusions reflect on the degree of indigenous technology and artistic development associated with Sawankhalok ceramics as opposed to external influence.     

A History of Normative Theory in Americanist Archaeology

Efforts in the 1960s to demonstrate the value of the new archaeology involved showing that the competing culture-history paradigm was inferior. One allegedly weak plank in that paradigm had to do with how culture historians viewed culture—as a set of ideas transmitted in the form of ideal norms or mental templates. Lewis Binford referred to this view as normative theory. In archaeology that view was manifest in the equation of artifact types with prehistoric norms—an equation that, according to Binford, the culture historians had made so that they could track the flow of ideas through time and thus write culture history. Culture historians regularly subscribed to cultural transmission as the theoretical backdrop for their artifact-based chronometers such as seriation and the direct historical approach, but with few exceptions they perceived only a weak relationship between norms and artifact types. It was not until 1960, in a paper by James Gifford, that what Binford labeled as normative theory appeared in anything approaching a complete form. Ironically, the first applications of normative theory were products of the new archaeologists, not the culture historians.     

Voyages,mobilités,lumières

For a very long time and still today, travel stories have fascinated a vast public. It is important to debate their role and the model for intellectual and sensitive construction they propose. An essential link for the European elite's acculturation, they cannot for as much be separated from a much wider circulation which concerns society as a whole. In relation to the social morals of our past, the concept of mobility allows us to appreciate the totality of social practices and to confront the notions of movement and localization. The main cultural categories of space, time, sociability, social constraints and freedoms, are thus creating a structure for our understanding of change.