Operational USLE-based modelling of soil erosion in Czech Republic, Austria, and Bavaria - differences in model adaptation, parametrization, and data availability

In the European Union, soil erosion is identified as one of the main environmental threats, addressed with a variety of rules and regulations for soil and water conservation. The by far most often officially used tool to determine soil erosion is the Universal Soil Loss Equation (USLE) and its regional adaptions. The aim of this study is to use three different regional USLE-based approaches in three different test catchments in the Czech Republic, Germany, and Austria to determine differences in model results and compare these with the revised USLE-base European soil erosion map. The different regional model adaptations and implementation techniques result in substantial differences in test catchment specific mean erosion (up to 75% difference). Much more pronounced differences were modelled for individual fields. The comparison of the region-specific USLE approaches with the revised USLE-base European erosion map underlines the problems and limitations of harmonization procedures. The EU map limits the range of modelled erosion and overall shows a substantially lower mean erosion compared to all region-specific approaches. In general, the results indicate that even if many EU countries use USLE technology as basis for soil conservation planning, a truly consistent method does not exist, and more efforts are needed to homogenize the different methods without losing the USLE-specific knowledge developed in the different regions over the last decades

The Scientist as Expert

In the course of the First World War, scientists who would in peacetime generate new knowledge assumed the role of experts, i.e., professionals who made extant knowledge accessible to non-scientist clients. The deepest conviction of Fritz Haber, the 1918 Chemistry Nobel laureate, was that problems faced by mankind could be solved by means of science and technology. Herein, Haber is interpreted as a personification of an early German expert culture. Acting as both mediator and organizer, Haber coaxed politicians, generals, industrial leaders, and scientists to join forces in developing new processes for the mass-production of war-relevant chemicals and in establishing large-scale industries for their manufacture. Among the chemicals produced were poison gases—the first weapons of mass extermination. Haber’s leadership resulted in a conglomerate of enterprises similar to what we now call “big science”. In close contact with “big industry”, traditional science was transformed into a new type of applied research. With borderlines between the military and civilian use blurred, Fritz Haber’s activities also represent an early example of what we now call “dual use”. He initiated modern pest control by toxic substances, whereby he made use of a military product for civilian purposes, but went also the other way around: During the Weimar era, he used pest control as a disguise for illegal military research. Having emerged under the stress of war, scientific expertise would remain ambivalent—a permanent legacy of the First World War

International Symposium 100 Years of Chemical Warfare : Research, Deployment, Consequences

On April 22, 1915, the German military released 150 tons of chlorine gas at Ypres, Belgium. Carried by a long-awaited wind, the chlorine cloud passed within a few minutes through the British and French trenches, leaving behind at least 1,000 dead and 4,000 injured. This chemical attack, which amounted to the first use of a weapon of mass destruction, marks a turning point in world history. The preparation as well as the execution of the gas attack was orchestrated by Fritz Haber, the director of the Kaiser Wilhelm Institute for Physical Chemistry and Electrochemistry in Berlin-Dahlem. During World War I, Haber transformed his research institute into a center for the development of chemical weapons (and of the means of protection against them). Bretislav Friedrich and Martin Wolf (Fritz Haber Institute of the Max Planck Society, the successor institution of Haber’s institute) together with Dieter Hoffmann, Jürgen Renn, and Florian Schmaltz (Max Planck Institute for the History of Science) organized an international symposium to commemorate the centenary of the infamous chemical attack. The symposium examined crucial facets of chemical warfare from the first research on and deployment of chemical weapons in WWI to the development and use of chemical warfare during the century hence. The focus was on scientific, ethical, legal, and political issues of chemical weapons research and deployment ― including the issue of dual use ― as well as the ongoing effort to control the possession of chemical weapons and to ultimately achieve their elimination. The volume consists of papers presented at the symposium and supplemented by additional articles that together cover key aspects of chemical warfare from 22 April 1915 until the summer of 2015

Nanoparticles effects on the thermomechanical properties of a fluoroelastomer

International audienc

Fluoroelastomer based nanocomposites : Investigation of the morphological and thermomechanical properties

International audienc