Automatic vs Manual Provenance Abstractions: Mind the Gap

In recent years the need to simplify or to hide sensitive information in provenance has given way to research on provenance abstraction. In the context of scientific workflows, existing research provides techniques to semi automatically create abstractions of a given workflow description, which is in turn used as filters over the workflow's provenance traces. An alternative approach that is commonly adopted by scientists is to build workflows with abstractions embedded into the workflow's design, such as using sub-workflows. This paper reports on the comparison of manual versus semi-automated approaches in a context where result abstractions are used to filter report-worthy results of computational scientific analyses. Specifically; we take a real-world workflow containing user-created design abstractions and compare these with abstractions created by ZOOM UserViews and Workflow Summaries systems. Our comparison shows that semi-automatic and manual approaches largely overlap from a process perspective, meanwhile, there is a dramatic mismatch in terms of data artefacts retained in an abstracted account of derivation. We discuss reasons and suggest future research directions.Comment: Preprint accepted to the 2016 workshop on the Theory and Applications of Provenance, TAPP 201

HOW COMPETITIVE IS THE WORLD WHEAT MARKET?

Japan is one of the largest importers of wheat in the world, with imports originating from three countries, Australia, Canada, and the United States. Australia, Canada, and Japan all use a government single-desk agency to control wheat trade. Many previous studies on competition in the world grain trade have argued the market is imperfectly competitive, and they often point to the Japanese market. We study the Japanese wheat import market for this reason, but find no compelling evidence of imperfect competition.wheat trade, competition, Crop Production/Industries, International Relations/Trade, F14, L10, Q17,

Studies of hepatic synthesis in vivo of plasma proteins, including orosomucoid, transferrin, α-antitrypsin, C8, and factor B

Serum protein types were determined in eight recipients and donors in cases of hepatic homotransplantation. A change from recipient type to donor type was observed for factor B, C8, orosomucoid, haptoglobin, transferrin, α1-antitrypsin, C3 and C6, but not for Gm and Inv immunoglobulin markers. The results indicate that all the proteins studied (except immunoglobulins) are produced primarily by the liver in vivo. © 1980

Exchange Rate Volatility and Trade Flows

After the collapse of Bretton-Woodssystem in 1973, many countries adopted the floating exchange rate regime. Thissituation led to fluctation and uncertainties in the exchange rates. There arenumber of studies that analyze the effect of Exchange rate volatility on tradeflows but previous studies cannot obtain results about sectoral base due to thelack of disaggregated data sets. This study investigates the effects ofexchange rate volatility on trade flows in Turkey. For this purpose usingannual data covers the period 2002-2013. Exports to 15 European countries andimports from 15 European countries are analyzed by panel methodology. According to the test results, export sectorsare negatively affected; import sectors are both positively and negativelyaffected from exchange rate volatility