The recent empirical literature on economic sustainability of certified export crops shows that certification standards that enhance yields are important for improving farm revenues and farmer welfare. However, limited evidence exists on the impact of organic certification on the adoption of agro-ecological practices. In this study, we use unique farm-level data from Ghana to examine the impact...

By A. Porter, M.D., F.R.C.S.I., M.R.I.A., F.M.U., Professor Medical Jurisprudence, Madras Medical College. It would appear from Clievers's Medical Jurisprudence, that poisoning by this substance is rare. It is cultivated in most gardens in Southern India, and is known as c the coral plant,' from the appearance of its flowers, or as 4 French physic-nut,' from the appearance and properties of its...

to finality, and it is our present intention to refine and extend this work as much as possible on the experimental side. 1 B. Davis, Physic. Rev., 9, 64 (1917). 2 D. L. Webster, Ibid., 9, 220 (1917). 8 B. Davis, Ibid., 11, 433 (1918). 4 D. L. Webster and A. E. Hennings, Ibid., 21, 312 (1923). ' H. A. Kramers, Phil. Mag., 46, 869 (1923). 6 W. W. Nicholas, Physic. Rev., 29, 619 (1927). 7 A. Jons...

Historians of medicine, childhood and paediatrics have often assumed that early modern doctors neither treated children, nor adapted their medicines to suit the peculiar temperaments of the young. Through an examination of medical textbooks and doctors' casebooks, this article refutes these assumptions. It argues that medical authors and practising doctors regularly treated children, and were c...

In this work, we are modelling the physic-chemical parameters of water using bioindicator data (diatom taxa abundance data). Chemical status of the water (or water quality class) is defined by the values of measured physic-chemical parameters. Traditional approach to model these data is to learn a separate model for each parameter and then derive a global overview with some kind of summarizatio...

Sugarcane sector has a strong impact as a wealth generator for Brazil. Several authors discuss the importance of quantifying an agro-industrial system. This article aims to analyze the development of the Brazilian sugarcane sector over the past five years and to assess whether the method of mapping and quantification of agribusiness systems (GESis) is a useful tool for analyzing the economic de...

Nathalie Berger,a Bertrand Dubreucq,a François Roudier,b Christian Dubos,a and Loı̈c Lepinieca,1 a Institut Jean-Pierre Bourgin, Unité Mixte de Recherche 1318 Institut National de la Recherche Agronomique–Agro-ParisTech, Saclay Plant Sciences, 78026 Versailles cedex, France b Institut de Biologie de l’Ecole Normale Supérieure, Centre National de la Recherche Scientifique Unité Mixte de Recherche...

*The University of Michigan, Artificial Intelligence Laboratory & Space Physic Research Laboratory, 2455 Hayward Avenue, Ann Arbor, Michigan 48109-2143 (313) 747-4581 FAX (313) 764-5137 EMAIL: [email protected] **Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, California 91109 ***Environmental Research Institute of Michigan, Center for Earth Sciences, Advanced Concepts Division, P...