The development of an integrated modelling system to support decisions on organic farms

This paper was presented at the UK Organic Research 2002 Conference of the Colloquium of Organic Researchers (COR). An Integrated Decision Support System (IDSS) is developed which synthesises current understanding of organic farming by means of a multiple objective framework incorporating GIS, biophysical models and socio-economic models of the farming goals. The IDSS uses a multitiered concept of a farming system as a collection of micro-enterprises at the field level, with individual resource endowments, objectives and activities. Farm-level decision drivers trickle down to affect the micro-level field enterprise selection. Biophysical models describe typical forage, cereal, root and legume output and a user-friendly interfaces permits easy access and output display via a GIS. A prototype of the IDSS framework, being developed as a part of the SAC organic research programme is presented

Baryons still trace dark matter: probing CMB lensing maps for hidden isocurvature

Compensated isocurvature perturbations (CIPs) are primordial fluctuations that balance baryon and dark-matter isocurvature to leave the total matter density unperturbed. The effects of CIPs on the cosmic microwave background (CMB) anisotropies are similar to those produced by weak lensing of the CMB: smoothing of the power spectrum, and generation of non-Gaussian features. Previous work considered the CIP effects on the CMB power-spectrum but neglected to include the CIP effects on estimates of the lensing potential power spectrum (though its contribution to the non-Gaussian, connected, part of the CMB trispectrum). Here, the CIP contribution to the standard estimator for the lensing potential power-spectrum is derived, and along with the CIP contributions to the CMB power-spectrum, Planck data is used to place limits on the root-mean-square CIP fluctuations on CMB scales, $\Delta_{\rm rms}^2(R_{\rm CMB})$. The resulting constraint of $\Delta_{\rm rms}^2(R_{\rm CMB}) < 4.3 \times 10^{-3}$ using this new technique improves on past work by a factor of $\sim 3$. We find that for Planck data our constraints almost reach the sensitivity of the optimal CIP estimator. The method presented here is currently the most sensitive probe of the amplitude of a scale-invariant CIP power spectrum placing an upper limit of $A_{\rm CIP}< 0.017$ at 95% CL. Future measurements of the large-scale CMB lensing potential power spectrum could probe CIP amplitudes as low as $\Delta_{\rm rms}^2(R_{\rm CMB}) = 8 \times 10^{-5}$ ($A_{\rm CIP} = 3.2 \times 10^{-4}$).Comment: 24 pages, 9 figures; comments welcome; v2 references correcte

Crops, crop pests and climate change – why Africa needs to be better prepared

Ongoing investments in agriculture will not deliver for Africa until the destabilising nature of crop pest1 events, especially shock outbreak events, are addressed. As a result of climate change, the prevalence of crop pests will change and the frequency of shock pest events will increase, putting agricultural systems at risk. The granularity of these changes, in terms of choices by farmers, cropping systems and markets, presents a critical challenge

A structural, spectroscopic and theoretical study of the triphenylphosphine chalcogenide complexes of tungsten carbonyl, [W(XPPh3)(CO)5], X=O, S, Se

The series [W(XPPh3)(CO)5], X=O, S, Se has been structurally determined by X-ray crystallography and fully characterised spectroscopically to provide data for comparing the bonding of the Ph3PX ligands to the metal. The P-X-W angles are 134.3°, 113.2° and 109.2°, respectively, for X=O, S, Se. The bonding has been analysed using EHMO calculations which suggest that lower P-X-W angles depend on the relative importance of σ-bonding, which in turn depends on the chalcogen in the order X=Se > S > O. The effect is enhanced by lower energies of the metal σ and π orbital energies

Shear Salvation

At the edge of the world, the wind is strong enough to make you stumble, and it never seems to stop. Constant gusts batter the southernmost tip of Argentina, just across the Strait of Magellan from Tierra del Fuego, where sheep graze on gently rolling grasslands as whitecaps race across the South Atlantic. The story of sheep rancher\u27s routine and how the life of the grassland impacts the people around it

PATRIMONIO ESPAÑOL, CINE ESPAÑOL. EL EXTRAÑO CASO DE JUANA LA LOCA

(…)This essay projects on the Spanish film Juana la loca interpretive categories derived from the study of British historical films such as Elizabeth. It finds in Juana la loca a variant of the tension between the progressivism of narrative content and the reactionary aesthetic form typical of this British film subgenre. This specific film form is a symptom that reveals a great deal about Spanish cultural contradictions at the time (…)(…)Este ensayo aplica al film Juana La Loca las categorías y análisis que ha generado el cine histórico inglés, representado por films como Elisabeth o Lo que queda del día. Así constata en Juana La Loca una variación de la tensión entre el progresismo del contenido narrativo y forma estética reaccionaria propia de este género de cine histórico inglés. En efecto, esta tensión llega a desaparecer sepultada por las irrupciones histéricas de sexualidad de sus planos cortos y la forma lejana de relacionarse con los demás contenidos fílmicos. El autor considera que esta forma específica de film es un síntoma que representa bien todas las contradicciones culturales españolas de los años 20 (…

Television Drama in Spain and Latin America: Genre and Format Translation

Television Drama in Spain and Latin America addresses two major topics within current cultural, media, and television studies: the question of fictional genres and that of transnational circulation. While much research has been carried out on both TV formats and remakes in the English-speaking world, almost nothing has been published on the huge and dynamic Spanish-speaking sector. This book discusses and analyses series since 2000 from Spain (in both Spanish and Catalan), Mexico, Venezuela, and (to a lesser extent) the US, employing both empirical research on production and distribution and textual analysis of content. The three genres examined are horror, biographical series, and sports-themed dramas; the three examples of format remakes are of a period mystery (Spain, Mexico), a romantic comedy (Venezuela, US), and a historical epic (Catalonia, Spain). Paul Julian Smith is Distinguished Professor at the Graduate Center, City University of New York. He was previously Professor of Spanish at the University of Cambridge. He is the author of twenty books and one hundred academic articles

Television Drama in Spain and Latin America

Television Drama in Spain and Latin America addresses two major topics within current cultural, media, and television studies: the question of fictional genres and that of transnational circulation. While much research has been carried out on both TV formats and remakes in the English-speaking world, almost nothing has been published on the huge and dynamic Spanish-speaking sector. This book discusses and analyses series since 2000 from Spain (in both Spanish and Catalan), Mexico, Venezuela, and (to a lesser extent) the US, employing both empirical research on production and distribution and textual analysis of content. The three genres examined are horror, biographical series, and sports-themed dramas; the three examples of format remakes are of a period mystery (Spain, Mexico), a romantic comedy (Venezuela, US), and a historical epic (Catalonia, Spain). Paul Julian Smith is Distinguished Professor at the Graduate Center, City University of New York. He was previously Professor of Spanish at the University of Cambridge. He is the author of twenty books and one hundred academic articles