Digital logic elements provide additional functions from analog input

A dc analog input can be used to produce an integrator with high dynamic range or a position servo with inherent stability. This is done by a switching system using digital-to-analog converters and an electronic switch to obtain the desired outputs

Nutrient digestibility and growth response of rainbow trout (Salmo gairdneri ) fed different carbohydrate types

Seven groups of fingerling rainbow trout (S. gairdneri ) were fed for 10 weeks on 0%, 10%, 20% and 30% of cassava or rice in isonitrogenous diets. Optimum growth and food utilization was at 20% dietary cassava. High fiber content of the control diet did not suppress protein digestibility in this group. Rather, at all levels, protein digestibility was good and remained between 84.4% and 90.1%. However, in the control group, carbohydrate digestibility was very poor. The cassava diets which had the highest digestible energy as carbohydrate produced the best growth performance, food utilization and protein sparing. At the levels studied, the dietary carbohydrates produced no hyperglycamic effect on the fis

RESHAPING THE CONVENTIONAL WELFARE ECONOMICS FRAMEWORK FOR ESTIMATING THE ECONOMIC IMPACT OF AGRICULTURAL BIOTECHNOLOGY IN THE EUROPEAN UNION

Some of the crucial assumptions of applied welfare economics do not hold any longer in the case of agricultural biotechnology innovations. We review some modifications to the conventional methodologies measuring the size and distribution of agricultural research benefits, which are critical for the assessment of the economic impact of agricultural biotechnology in the European Union. While some modifications are related to the specific features of modern agricultural biotechnology and technology adoption, others are related to the specific institutional settings of the European Union's Common Agricultural Policy and commodity markets.Research and Development/Tech Change/Emerging Technologies,

BIOTECH IN DEVELOPING COUNTRIES: FROM A GENE REVOLUTION TO A DOUBLY GREEN REVOLUTION?

International Development, Research and Development/Tech Change/Emerging Technologies,

Stronger Quantum Correlations with Loophole-free Post-selection

One of the most striking non-classical features of quantum mechanics is in the correlations it predicts between spatially separated measurements. In local hidden variable theories, correlations are constrained by Bell inequalities, but quantum correlations violate these. However, experimental imperfections lead to "loopholes" whereby LHV correlations are no longer constrained by Bell inequalities, and violations can be described by LHV theories. For example, loopholes can emerge through selective detection of events. In this letter, we introduce a clean, operational picture of multi-party Bell tests, and show that there exists a non-trivial form of loophole-free post-selection. Surprisingly, the same post-selection can enhance quantum correlations, and unlock a connection between non-classical correlations and non-classical computation.Comment: 4 pages, 2 figures, substantially revised in response to referee suggestion

BIODIVERSITY VERSUS TRANSGENIC SUGAR BEET: THE ONE EURO QUESTION

The decision of whether to release transgenic crops in the EU is one subject to flexibility, uncertainty, and irreversibility. We analyse the case of herbicide tolerant sugar beet and reassess whether the 1998 de facto moratorium of the EU on transgenic crops for sugar beet was correct from a cost-benefit perspective using a real option approach. We show that the decision was correct, if households value possible annual irreversible costs of herbicide tolerant sugar beet with about 1 E or more on average. On the other hand, the total net private reversible benefits forgone if the de facto moratorium is not lifted are in the order of 169 Mio E per year.Research and Development/Tech Change/Emerging Technologies,

Biodiversity versus Transgenic Sugar Beet: The One Euro Question

The decision of whether to release transgenic crops in the EU is one subject to flexibility, uncertainty, and irreversibility. We analyse the case of herbicide tolerant sugar beet and reassess whether the 1998 de facto moratorium of the EU on transgenic crops for sugar beet was correct from a cost-benefit perspective using a real option approach. We show that the decision was correct, if households value possible annual irreversible costs of herbicide tolerant sugar beet with about 1 or more on average. On the other hand, the total net private reversible benefits forgone if the de facto moratorium is not lifted are in the order of 169 Mio per year.Crop Production/Industries, Research and Development/Tech Change/Emerging Technologies,

Modelling heterogeneity to estimate the ex ante value of biotechnology innovations

After more than a decade of GM crops, literature reports farmers and consumers can gain significantly from the technology, despite the intellectual property rights assigned to the innovator. In this paper we assess the effect of heterogeneity on this distribution of benefits. A two dimensional framework is created to assess the ex ante benefits of an innovation. Given this setting and the scarce data often available, a parametric modelling approach is taken. The two dimensions of heterogeneity, spatial and temporal, are explicitly modelled as they have a different importance for different technologies. Using this framework we can simulate different corporate pricing strategies and evaluate the benefits generated under changing heterogeneity. The framework is tested on the introduction of HT sugar beet in the EU-27.Heterogeneity, Parametric modelling, ex ante, Research and Development/Tech Change/Emerging Technologies,