Inductive programming approaches typically rely on an Occamist bias to select hypotheses with minimal textual complexity. This approach, however, fails to distinguish between the efficiencies of hypothesised programs, such as merge sort (O(n log n)) and bubble sort (O(n2)). We address this issue by introducing techniques to learn logic programs with minimal resource complexity. We describe an a...

ERP implementations have the potential of significantly complementing the use of business-to-business e-commerce technologies. We consider the sources of this complement by drawing on transaction cost economics, the resource-based view of the firm and the theory of swift even flow. Analysis of 115 firms shows that perceived transactional efficiencies are greater for B2B e-commerce technologies ...

The current method used for calculating societal aggregated exergy efficiencies is reviewed. Cooling is introduced as an end-use category; conversion efficiencies for heating processes are obtained for each energy carrier; and electricity shares per end-use are retrieved for each sector, improving the accuracy of the estimated values of aggregated exergy efficiencies. We show that: (1) cooling ...

in the present study, the root vigor and kinetic characteristics of nitrogen absorption in potato cultivars was investigated through sand cultivation and pot tests with nutrient solution. four cultivars of potatoes, namely, feiwuruita, yunshu301, liangshu97, and chuanyu56 were grown in nutrient solution matrix cultures. the result showed that: (1) nitrogen uptake rates differed significantly am...

A mechanistic understanding of population dynamics requires close examination of species’ differences in how physiological traits interact with environmental variation and translate into demographic variation. We focused on two co-occurring winter annual species (Pectocarya recurvata and Plantago insularis) that differ in photosynthetic resource-use efficiency and demographic responses to envir...

Improving photosynthesis throughout the full canopy rather than photosynthesis of only the top leaves of the canopy is central to improving crop yields. Many canopy photosynthesis models have been developed from physiological and ecological perspectives, however most do not consider heterogeneities of microclimatic factors inside a canopy, canopy dynamics and associated energetics, or competiti...

Interpopulation variation in the diet of the wood mouse, Apodemus sylvaticus, is well documented. In this study, we examined the gut morphology and apparent absorption efficiencies of two populations of wood mice whose diet in the field was known to differ. One population inhabited sand dunes, where food availability was relatively low and the diet was dominated by invertebrates. The other popu...

improving the resource use efficiency in agro- ecosystems is an importantfactor for reducing environmental pollution. to evaluate phosphorus (p) efficiency andbalance indicators, research was conducted in wheat and saffron production systems inthe qaenat region (south khorasan province, iran) during 2011 and 2012, based on themethod of the organization for economic co-operation and development ...