نتایج جستجو برای: production index
تعداد نتایج: 985712 فیلتر نتایج به سال:
We assemble the Irish industrial data currently available for years 1800–1921, period during which entire island was in a political union with Great Britain, and construct an annual index of output 1800–1913. also new price index. grew by average 1.3 per cent annum between 1800 outbreak First World War. Industrial growth slightly slower than previously thought, especially two decades immediatel...
BACKGROUND Knowledge production and evaluation are two important functions of health research system (HRS). In this article, we aimed to reveal the correlation between evaluation of health research organizations and health knowledge production promotion. METHODS A comprehensive evaluation system was developed to evaluate the academic performance of national medical science universities on an ...
we investigated the environmental impact of trout farm discharge on zayandeh-rud river. three farms with different production capacities; 250, 25 and 70 tones were assigned to this study. five sampling sites were designated to each farm. benthic macroinvertebrates were collected in autumn, winter, and spring using the quantitative techniques. a total of 11 classes, 16 orders and 53 families&apo...
Exploited ecosystems are characterised by exports of secondary production from each fished trophic level that reduce the energy available for upper levels at the ecosystem scale, thus impinging on overall secondary production. Depletion in secondary production is proposed here as a proxy for quantifying the ecosystem effects of fishing. Theoretical analysis of trophic web interactions permits t...
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