891 research outputs found
Modulation and heliocentric gradient of low energy cosmic rays near solar minimum, 1965
Modulation and heliocentric gradient of low energy cosmic rays near solar minimum, 196
A survey of the total radiation in space observed by the OGO satellites, 5 September 1964 - 27 May 1968
Graphical and tabular summaries of ionization rates in space recorded by OGO spacecraft ion chamber
Description of data plots from the University of Minnesota ion chamber and electron spectrometer on OGO-1 and OGO-3
Data plots obtained from ion chamber and electron spectrometer experiments aboard OGO A and OGO C satellite
An atlas of 10-50 keV solar flare X-rays observed by the OGO satellites, 5 September 1964 to 31 December 1966
Ionization rate profiles from solar flare X rays observed by ion chambers aboard OGO 1 and OGO
Minimising medicine use in organic dairy herds through animal health and welfare planning
Livestock is important in many organic farming systems, and it is an explicit goal to ensure high levels of animal health and welfare (AHW) through good management. This will lead to reduced medicine use and better quality of animal products. In two EU network projects NAHWOA & SAFO it was concluded that this is not guaranteed merely by following organic standards. Both networks recommended implementation of individual animal health plans to stimulate organic farmers to improve AHW. These plans should include a systematic evaluation of AHW and be implemented through dialogue with each farmer in order to identify goals and plan improvements. 15 research institutions in 8 European countries are involved in the proposed project with the main objective to minimise medicine use in organic dairy herds through active and well planned AHW promotion and disease prevention. The project consists of 5 work packages, 4 of which comprise research activities building on current research projects, new applications across borders, exchange of knowledge, results and conclusions between participating countries, and adopting them to widely different contexts. International and national workshops facilitate this exchange. Focus areas are animal health planning, AHW assessment using animal based parameters and development of advisory systems and farmer groups. Epidemiological analyses of the effect on AHW from reduced medicine use and herd improvements are planned in all participating countries
Farmer groups for animal health and welfare planning in European organic dairy hers
A set of common principles for active animal health and welfare planning in organic dairy farming has been developed in the ANIPLAN project group of seven European countries. Health and welfare planning is a farmer‐owned process of continuous development and improvement and may be practised in many different ways. It should incorporate health promotion and disease handling, based on a strategy where assessment of current status and risks forms the basis for evaluation, action and review. Besides this, it should be 1) farmspecific, 2) involve external person(s) and 3) external knowledge, 4) be based on organic principles, 5) be written, and 6) acknowledge good aspects in addition to targeting the problem areas in order to stimulate the learning process
Aspectos ambientais do cultivo de arroz orgânico, biodinâmico e convencional.
Este trabalho tem o objetivo de comparar aspectos ambientais dos diferentes sistemas manejo de arroz irrigado orgânico, biodinâmico e convencional.SIAPEX
On the Hyperbolicity of Lorenz Renormalization
We consider infinitely renormalizable Lorenz maps with real critical exponent
and combinatorial type which is monotone and satisfies a long return
condition. For these combinatorial types we prove the existence of periodic
points of the renormalization operator, and that each map in the limit set of
renormalization has an associated unstable manifold. An unstable manifold
defines a family of Lorenz maps and we prove that each infinitely
renormalizable combinatorial type (satisfying the above conditions) has a
unique representative within such a family. We also prove that each infinitely
renormalizable map has no wandering intervals and that the closure of the
forward orbits of its critical values is a Cantor attractor of measure zero.Comment: 63 pages; 10 figure
Hazard potential of volcanic flank collapses raised by new megatsunami evidence
Large-scale gravitational flank collapses of steep volcanic islands are hypothetically capable of triggering megatsunamis with highly catastrophic effects. Yet, evidence for the generation and impact of collapse-triggered megatsunamis and their high run-ups remains scarce or is highly controversial. Therefore, doubts remain on whether island flank failures truly generate enough volume flux to trigger giant tsunamis, leading to diverging opinions concerning the real hazard potential of such collapses. We show that one of the most prominent oceanic volcanoes on Earth—Fogo, in the Cape Verde Islands—catastrophically collapsed and triggered a megatsunami with devastating effects ~73,000 years ago. Our deductions are based on the recent discovery and cosmogenic 3He dating of tsunamigenic deposits found on nearby Santiago Island, which attest to the impact of this giant tsunami and document wave run-up heights exceeding 270 m. The evidence reported here implies that Fogo’s flank failure involved at least one fast and voluminous event that led to a giant tsunami, in contrast to what has been suggested before. Our observations therefore further demonstrate that flank collapses may indeed catastrophically happen and are capable of triggering tsunamis of enormous height and energy, adding to their hazard potential
Índice de qualidade da água para monitoramento do recurso hídrico em pequenas propriedades rurais das bacias hidrográficas Mirim São Gonçalo e Camaquã.
Nesse estudo foram amostradas duas pequenas propriedades rurais, de base familiar com o objetivo de avaliar a qualidade de água através do ÍQA desenvolvido pela National Sanitation Foundation ( verificando a adequação para os usos dados à água na propriedade
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