منابع مشابه
Medical education: future-proof?
External site visits as part of the process of accreditation are an important aspect of quality control of medical education programmes. In 2011/2012 all medical schools (University Medical Centres, UMCs) in the Netherlands had such a visit. According to the accreditation system of the Netherlands and Flanders, accreditation has to be renewed every 6 years. The preparation of the site visit sta...
متن کاملNitrogen and carbon storage in alpine plants.
Alpine plants offer unique opportunities to study the processes and economics of nutrient storage. The short alpine growing season forces rapid completion of plant growth cycles, which in turn causes competition between vegetative and reproductive growth sinks during the early part of the growing season. Mobilization of stored nitrogen and carbon reserves facilitates competing sinks and permits...
متن کاملEnergy Storage in Grid-Connected Photovoltaic Plants
Nowadays, photovoltaic (PV) plants are receiving a very great attention due to their intrinsic ability to directly transform solar energy in electrical energy. Nevertheless, electricity generated from photovoltaic plants can rarely provide immediate response to load demand, as these sources do not deliver a regular supply immediately compatible with consumption needs. In stand-alone PV plants, ...
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ژورنال
عنوان ژورنال: Nature
سال: 2009
ISSN: 0028-0836,1476-4687
DOI: 10.1038/462721a