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Purpose Vitamin D is a key component for the growth and development of children and adolescents, influencing a multitude of functions. Worldwide epidemiological studies have shown that minimum vitamin D blood levels of ≥ 20.0 ng/ml, often defined as vitamin D sufficiency by international and national nutrition and pediatric organizations, are often not met in practice. In 2012 the D–A–CH (Germany,...
The present paper proposes a study for the integration of a hybrid power system composed by rechargeable batteries and fuel cells with chemical gas storages for an Autonomous Underwater Vehicle (AUV) or Unmanned Undersea Vehicles (UUV). AUVs and UUVs are vehicles that are primarily used to accomplish oceanographic research data collection and auxiliary offshore tasks. At the present time they are...
This paper presents a statistical and techno-economic feasibility study for the exploitation of renewable energy generators and energy storage devices typically installed onboard pleasure boats to transform harbors and ports in energy districts able to exchange energy with the grid. In Europe about 48 million citizens regularly participate in recreational marine activities (36 million of whom are...
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