منابع مشابه
Self-Assembling Intelligent Lighter-than-air Structures
Through the use of flying automata (aerobots), the [ VOILES | SAILS ] project aims to port to the physical world some of the functionalities observed in artificial life systems, with a particular focus on simulations of assemblages and behaviors derived from the observation of animal societies (coral reefs, anthills) that can collectively produce high performance structures with extremely limit...
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Ever since his earliest times, man must have dreamed of copying the birds; of flying, of gaining mastery over the third dimension of space. The earliest practicable route to achieve the aim of flying was in the use of balloons. The first balloons were hot-air balloons; they relied on the lower density of hot air, compared to that of the surrounding air, to obtain the lift they needed. Balloons ...
متن کاملPossible reason why leptons are lighter than quarks.
The minimal model of spontaneously broken leptonic colour and discrete quarklepton symmetry predicts that charged leptons have the same masses as their partner charge +2/3 quarks up to small radiative corrections. By invoking a different pattern of symmetry breaking, a similar model can be constructed with the structural feature that charged leptons have to be lighter than their partner quarks ...
متن کاملDynamic Response to Turbulence of Tethered Lighter-Than-Air Platforms
The study presented in this paper concerns the development of an algorithm, based on finite element analysis, for the dynamic simulation of a tethered lighter-than-air balloon when subjected to operational conditions. The main features of the algorithm are described, highlighting the advantages of this approach when performing dynamic analysis. The input parameters considered in the method are ...
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D yspnoea and reduced exercise tolerance are the hallmarks of chronic obstructive pulmonary disease (COPD). In the advanced phases of the disease the ability to exercise is mainly limited by the combination of a reduced ventilatory capacity, increased ventilatory requirement and lung dynamic hyperinflation. Importantly, the aforementioned respiratory mehanical abnormalities are well recognised ...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1898
ISSN: 0036-8733
DOI: 10.1038/scientificamerican08271898-139