Journal
THERMAL SCIENCE
Volume 19, Issue -, Pages S143-S144Publisher
VINCA INST NUCLEAR SCI
DOI: 10.2298/TSCI15S1S43W
Keywords
fractal geometry; fractal porosity; polar bear; hollow hair
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Funding
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- National Natural Science Foundation of China [11372205, 51463021]
- Project for Six Kinds of Top Talents in Jiangsu Province [ZBZZ-035]
- Science & Technology Pillar Program of Jiangsu Province [BE2013072]
- Yunnan province NSF [2011FB090]
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Hairs of a polar bear (Ursus maritimus) are of superior properties such as the excellent thermal protection. Why do polar bears can resist such cold environment? The paper concludes that its fractal porosity plays an important role, and its fractal dimensions are very close to the golden mean, 1.618, revealing the possible optimal structure of polar bear hair.
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