Heavy ice
نویسندگان
چکیده
منابع مشابه
Sliding heavy stones to the Forbidden City on ice.
Why Ice? From ancient Chinese literature, Li et al. (1) learned that the Large Stone Carving (>300 tons) was transported to the Forbidden City on a wooden sledge that was hauled by men across an icy road, during the period between the winter solstice (December 22 ± 1 d) and late January when the average temperature in Beijing at the time was found to be −3.7 ± 0.5 °C. Although a detailed accoun...
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To mutate the Ice Nucleation Active (INA) gene in Erwinia herbicola strains, Tn-5 transposon carried by Psup2021 plasmid was used. This plasmid was transferred to the bacterial cells by electroporation. Electrotransformation was carried out for 2.5 ms at 1800 v and 1 mm distance between the electrodes. Polymerase chain reaction was used for determination of presence or loss of INA gene, using a...
متن کاملIce lubrication for moving heavy stones to the Forbidden City in 15th- and 16th-century China.
Lubrication plays a crucial role in reducing friction for transporting heavy objects, from moving a 60-ton statue in ancient Egypt to relocating a 15,000-ton building in modern society. Although in China spoked wheels appeared ca. 1500 B.C., in the 15th and 16th centuries sliding sledges were still used in transporting huge stones to the Forbidden City in Beijing. We show that an ice lubricatio...
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0019-1035/$ see front matter 2012 Elsevier Inc. A doi:10.1016/j.icarus.2012.01.016 ⇑ Corresponding author. E-mail address: [email protected] (D.G. Korycan We use recent hydrodynamical results (Kraus, R.G., Senft, L.G., Stewart, S.S. [2011]. Icarus, 214, 724–738) for the production of water vapor by hypervelocity impacts on ice targets to assess which present-day major satellites of Jupiter, Sat...
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in the early days of aviation, at the advent of thermal ice protection system development, aircraft designers believed that in fighting in-flight icing, the critical variables were the mass of supercooled water that an airplane would transit and the temperature. The measure of mass is liquid water content (LWC). Droplet size of supercooled water, which influences potential icing severity, is me...
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ژورنال
عنوان ژورنال: Europhysics News
سال: 2013
ISSN: 0531-7479,1432-1092
DOI: 10.1051/epn/2013101