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Snowflake. A snowflake is a single ice crystal that has achieved a sufficient size, and may have amalgamated with others, which falls through the Earth's atmosphere as snow. [1] [2] [3] Each flake nucleates around a tiny particle in supersaturated air masses by attracting supercooled cloud water droplets, which freeze and accrete in crystal form.
Wilson Bentley. Wilson Alwyn Bentley (February 9, 1865 – December 23, 1931), also known as Snowflake Bentley, was an American meteorologist and photographer, who was the first known person to take detailed photographs of snowflakes and record their features. [1] He perfected a process of catching flakes on black velvet in such a way that ...
Due to heavy snowfall, the Koga Domain was a good place to observe snowflakes. Doi Toshitsura, the fourth daimyō of Koga Domain started observing snowflakes as his hobby with his own microscope which was imported from the Netherlands, and he drew pictures and studies about snowflakes in the book. This figure collection of his is highly valued ...
The number of those square structures is a Fibonacci number. By an iterated construction of 8 square patterns around each square pattern. The Hausdorff dimension of the Fibonacci word fractal is , with the golden ratio. Generalizing to an angle between 0 and , its Hausdorff dimension is , with .
The hexagonal snowflake, a crystalline formation of ice, has intrigued people throughout history. This is a chronology of interest and research into snowflakes. Artists, philosophers, and scientists have wondered at their shape, recorded them by hand or in photographs, and attempted to recreate hexagonal snowflakes.
Snow heavily falling in Tokyo, Japan Freshly fallen snowflakes. A snowflake consists of roughly 10 19 water molecules which are added to its core at different rates and in different patterns depending on the changing temperature and humidity within the atmosphere that the snowflake falls through on its way to the ground. As a result, snowflakes ...
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The snowflake schema is a variation of the star schema, featuring normalization of dimension tables. In computing, a snowflake schema or snowflake model is a logical arrangement of tables in a multidimensional database such that the entity relationship diagram resembles a snowflake shape. The snowflake schema is represented by centralized fact ...