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Flattening is a measure of the compression of a circle or sphere along a diameter to form an ellipse or an ellipsoid of revolution respectively. Other terms used are ellipticity , or oblateness . The usual notation for flattening is f {\displaystyle f} and its definition in terms of the semi-axes a {\displaystyle a} and b {\displaystyle b} of ...
A conservation technician examining an artwork under a microscope at the Indianapolis Museum of Art. The conservation and restoration of books, manuscripts, documents, and ephemera is an activity dedicated to extending the life of items of historical and personal value made primarily from paper, parchment, and leather.
Using Paraloid B-48 (20 percent in acetone), the painting and its gesso layer are consolidated from the back. The object is then backed by a new cartonnage support consisting of Japanese paper (70–90 grams), linen cloth and a Planatol BB/water dilution (40 percent). The negative form of the third-dimensional object is removed mechanically.
The stem anatomy of ferns is more complicated than that of dicots because fern stems often have one or more leaf gaps in cross section. A leaf gap is where the vascular tissue branches off to a frond. In cross section, the vascular tissue does not form a complete cylinder where a leaf gap occurs.
A shocking video shows the jaw-dropping rescue of tourists trapped in a frozen lake in India. According to Reuters, the four individuals fell through frigid water at Sela Lake on Sunday.
Black Monday in the NFL, the day after the final game of the regular season, is typically a day of firings.The New England Patriots didn't wait, firing Jarod Mayo on Sunday.And while Black Monday ...
Leaf expansion is a process by which plants make efficient use of the space around them by causing their leaves to enlarge, or wither. This process enables a plant to maximize its own biomass, whether it be due to increased surface area; which enables more sunlight to be absorbed by chloroplasts, driving the rate of photosynthesis upward, or it enables more stomata to be created on the leaf ...
Accused rapist rapper Sean “Diddy” Combs hired men to patrol his parties and recruit young women for “intimate” time with him — claiming it was “an honor” to be asked, a targeted ...