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2. AuthaGraph projection - Wikipedia

   en.wikipedia.org/wiki/AuthaGraph_projection

   An approximation of the AuthaGraph projection. AuthaGraph is an approximately equal-area world map projection invented by Japanese architect Hajime Narukawa [1] in 1999. [2] The map is made by equally dividing a spherical surface into 96 triangles, transferring it to a tetrahedron while maintaining area proportions, and unfolding it in the form of a rectangle: it is a polyhedral map projection.

3. Himalaya: Exploring the Roof of the World - Wikipedia

   en.wikipedia.org/wiki/Himalaya:_Exploring_the...

   Writing for the Washington Independent Review of Books, A.A. Bastion writes, "Keay goes out of his way to present the Asian perspective on Himālaya, including the religious beliefs that shape locals’ engagement with the area. He finds meaning in these stories and honors their role in the lives of those who live in the region, while ...

4. Concrete degradation - Wikipedia

   en.wikipedia.org/wiki/Concrete_degradation

   Example of flat piece of concrete having dislodged with corroded rebar underneath, Welland River bridge across Queen Elizabeth Way in Niagara Falls, Ontario. The expansion of the corrosion products (iron oxides) of carbon steel reinforcement structures may induce internal mechanical stress (tensile stress) that cause the formation of cracks and disrupt the concrete structure.

5. Flat roof - Wikipedia

   en.wikipedia.org/wiki/Flat_roof

   A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10°. [ 1 ] Flat roofs are an ancient form mostly used in arid climates and allow the roof space to be used as a living space or a living roof .

6. Dymaxion map - Wikipedia

   en.wikipedia.org/wiki/Dymaxion_map

   The Dymaxion map projection, also called the Fuller projection, is a kind of polyhedral map projection of the Earth's surface onto the unfolded net of an icosahedron.The resulting map is heavily interrupted in order to reduce shape and size distortion compared to other world maps, but the interruptions are chosen to lie in the ocean.

7. Tikkun olam - Wikipedia

   en.wikipedia.org/wiki/Tikkun_olam

   Tikkun olam (/ t i ˈ k uː n ʌ ˈ l ɑː m /; Hebrew: תיקון עולם \ תִּקּוּן עוֹלָם, romanized: tiqqūn ʻōlām / tikún olám, lit. 'repairing of the world') is a concept in Judaism, which refers to various forms of action intended to repair and improve the world.