Weeping beech measure in length. Flowers appear in the spring and are inconspicuous. The beechnuts sit in a thin spiny husk and are less than 5 cm in diameter. The triangular beech nuts are popular in autumn with birds, mice and squirrels. The green leaves become copper-toned in the fall. In winter the skeleton of the silvery stem with its branches remains attractive. The purple pigment in the leaves acts like a sunscreen to protect its new leaves, which is particularly important for plants that grow at high altitudes where the sun is fierce. The tree is not native to North America
Photonics mast Photonics mast A photonics mast (or "optronics mast") is a sensor on a submarine which functions similarly to a periscope without requiring a periscope tube, thus freeing design space during construction and limiting risks of water leakage in the event of damage. A photonics mast replaces the mechanical, line-of-sight viewing system with digital equipment, similar to a digital camera array, and it has fewer locational and dimensional constraints than a traditional periscope. Unlike a periscope, it need not be located directly above its user, and it requires only a small pressure hull penetration for cabling. This allows the photonics mast