Tapa wall drapery painted with animal clan emblems, from the Teluk Jos Sudarso (Humboldt Bay) area, elipsis
Learn more about bark painting with a free trial on Britannica.com.
Bark beetle (Dendroctonus valens)
Learn more about bark beetle with a free trial on Britannica.com.
In woody plants, tissues outside of the vascular cambium. The term is also used more popularly to refer to all tissues outside the wood. The inner soft bark is produced by the vascular cambium; it consists of secondary phloem (food-conducting) tissue whose innermost layer transports food from the leaves to the rest of the plant. The layered outer bark contains cork and old, dead phloem. The bark is usually thinner than the woody part of the stem or root.
Learn more about bark with a free trial on Britannica.com.
BARK (Binär Aritmetisk Relä-Kalkylator, Swedish for "Binary Arithmetic Relay Calculator") was an early electromechanical computer. BARK was built using standard phone relays, implementing a 32-bit binary machine and could perform addition in 150 ms and multiplication in 250 ms. It had a memory with 50 registers and 100 constants. It was later expanded to double the memory. Howard Aiken stated in reference to BARK "This is the first computer I have seen outside Harvard that actually works."
BARK was developed by Matematikmaskinnämnen a few years before BESK. The machine was built with 8000 standard phone relays, 80 km of cable and with 175,000 soldering points. It was completed in February 1950 at a cost of 400.000 Swedish kronor, became operational on April 28, and was taken offline on September 22 1954. The engineers on the team led by Conny Palm were Harry Freese, Gösta Neovius, Olle Karlqvist, Carl-Erik Fröberg, G. Kellberg, Björn Lind, Arne Lindberger, P. Petersson and M. Wallmark.