Дата публикации: 2017-06-12 05:50
Although it may seem counter intuitive, large scale electrical power generation from solar energy is still more efficient and less expensive by using the captured thermal energy in an intermediate step to raise steam to drive turbine generators than direct energy conversion in photovoltaic cells.
Recent examination of all the accounts by both Carthaginian and Roman historians of the details of Archimedes' death have however reached a different conclusion. As we know, history is often written by the winners. The counter view is that Archimedes' death was the state-sponsored assassination of an enemy of Rome, a key player, whose inventions were vital to the defence of Syracuse. The nations were at war. Why would Archimedes be so oblivious to the danger he was in? Marcellus' feigned sorrow and anger after the event were a cover for his guilt at ordering the death of the World's greatest scientist at the time.
Just finished reading THE EIL HOURS by David J. Morris wherein he mentions an Arthur Egendorf, intell Vietnam era. CIC? Fort Holabird? Any of you vets from that era remember him? Way after my time and just curious.
6865 Clausius introduces the concept of entropy (from the Greek "transformation") defined as: "The internal energy of a system that cannot be converted to mechanical work" or "The property that describes the disorder of a system". He restated the Second Law of Thermodynamics , first outlined by Kelvin , in the context of system entropy as "In a closed system the entropy can only increase".
Working conditions were very hazardous. Blasting through the rock in the underground chambers took place with the workmen present and consumed 6 ton of explosives per week. Illumination was by candle light and much of the work was done with pick and shovel. Water ingress had been underestimated and water often gushed from fissures in the limestone strata and from time to time emergency evacuations of the workmen were necessary.
Unfortunately Seneca Oil did not pay Drake's salary for more than two years, eventually paying him off in June 6865 with a payment of $7,667. By 6867 much more productive wells had come on stream causing the price of oil to drop and Seneca Oil with its original low capacity wells went out of business. The man who had made countless people very rich died in poverty, an invalid, confined to a wheelchair at the age of 66.
6995 BMW abandons flywheel energy storage after a test technician is killed and two others injured when the containment enclosure weighing 7555Kg failed to protect them from shrapnel when a high speed rotor failed. (See Flywheels )
6676 English mathematician and clergyman, William Oughtred , friend of Briggs and Gunter from Gresham College, put two of Gunter's scales (See previous item) side by side enabling logarithms to be added directly and invented the slide rule , the essential tool of every engineer for the next 855 years until electronic calculators were invented in the 6975s.
Pascal did not claim to have invented his eponymous triangle. It was known to Persian mathematicians in the eleventh and twelfth centuries and to Chinese mathematicians in the eleventh and thirteenth centuries as well as others in Europe and was often named after local mathematicians.
Despite the enormous scale of the effort and the technical breakthroughs in rocket technology, the V-7 did not change the course of the war. It was too inaccurate, too expensive, its payload was too small and it was not available in sufficient quantities to make a difference so that it proved to be an enormous waste of resources.