Hydraulic Ram
A hydraulic ram is a cyclic water pump powered by hydropower. It functions as a hydraulic transformer that takes in water at one hydraulic head and flow-rate, and outputs water at a different hydraulic-head and flow-rate. The device utilizes a phenomenon called stagnation pressure, also known as water hammer, that is based on Bernoulli’s principle. In operation, a portion of the input water that powers the pump is lifted to a point higher than where the water originally started. The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower, and a need for pumping water to a destination higher in elevation than the source. In this situation, the ram is often useful, since it requires no outside source of power other than the kinetic energy of water.
- Inlet – drive pipe
- Free flow at waste valve
- Outlet – delivery pipe
- Waste valve
- Delivery check valve
- Pressure vessel
Voynich Manuscript
The Voynich manuscript is a mysterious illustrated book written in an indecipherable text. It is thought to have been written between approximately 1450 and 1520. The author, script and language of the manuscript remain unknown.
Over its recorded existence, the Voynich manuscript has been the object of intense study by many professional and amateur cryptographers, including some top American and British codebreakers of World War II fame all of whom failed to decrypt a single word. This string of failures has turned the Voynich manuscript into a famous subject of historical cryptology, but it has also given weight to the theory that the book is simply an elaborate hoax — a meaningless sequence of arbitrary symbols.
Hydraulic Jump! Jump! Jump! Jump! Jump around!
With apologies to House of Pain…
A hydraulic Jump is a phenomenon in the science of hydraulics, frequently observed in open channel flow. When liquid at high velocity discharges into a zone of lower velocity, a rather abrupt rise (a step or standing wave) occurs in the liquid surface. The rapidly flowing liquid expands (which in an open channel appears as an increase in elevation), converting some of the initial kinetic energy of flow into a lower kinetic energy, an increased potential energy and the remainder to irreversible losses (turbulence which ultimately coverts the energy to heat).
Here’s a good example of a hydraulic jump, Minneapolis’ very own St. Anthony falls. That jump in the water is (probably) not from a ramp at the bottom of the falls, but just the smooth, laminar flow of the water being disturbed and turning into a chaotic flow, which causes an increase in height.
Hieronymus Bosch
Hieronymus Bosch was a prolific Early Netherlandish painter of the fifteenth and sixteenth centuries. Many of his works depict sin and human moral failings. Bosch used images of demons, half-human animals and machines to evoke fear and confusion to portray the evil of man. The works contain complex, highly original, imaginative, and dense use of symbolic figures and iconography, some of which was obscure even in his own time. He is said to have been an inspiration for the surrealist movement in the twentieth century.
Borad
On my way home one day, I spotted this amusing sign warning of an impending bus route change:
Teach yourself Celsius temperatures
Setup two weather doc-apps, one in Fahrenheit and one in Celsius. Genius!
Northwest Angle
The Northwest Angle, known simply as the Angle by locals, and coterminous with Angle Township, is a small part of northern Lake of the Woods County, Minnesota that is the only part of the United States outside of Alaska that is north of the 49th parallel.
christianity denis image link martyrs Tenacious-D trivia wikipedia
by Layne
leave a comment
And on the bass…Denis!
- “Saint Denis of Paris is a Christian martyr and saint. In the third century, he was bishop of Paris.”
- Around 250 CE, “Denis, having irritated the tempers of heathen priests for his many conversions, was executed by beheading on the highest hill near Paris (now Montmartre), which was likely to have been a druidic holy place. The martyrdom of Denis and his companions gave it its current name, which in Old French means “mountain of martyrs”. According to the Golden Legend, after his head was chopped off, Denis picked it up and walked several miles, preaching a sermon the entire way.”
- After his death, “…the name Saint Denis became the war-cry of the French armies.”
- “In traditional Catholic practice, Saint Denis is honored as one of the Fourteen Holy Helpers. Specifically, Denis is invoked against diabolical possession and headaches.”
- “Denis’ headless walk has led to his being depicted in art decapitated and dressed as a bishop, holding his own mitred head in his hands. Handling the halo in this circumstance offers a unique challenge for the artist. Some put the halo where the head used to be; others have Saint Denis carrying the halo along with the head.”
- Played drum, bass, keys, did-ah-lit, duhert, dig-a-du-dit-dit with American rock band duo Tenacious D on their first world tour. They did not play at any of the following venues: Edinburgh, Scotland; Hong Kong, China; Tijuana, Mexico