|Miss NASA in Apollo 8, 1971|
1 hour ago
If the type is too small, Ctrl+ is your friend
|Hot Surface Ignitor|
Natural gas has a high ignition temperature, approximately 1163 degrees Fahrenheit. - ERPUDThat's a little warm. Paper, as we all know, thanks to Ray Bradbury, ignites at Fahrenheit 451. So our Hot Surface Ignitor (HSI) must likewise get pretty hot.
The HSI heats up to around 1,800°F to 2,500°F and glows red-hot. - The SpruceThat's almost hot enough to melt steel (2500 degree F). So what are these things made of?
In 1993, the furnace industry moved away from the standing pilot light ignition system in all furnaces. One of the most popular styles of ignition used today is a Hot Surface Igniter (HSI). The first HSI’s looked like a “fork” and were a silicon carbide material. While this type of igniter is very dependable, they are fragile. The newer style HSI is made out of Silicon Nitride, which is a more durable material. This is the type of igniter that our technicians stock on their trucks. While they are more expensive to purchase up front, you can expect a longer life out of them. - Santa Fe Air
|Failed Furnace Igniter Control Relay|
|Gifts for the Handyman|
|Steam locomotives of the Chicago & North Western Railway in the roundhouse at the Chicago rail yards (December 1942)|
|UN Building from a 1950 advertisement in Glass Digest|
Posted on by Yoani-SánchezStole this article from Generation Y. My daughter's father-in-law is a doctor working in this program, although he is in Venezuela, not Brazil. He's been there two years and has another year to go before he can return home.
14ymedio, Yoani Sanchez, Generation Y, Havana, 19 November 2018 – We saw the conflict coming. From the moment Jair Bolsonero won the elections in Brazil, Cuba’s official discourse increased in rhetoric against him and prepared public opinion for the rupture that was imminent.
Cuban doctors who stay in Brazil will be forbidden entry to the island for eight years. (14ymedio)
The straw that broke the camel’s back for the Plaza of the Revolution was the statements by the president-elect in which he warned that he would change the conditions of the agreement under which more than 8,300 physicians from Cuba work in Brazil’s Mais Medicos (More Doctors) program.
Last Wednesday, tensions escalated to their highest point when the Cuban Minister of Public Health announced that he was cancelling the contract and removing his professionals from the South American country. The official notice, read out on all of the island’s the news programs, repeated that Bolsonaro’s threats would not be tolerated but deftly ignored some of his words. Particularly those where the rightist leader insisted that the Cuban doctors should receive their full salaries and be able to bring their families to stay with them while they were in the program.
The Cuban government has made medical missions a lucrative business. With professionals deployed in more than 60 countries, the money raised by this practice is Cuba’s largest source of foreign currency, estimated to exceed $11 billion annually.
In the case of Brazil, Havana pockets 75% of the 3,300 dollar salary Brazil pays for each doctor, while the health professionals only receive a quarter of the total. On the Island, in a bank account which they do not have access to, their “Cuban” monthly salary of about 60 dollars accumulates, which they can only collect if they return to the island.
Those who leave the Mais Medicos program under their own will are considered deserters and are banned from entering Cuba for eight years. During the time the Workers’ Party (PT) was at the head of the Brazilian government, the doctors who escaped from their contracts were pursued by the Brazilian police and could be returned to the Island if they were arrested. None were allowed to bring their family members to be with them during their missions, and they were often housed in overcrowded hostels shared with other doctors, nurses and hospital technicians.
Despite so many difficulties and the low earnings, the missions were very much desired by the doctors because they were able to buy goods that are not available in Cuban markets, and to make contacts that would later allow them to return to Brazil privately, with a contract to work in some clinic.
Beyond its ability to provide healthcare for many Brazilians in the poorest areas of the country, the Mais Medicos program hid a political operation to build support for the leftist Workers’ Party and guarantee it the votes of the lower classes. It was clear that Cuba’s interest in this outcome was not going to continue with Bolsonaro in charge, thus it was only a matter of time before Castroism removed its healthcare professionals from Brazil. It only remains now to ask how many of them will actually return to the island.
The president-elect of Brazil has announced that he will grant political asylum to all Cuban doctors who request it and it is expected that a considerable number will benefit from this offer. Those who do so will lose the right to return to their homeland for many long years, they will be called traitors and, most likely, their families on the island will be under pressure. The battle of the white coats has barely begun.
|Anthem Veterans Memorial|
|X-bracing inside garage|
A Kinescope is a film recording of a television screen. It really is that simple: a film camera aimed at a TV. But why? Primarily because early videotape was unreliable, expensive, and low quality. Many early television broadcasts were recorded via Kinescope before videotapes became available. NASA used Kinescope to record live feeds from space off of video monitors. - The Unwritten RecordThe balloons themselves were pretty amazing.
Unlike Echo 1, Echo 2's skin was rigidizable, and the balloon was capable of maintaining its shape without a constant internal pressure. This removed the requirement for a long term supply of inflation gas, and meant that the balloon could easily survive strikes from micrometeoroids. The balloon was constructed from "a 0.35 mil (9 µm) thick mylar film sandwiched between two layers of 0.18 mil (4.5 µm) thick aluminum foil and bonded together." The balloon was inflated to such a level as required to slightly plastically deform the metal layers of the laminate, while leaving the polymer in the elastic range. This resulted in a rigid and very smooth spherical shell. - WikipediaI think what this means is that they used enough pressure to slightly stretch the balloon material. For a big balloon like this, you would need a great deal of pressure to stretch the whole thing. On the other hand, you have an enormous volume of gas doing the pressing, and the material is very thin (.0007 inches, less than a sheet of typing paper), so maybe they only needed a small amount of pressure. In any case they used enough pressure to stretch the aluminum so it stayed stretched (kind of like stretching a slug of aluminum into a beer can), but not so much that it ripped the mylar film.
|Morse Code Decoder|
|Flying over Paradise California|
Notice the clear view of the ground on the screen
|Picking up water to fight the Woolsey fire|
Not Paradise, but still California
|Ballot Boxes in storage|
By any objective measure, the ideological and policy disagreements between the national Democrat and Republican parties are not significant. Both accept the central tenets of domestic and foreign interventionism, both accept the federal government as the chief organizing principle for American society, and both view politics simply as a fight for control of state apparatus.Via Bayou Renaissance Man
Similarly, differences between policies actually enacted by Mr. Trump and the existing Congress and those likely to have been enacted by Mrs. Clinton and the same Congress are fairly small. While Mr. Trump alarms the Left with his tone and tenor, his actual views on taxes, spending, debt, trade, guns, immigration (the "Muslim ban" was neither) and war (unfortunately his good campaign rhetoric is largely abandoned) plainly comport with the general thrust of Clinton's neo-liberalism.
Today's ugly midterm elections are about style rather than substance, party rather than principle, and power rather than ideas. Americans do not much argue about whether we are governed by DC, and only slightly over how we are governed by DC. But we argue viciously about who governs us from DC.
|1939 Jawa 350 OHV|
|The Fifth Head of Cefberus by Gene Wolfe|