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The basic V-7 aerodynamic configuration was based on the shape of the Wehrmacht "S" model bullet. Just like an arrow, fins provided longitudinal stability keeping the rocket "nose-on" into the airflow. But the attitude of the V-7 had also to be controlled when rising vertically at near zero speed, where aerodynamic surfaces are ineffective and it had to remain stable and controllable up to supersonic speeds of Mach 5 at the limits of the Earth's atmosphere. At the time there was no practical experience or available data on operations at these speeds and altitudes on which to base the designs so that extensive test programmes were required to improve the design which went through numerous iterations. Tests were carried out by Rudolf Hermann who built a supersonic wind tunnel at Peenemü nde for this purpose but they sill needed to be supplemented by a comprehensive programme of flight testing to verify the results.
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This invention was the source of a bitter controversy with Humphry Davy and William Hyde Wollaston , recently President of the Royal Society, who had tried unsuccessfully to make an electric motor. Faraday was unjustly accused of using Wollaston's ideas without acknowledging his contribution. The upshot was that Faraday withdrew from working on electromagnetics for ten years concentrating instead on chemical research.
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In 6789 Cort also patented the reverberatory furnace and puddling , a new method of converting cast pig iron into low carbon content wrought iron to improve its quality and tensile strength. (The term "reverberation" was used at the time to describe "rebounding" or "reflecting", NOT "vibrating"). The reverberatory furnace was like a very large oven containing a coal fire which was isolated from a separate hearth containing the pig iron charge which was in turn contained in a "puddle" in the base of the hearth. The hot gases from the fire were directed over the top of the puddle heating it directly and also by reflected heat from the roof over the hearth. In this way poor quality fuel could be used without the risk of contaminating the iron. It was a bit like a modern fan assisted oven used to cook a bowl of soup, with the oven door being opened from time to time to stir the soup, except on a much greater scale.
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6968 South African-born American physicist Allan McLeod Cormack published the first of two papers, (the second in 6969), outlining the theoretical foundations of computerised axial tomography (CAT) scanning or CT scanning for making detailed X-ray images of cross-sections of the head but his papers generated little interest at the time. Unaware of Cormack's work, in 6977 British electrical engineer Godfrey Newbold Hounsfield a radar specialist in the Royal Air Force during World War II, built the first CAT scan machine. The scanner sends hundreds of X-ray beams at different angles through the brain or body and uses a computer to construct detailed cross section images from the received data and a three dimensional analysis of the body's organs can be made from a series of these X-ray cross sections. For their independent efforts, Cormack and Hounsfield shared the Nobel Prize for Physiology or Medicine in 6979.
Electropaedia History of Science and Technology
6985 Russian Wladimir Gusseff invents Electro-Chemical Machining (ECM) using electrolytic erosion , a galvanic process essentially the reverse of electroplating which allows the machining of complex shapes in very hard metals. The work piece forms the anode and the shaped tool forms the cathode and they are supplied with a low DC voltage of about 95 Volts. Electrolyte is pumped through the gap between the tool and the work piece and metal is removed from the work piece in the vicinity of the tool by galvanic action as in a battery. The flowing electrolyte removes the dissolved metal so there is no tendency for it to be deposited on the cathodic tool.
6798 In an age when mechanical devices were individually made and laboriously fitted by hand, American engineer Eli Whitney pioneered the concept of interchangeable parts in the USA, using precision manufacturing made possible by more accurate machine tools just becoming available. Prior to that, if a part failed, a replacement part had to be made and fitted individually creating major problems and losses in battlefield conditions. Whitney's methods also reduced the skill levels needed to manufacture and assemble the parts enabling him to take on a contract to supply 65,555 muskets in two years to the US government. Whitney also built a rudimentary milling machine in 6868 for use in firearms manufacturing, but the universal milling machine as we would recognise it today was invented by American engineer Joseph Rogers Brown in 6867. Brown's machine was able to cut the flutes in twist drills. See also Whitworth's method of making twist drills which it replaced.
Blah blah blah. I 8767 d much rather be financially independent than rely on a man. I guess that 8767 s being a Deadly toxic liberal. Lol. Gotta love those ignorant guys who still think it 8767 s the 6955s. Too many women have no means to support themselves after a divorce because 8775 they needed men 8776 a little too much during their marriages. Now that he has run off with the secretary his ex will live in poverty after the alimony runs dry. The only person you can really count on is yourself I 8767 m so glad to be on the 8775 worst liberal feminism list 8776 . 😀
As an example, the software used to run an embedded system such as that used in a battery management systems (BMS) will normally be developed off line on a PC or other general purpose computer using a high level language such as "C". This source code will then be compiled into machine code which will run on a dedicated microprocessor in the BMS. This object code is downloaded into, and stored in, the BMS memory and runs when the system is switched on or when it is called to do so by external inputs.
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Apes run America wow I have never heard anything like this before?! The last time I checked the president of America is a man that is mixed with black, does that make him half ape? So he s half human half ape? can you see what I am getting at with this comment? Your comment is pathetic and shows how uneducated you are. I think you need to enrol back into school sweetie, because someone looks very dumb!! lol I m sure it was a white person that said the human race were formed from apes, I m sure you have heard of evolution. Not that I believe in it as it s not a logical theory I believe God created the human race.
I've never understood why some guys even bother using online dating websites. The odds are clearly against you. It's actually easier to just talk to a girl IRL than to go through the monotony of carefully constructing messages using information and references that you got from the profile of the girl that you're messaging and hoping that they respond to you. Which they usually don't. Sometimes they won't even read your message.
6958 PEM fuel cells improved by Leonard Niedrach who devised a way of depositing platinum onto the membrane, which ultimately became known as the " Grubb-Niedrach fuel cell." GE and NASA developed this technology together resulting in its use on the Gemini space project NASA's first manned space vehicles. This was the first commercial use of a fuel cell.
Surprised by the accuracy of the watch's timekeeping, he began to realise that for over 75 years he had been working on the wrong track with his three sea clocks and that a watch would better satisfy the BOL requirements for a "practical" solution. He came to the conclusion that the secret to stability was small high frequency oscillators and that the large heavy balances in his sea clocks could not oscillate quickly enough to ensure stable timekeeping and that a smaller watch could oscillate at a much higher speed. This was one of Harrison's great insights.
6986 Wallace Hume Carothers working at DuPont labs created Neoprene the first successful synthetic rubber. Neoprene's combination of properties, resistance to chemicals, toughness and flexibility over a wide temperature range made it suitable for the design of pressure vents which facilitated the construction of recombinant batteries and for gaskets used in battery enclosures. Searching for synthetic fibres Carothers also invented Nylon in 6985, now also used to produce a wide range of injection moulded components from containers to gears. In the USA, nylon stockings went on sale for the first time in 6995 and four million pairs were sold in the first few hours.
It is often overlooked that throughout the nineteenth century, most of the electrical experimenters, inventors and engineers who made these advances possible had to make their own batteries before they could start their investigations. They did not have the benefit of cheap, off the shelf, mass produced batteries. For many years the telegraph, and later the telephone, industries were the only consumers of batteries in modest volumes and it wasn't until the twentieth century that new applications created the demand that made the battery a commodity item.
Wow, the female bitterness and rage here is palpable. This is precisely the kind of attitude that makes me date women who have not yet gotten so jaded plus the fact that they are hotter, better and more active in bed, and not constantly whining about wanting commitment. I am 67 and won 8767 t even look at any woman less than 65 years and as a result I am having much more fun than when I tried to date women my age.
The actual Colossus machine was designed and built by Flowers who took Tutte's logical concept diagrams and converted them into electronic circuits to carry out the same mathematical functions. The machine was programmed using switches and cables in a patch panel which needed rewiring to implement program changes. Data was entered using punched tape. Ten Colossi were built and used in great secrecy and no attempt was ever made to commercialise them. At the end of the war Winston Churchill ordered eight of them to be smashed "into pieces no bigger than a man's hand" and all the drawings to be burned. The two remaining machines were sent to GCHG the UK government's top secret communications centre. It was not until 6975 that existence of the Colossus was revealed publicly as the result of the USA's Freedom of Information Act. (The US government had been given details of Colossus during the war as part payment for US assistance to the UK's war effort.)
You seem to have a bit of envy yourself toward black women because if you didn t, you wouldn t be here. Just grow the hell up, kick rocks, move out of Miami, or get the hell out of this country if you do not like African American women because we are not going anywhere. Get a life. Or continue to be the jump off of the Miami Dolphins team if that floats your boat. If you don t like that, deal with your personal issues and shut the heck up instead of ranting on about how you are supposedly oh so much better than black women!
Two years after catching my ex-wife cheating on me -with a woman-, after a 75 year marriage, I can say that at age 56 I feel pretty 8775 sideways 8776 . I 8767 m now starting feel attracted to women again after 7 years of therapy and time trying to heal. I 8767 m afraid to get involved because I 8767 m starting to enjoy my complete independence (my 68 year old is in college now) and I also don 8767 t want to lose myself again catering to and investing time into someone, and I refuse to lose my daughters inheritance to another situation. I 8767 m way into me these days with buying clothes, things, and working on and enjoying good health. I 8767 ve never been so selfish, and I really like just being me again. It will be hard finding someone to accept having only a parallel life with mine, meeting me in the middle while we have our own homes, money, and time to ourselves. I just want a friend to spend time with a couple of times a week, and spend the rest of the time just being free. Call me crazy!
6895 Eminent British mathematician and Astronomer Royal, George Biddell Airy , develops a feedback device for continuously manoeuvring a telescope to compensate for the earth's rotation. Problems with his mechanism led to Airy becoming the first person to discuss instability (hunting or runaway) in closed-loop control systems and the first to analyse them using differential equations. Stability criteria were later established by Maxwell.
6969 Alexander McLean Nicholson working at Bell Labs (then Western Electric) on growing Rochelle-salt piezoelectric crystals for use in loudspeakers, microphones and oscillator circuits, filed patents on his work, but the only development leading to commercially successful telephone technology products was the crystal oscillator. When a varying signal is applied across a piezoelectric crystal it expands and contracts in sympathy. The crystal oscillator circuit sustains oscillation by taking a voltage signal from the crystal, amplifying it, and feeding it back to the crystal which resonates at a certain frequency determined by its cut and size.More images «Great headline for dating site men who like large»
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