As early as December 1945, politicians worried about the possibility of smuggling nuclear weapons into the United States, though this was still in the context of a battle between the superpowers of the Cold War. Congressmen quizzed the "father of the atomic bomb," J. Robert Oppenheimer, about the possibility of detecting a smuggled atomic bomb: Sen. Millikin: We... have mine-detecting devices, which are rather effective... I was wondering if anything of that kind might be available to use as a defense against that particular type of use of atomic bombs. Dr. Oppenheimer: If you hired me to walk through the cellars of Washington to see whether there were atomic bombs, I think my most important tool would be a screwdriver to open the crates and look. I think that just walking by, swinging a little gadget would not give me the information. This sparked further work on the question of smuggled atomic devices during the 1950s. Discussions of non-state nuclear terrorism among expe...
Circuits and components can be divided into two groups: analog and digital. A particular device may consist of circuitry that has one or the other or a mix of the two types. An important electronic technique in both analog and digital electronics involves the use of feedback. Among many other things this allows very linear amplifiers to be made with high gain, and digital circuits such as registers, computers and oscillators. Analog circuits edit Most analog electronic appliances, such as radio receivers, are constructed from combinations of a few types of basic circuits. Analog circuits use a continuous range of voltage or current as opposed to discrete levels as in digital circuits. The number of different analog circuits so far devised is huge, especially because a 'circuit' can be defined as anything from a single component, to systems containing thousands of components. Analog circuits are sometimes called linear circuits although many non-linear effects are used in analog...
India Republic Day -- This year's grand celebration will not be the same as it is at last that it will be held among the ongoing coronavirus pandemic, which includes claimed many lives across the country. India is celebrating its 72nd Republic Day on Tuesday, but this year's grand parade will not be similar to it is for the first time that it will end up being held amid the ongoing coronavirus pandemic, which has claimed numerous lives across the country. Burj Khalifa Lights up With Tricolour to Celebrate India's 72nd Republic Day time After more than 5 decades, the country's 72nd R-Day celebration will have no chief guests. British Prime Minister Boris Johnson was due to maintain New Delhi as the key guest at the annual celebration to mark the Republic Day but he had for you to call off the visit to provide for the domestic crisis let loose by the emergence of a brand new, deadlier variant of coronavir us in the UK at the end of last year. Furthermore, gravity-defyin...
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