In a PET scan, the injected radioactive tracer decays producing a positron. The positron annihilates with an electron to produce two coincident\(\gamma\)-photons with an energy of 511 keV, which are detected by a gantry of detectors surrounding the patient. The precision with which the system...
I kind of understand that it means seeing things with the perspective of a producer, but how do you implement it in real life? What are some habits I can do to have a producer mindset? Dislike ads? Become a Fastlane member: Subscribe today and surround yourself with winners and millionaire...
Spending more on a 4" apo would mean that I can get a true all-rounder: a scope that can take more magnification and show more detail (I think of DSOs and doubles, my #2 interest), that in a pinch can be used with satisfaction on Moon and Planet. If one of the great models pop...
3200 CPM is pretty warm, but we should remember that these lenses were on cameras in which some people left the film in for years. If they were too radioactive, the film would have fogged. The hottest Takumar I've come across is the 35mm f/2.0. Some film may have fogged. Here is ...
(another thing is the quantum universe, which is reversible, so all its states have the same entropy! Although at the moment it is nothing more than a set of mathematical models). Colloquially, this would mean that the classical universe does not have a repository of Sistates. In other ...
eligible, Kendrick again garnered eight nominations — the second-most of the night behind Beyoncé. Winning Best Rap Album forMr. Morale & the Big Steppersseemed to mean a great deal to him, as hespoke ofthe "courage and vulnerability" it took...
A.How is he B.What does he like C.What is he D.What does he look like 答案:D 74、-Could you help me put up the signs on the wall? -___. A.No problem B.I hope so C.That's all right D.That's a good idea 答案:A 75、--- The summer vacation is coming in a few days...
TV-Radio Notebook: All-Star Game not what Fox wantedHouston Chronicle
*| She finally drifted in two hours after everyone else. 在大家到齐之後两小时, 她终於姗姗来到. *| (fig 比喻) He doesn't want a career, he's just drifting. 他并不想要个固定职业, 只是碰到什麽事做什麽事. *| I didn't mean to be a teacher I sort of drifted into it. 我本来没想...
In this dazzling Christmas special, Boris Karloff does an outstanding job voicing both the surly Grinch and the omnipresent narrator. It doesn’t matter how many times you’ve seen it — watching the Grinch slither around Whoville to the tune of “You’re A Mean One, Mr. Grinch” will ...