In your case (and for the most part, everyone else), you host advertisements to support the service offered by you. From reading the comments, you only receive payment from the advertising companies *if* I click on an advertisement? Additionally, you say that as part of the unwritten contract of me using your service, I accept to be exposed to advertisements?
The problem with that is - I don't click on adverts. The only times I have were either by accident (which really, really annoyed me); or when I was asked to by the admin of a forum because they needed some revenue (I was
I block adverts because I find them intrusive, distracting, evil (due to tracking) and the fact that I just don't click on them. I don't own a TV; I rarely read magazines; I don't willingly listen to commercial radio; I Lovefilm DVDs; and I ad-block. I'm just not interested in being advertised to; and if you don't want me using your site (like places which have pay-walls), I'll happily go elsewhere, or just not view the content in the first place.
See, the older generations grew up with computers as these big, fragile things; you couldn't fuck around too much, otherwise something might break and it would be all your fault
My grandmother is at times quite frightened when she uses her laptop in case she 'breaks it', there have been quite a few times where she's minimised something or Windows has displayed a pop-up of some type and she's concerned to do anything in cases things go wrong.
X-rays don't bounce, they penetrate or are absorbed, so would need a two-part system (and a lead apron for the user).
Hold on. If x-rays either penetrate or are absorbed why does the user need a lead apron? Why can't they just stand behind the machine and be safe?
Scatter radiation is produced when the x-rays interact with mass (the patient) in addition to the x-ray beam being divergent; people wear lead aprons to protect against the effects of scatter radiation. I think the OP was more referring to how ultrasound is reflected from surfaces to gain an image and how x-rays have to pass through and attenuated by the patient then an image receptor is used to gain a useful image.
How many QA engineers does it take to screw in a lightbulb? 3: 1 to screw it in and 2 to say "I told you so" when it doesn't work.