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1.2.3 Mechanical methods of contraception

While hormone-containing pills represent a very sophisticated kind of contraceptive, mechanical contraceptives are a straightforward idea: they act by preventing sperm and egg from meeting. Mechanical contraceptives in their simplest form have been around since before Roman times; some are shown in Figure 4. The earliest ‘penis protectors’ were allegedly used less for contraception than as protection against disease, and as a badge of rank.

Author(s): The Open University

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1.3.4 Sense of timelessness

In Sabom’s study, everyone described their near-death experience as if it had occurred in a timeless dimension: people were unable to make any judgement about how long the experience lasted. ‘There was no measurement of time. I don’t know if it was a minute or five or ten hours’, commented one.


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2.1 Introduction

X-ray imaging is probably the best known and most widely used of the imaging techniques we will cover. Not only are X-rays the longest established means of producing images of the internal structure of the body, but X-ray imaging is also the workhorse technique for all radiology departments.

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