Reading Test 17

Ever wished you could find a pair of shoes to match your outfit? Fancy a pizza but don't want to go out or wait for your delivery service to arrive? Simple. All you need is a 3D home printer. Whilst admittedly not yet mainstream technology, it is only a matter of time until the 3D printer becomes as much a part of the domestic furniture as the statutory TV or the washing machine. Currently, however, the technology remains firmly in the province of geeks and gadget lovers. The design of the 3D home printer is nevertheless refreshingly simple. Its components are relatively few, and could theoretically be assembled by anyone with a rudimentary knowledge of mechanics and technological know-how. The 3 main elements of the printer are a metal framework which contains the mechanical part of the printer, a printer control board and a PC. The PC is connected via USB to the printer control board, which in turn is connected to the framework of the printer and attached to the side of the latter. A plastic filament of around 3m m in diameter feeds into the printer from an external source, connecting to the extruder motor inside the printer. During printing, the controlled movement of the extruder motor ensures the correct volume of plastic is used. The extruder motor in turn is connected to a heated extruder or 'hot end' that heats the plastic filament during printing. As the heated plastic emerges or is 'extruded' to use the correct terminology, it cools and is arranged in layers to create a solid 3D model. In order to move the extruder about in 3D space, there are 3 axes, each…

Nanotechnology has been hailed by many as being a twentieth-century miracle of science. Essentially, nanotechnology, a term derived from Greek, translating literally as 'dwarf technology' is, as the origin of its name suggests, engineering at the atomic level. Scientists work with particles of substances known as 'nanoparticles' which may measure no more than 1 nanometre or a billionth of a metre. That's around 40,000 times smaller than the width of the average human hair. Whilst some of these substances derived from carbon compounds are manufactured, others, such as metals, are naturally-occurring or arise as a by-product of another process e.g. volcanic ash or smoke from wood burning. What makes these substances of such scientific interest is that their minute size facilitates medical and technological processes that would otherwise be impossible. It may be something of a revelation for many of us to learn that nanotechnology - or its concept - is far from cutting-edge science. In fact, nanotechnology as an idea was first referred to in an influential lecture by American physicist, Richard Feynman, as far back as 1959. During the lecture, entitled 'There's Plenty of Room at the Bottom', Feynman outlined the basic concept of nanotechnology. Individual atoms and molecules, he claimed, could in the future be created by a physical process. Such a process, he envisaged, would involve the building of a set of precise tools to build and operate another proportionally smaller set. The building of increasingly minute tools at the microscopic level would in turn produce…

Driverless cars may be set to become reality. At least that is, if the executives behind the taxi app, Uber, are to be believed. Currently, Uber is taking its biggest steps yet towards a driver-free world, launching the Uber Advanced Technologies Centre in Pittsburgh. The ultimate goal of this institution is to 'do research and development, primarily in the areas of mapping and vehicle safety and autonomy technology'. To date, Uber has provided a chauffeur-driven taxi service for American clients. Venturing into the realms of driverless cars is therefore a new direction which will require massive investment. It is indeed a huge leap of faith on Uber's part, since technology has yet to catch up with the idea of a fully autonomous vehicle. On the as well as stay in lane, and maintain a steady cruising seed. In a patchwork fashion such cars could eventually build up to almost full automation and Uber believes that car owners will readily embrace the idea of driverless taxis. In Uber's eyes, current car owners only stand to gain by the introduction of such technology. Hiring a driverless cab means that the client does not have to pay for the cost of the driver in the cab fee. The only cost incurred by clients is for fuel, plus wear and tear. It is certainly an attractive proposition. Uber stands to benefit, too, since employees currently working as taxi drivers will be removed from the company's payroll. Apparently for car drivers and Uber, it is a win-win situation. Not everyone will benefit however from this technology, the car industry being an obvious example. Not…