一页掌握 · K11 第11章 专业英语

Health effects of 3D Some viewers have(71)of headaches and eyestrain after watching 3D films. Motion sickness, in addition to other health concerns, are more easily induced by 3D presentations. One published study shows that of those who watch 3D films, nearly 55% experience varying levels of headaches, nausea and disorientation. There are two primary effects of 3D film that are(72)for human vision: crosstalk between the eyes, caused by imperfect image separation, and the(73)between convergence and accommodation, caused by the difference between an object's perceived position in front of or behind the screen and the real origin of that light on the screen. It is believed that approximately 12% of people are unable to properly see 3D(74) due to a variety of medical conditions. According to another experiment up to 30% of people have very weak stereoscopic vision preventing them(75)depth perception based on stereo disparity. This nullifies or greatly decreases immersion effects of digital stereo to them.

What is a Touch Screen? A touch screen allows user commands to be issued by(71)corresponding buttons on the screen. Since their introduction in the 1970s, touch screens have become popular for computer and media technology. Chances are, if you have used an(72)teller machine (ATM), owned a personal digital assistant (PDA), or played with the newer cell phones, you have already used touch screen technology. There are several commonly used systems that allow for touch screens to work. Each method allows for commands to be translated by the computer as a(73)of touching a certain point on the screen. Many convert the coordinates of the touch locations to specific actions to be taken by the system. One of the most common systems for touch screens is called(74). Covering the transparent panel of the screen are conductive and resistive metallic layers that have an electric current between them. When the screen is touched, the electrical current can tell the exact spot of contact and(75)the coordinates to the operating system. This is similar to how a mouse works with a computer.

What is Virtual Reality? The definition of virtual reality comes,(71), from the definitions for both 'virtual' and 'reality'. The definition of 'virtual' is near and reality is what we experience as human beings. So the term 'virtual reality' basically means 'near-reality'. This could, of course, mean anything but it usually refers to a specific type of reality(72). We know the world through our senses and(73)systems. In school we all learned that we have five senses: taste, touch, smell, sight and hearing. These are however only our most obvious sense organs. The truth is that humans have many more senses than this, such as a sense of balance for example. These other sensory inputs, plus some special processing of sensory information by our brains ensures that we have a rich flow of information from the environment to our minds. Everything that we know about our reality comes by way of our senses. In other words, our entire experience of reality is simply a(74)of sensory information and our brains sense-making mechanisms for that information. It stands to reason then, that if you can present your senses with made-up information, your perception of reality would also change in response to it. You would be presented with a version of reality that isn't really there, but from your perspective it would be perceived as(75). Something we would refer to as a virtual reality. So, in summary, virtual reality entails presenting our senses with a computer generated virtual environment that we can explore in some fashion.

what does the multimedia actually mean? (71), multimedia means two or more media. If the publisher of this book wanted to join the current hype about multimedia, he could advertise the book as using multimedia technology. After all, it contains two media: text and graphics (the figures). Nevertheless, when most people refer to multimedia, they generally mean the(72)of two or more continuous media, that is, media have to be played during some well-defined timed times interval, usually with the users(73). In practice, the two media are normally audio and video, that is, sound plus moving pictures. In the multimedia environment, we have(74)and text at the same time, we can also add the photograph, animation, good-quality sound, and full motion video. All of the technologies make computers more interesting and much(75)to use. For example, a multimedia program can play a segment of movie: a cat was playing a reel of thread, with "mewing..." The tableau can be immediately captured and pasted to a text at the side of a paragraph of words.

The beauty of software is in its function, in its internal structure, and in the way in which it is created by a team. To a user, a program with just the right features presented through an intuitive and(71)interface is beautiful. To a software designer, an internal structure that is partitioned in a simple and intuitive manner, and that minimizes internal coupling is beautiful. To developers and managers, a motivated team of developers making significant progress every week, and producing defect-free code, is beautiful. There is beauty on all these levels. Our world needs software - lots of software. Fifty years ago software was something that ran in a few big and expensive machines. Thirty years ago it was something that ran in most companies and industrial settings. Now there is software running in our cell phones, watches, appliances, automobiles, toys, and tools. And need for new and better software never(72). As our civilization grows and expands, as developing nations build their infrastructures, as developed nations strive to achieve ever greater efficiencies, the need for more and more software(73)to increase. It would be a great shame if, in all that software, there was no beauty. We know that software can be ugly. We know that it can be hard to use, unreliable, and carelessly structured. We know that there are software systems whose tangled and careless internal structures make them expensive and difficult to change. We know that there are software systems that present their features through an awkward and cumbersome interface. We know that there are software systems that crash and misbehave. These are(74)systems. Unfortunately, as a profession, software developers tend to create more ugly systems than beautiful ones. There is a secret that the best software developers know. Beauty is cheaper than ugliness. Beauty is faster than ugliness. A beautiful software system can be built and maintained in less time, and for less money, than an ugly one. Novice software developers don't understand this. They think that they have to do everything fast and quick. They think that beauty is(75). No! By doing things fast and quick, they make messes that make the software stiff, and hard to understand.