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MyProgrammingLab should only be purchased when required by an instructor. Introduction to Computing and Programming in Python is a uniquely researched and up-to-date volume that is widely recognized for its successful introduction to the subject of Media Computation.
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[PDF Download] Introduction to Computing and Programming in Python A Multimedia Approach (2nd
This content was uploaded by our users and we assume good faith they have the permission to share this book. If you own the copyright to this book and it is wrongfully on our website, we offer a simple DMCA procedure to remove your content from our site. Start by pressing the button below! Backwards sounds. Changing the frequency of sounds. V Files. Alan Perlis. The File Picker. Picking, making, and showing a picture. One cycle of the simplest sound, a sine wave.
The distance between peaks in ripples in a pond are not constant—some gaps are longer, some shorter. The note A above middle C is Hz. Some synthesizers using triangular or sawtooth or square waves. Sound editor main tool. Viewing the sound signal as it comes in. Viewing the sound in a spectrum view. Viewing the sound signal in a sonogram view. Area under a curve estimated with rectangles. A sound recording graphed in the MediaTools.
The sound editor open menu. A sound opened in the editor. Exploring the sound in the editor. Comparing the graphs of the original sound top and the louder one bottom. FFT of the Hz sound. FFT of the combined sound. The Hz square wave top and additive combination of square waves bottom.
An example matrix. RGB triplets in a matrix representation. Directly modifying the pixel colors via commands: Note the small yellow line on the left.
Using the MediaTools image exploration tools. The original picture left and red-reduced version right. Original left and blue erased right. Lightening and darkening of original picture. Negative of the image. Color picture converted to greyscale. However, most educated people want to use a computer, and the task that they most want to do with a computer is communicate.
Variety is good. The same idea is framed in multiple ways. Playing with programming can be and should be enormous fun. Longer examples look look like this: def helloWorld : print "Hello, world! Jason and David took JES the next steps, improving installation, debugging, and process support. Mark and Matt built a great many of the example programs.
Most of the clip art is used with permission from the Art Explosion package by Nova Development. This exactness is part of why computers have radically changed so much of how science is done and understood. It may sound funny to call programs or algorithms a recipe, but the analogy goes a long way.
Computer science theoreticians worry about the fastest and shortest recipes, and the ones that take up the least amount of space you can think about it as counter space — the analogy works.
Software engineers worry about how large groups can put together recipes that still work. Does it matter whether a recipe uses metric or English measurements? Ever wonder why ships at sea measure their speed in knots? Why not use things like meters per second? The study of computer science units is referred to as data structures.
How about intelligence? Can we write a recipe that can think and how would you tell if you got it right? Computer scientists who work in graphics are mostly concerned with recipes that produce pictures, animations, and even movies. Computer scientists who work in computer music are mostly concerned with recipes that produce sounds often melodic ones, but not always.
Think about the World Wide Web. Why would one section of the Web get slower at some point? For example, how ants forage for food or how termites make mounds can also be described as something that just happens when you have lots of little programs doing something simple and interacting.
The recipe metaphor also works on another level. Everyone knows that some things in recipe can be changed without changing the result dramatically. You can always increase all the units by a multiplier to make more. You can always add more garlic or oregano to the spaghetti sauce.
But there are some things that you cannot change in a recipe. If the recipe calls for baking powder, you may not substitute baking soda.
Similarly, for software recipes. There are usually things you can easily change: The actual names of things though you should change names consistently , some of the constants numbers that appear as plain old numbers, not as variables , and maybe even some of the data ranges sections of the data being manipulated. But the order of the commands to the computer, however, almost always has to stay exactly as stated. Computer scientists specify their recipes with programming languages.
Others are more obscure, like Squeak and T. The problem is that natural languages evolved the way that they did to enhance communications between very smart beings, humans. When was the last time you told someone how a videogame like Doom or Quake or Super Mario Brothers worked in such minute detail that they could actually replicate the game say, on paper?
Python is a fairly popular programming language, used very often for Web and media programming. The web search engine Google is mostly programmed in Python. The same algorithm coded in C and in Python will probably be faster in C.
Python is normally implemented in the programming language C. Jython is Python implemented 1. Jython lets us do multimedia that will work across multiple computer platforms.
What does a computer know how to do? What can we tell the computer to do in the recipe? They really only know about numbers. Actually, even to say that computers know numbers is a myth, or more appropriately, an encoding. Computers are electronic devices that react to voltages on wires.
We group these wires into sets like eight of these wires are called a byte and one of them is called a bit. If a wire has a voltage on it, we say that it encodes a 1. If it has no voltage on it, we say that it encodes a 0.
Using the binary number system, we can interpret this byte as a decimal number Figure 1. Everything that a computer is working with at a given instant is stored in its memory. That means that everything that a computer is working with is encoded in its bytes: JPEG pictures, Excel spreadsheets, Word documents, annoying Web pop-up ads, and the latest spam email. A computer can do lots of things with numbers. Otherwise, continue on to the next step.
The computer is an amazing calculator. But what makes it useful for general recipes is the concept of encodings.
Computer Science Idea: Computers can layer encodings Computers can layer encodings to virtually any level of complexity. Numbers can be interpreted as characters, which can be interpreted in sets as Web pages, which can be interpreted to appear as multiple fonts and styles.
If one of these bytes is interpreted as the number 65, it could just be the number This interpretation will include whatever you typed and loaded from the program area as well. The name print is an important one to know. It also knows how to recognize strings lists of characters that are started and ended with " quote marks. If it sees you using integers, it thinks you want an integer result from your expressions.
Introduction to Computing and Programming in Python - a Multimedia Approach, 4th Edition
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Introduction to Computing Programming in Java: A Multimedia Approach
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Introduction to Computing and Programming in Python, A Multimedia Approach, 2nd Edition
ГЛАВА 59 Сьюзан протянула руку, и коммандер Стратмор помог ей подняться по лестнице в помещение шифровалки. А перед глазами у нее стоял образ Фила Чатрукьяна, его искалеченного и обгоревшего тела, распростертого на генераторах, а из головы не выходила мысль о Хейле, притаившемся в лабиринтах шифровалки. Правда открылась со всей очевидностью: Хейл столкнул Чатрукьяна.
Похоже, он принадлежал Филу Чатрукьяну. - Ты мне не веришь. Мужчины начали спорить.
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Какого черта! - подумал. - Что я делаю здесь в пять вечера в субботу. - Чед? - В дверях его кабинета возникла Мидж Милкен, эксперт внутренней безопасности Фонтейна. В свои шестьдесят она была немного тяжеловатой, но все еще весьма привлекательной женщиной, чем не переставала изумлять Бринкерхоффа. Кокетка до мозга костей, трижды разведенная, Мидж двигалась по шестикомнатным директорским апартаментам с вызывающей самоуверенностью. Она отличалась острым умом, хорошей интуицией, частенько засиживалась допоздна и, как говорили, знала о внутренних делах АНБ куда больше самого Господа Бога. Черт возьми, - подумал Бринкерхофф, разглядывая ее серое кашемировое платье, - или я старею, или она молодеет.
Стекла очков блеснули, и его пальцы снова задвигались в воздухе. Он, как обычно, записал имена жертв. Контакты на кончиках пальцев замкнулись, и на линзах очков, подобно бестелесным духам, замелькали буквы. ОБЪЕКТ: РОСИО ЕВА ГРАНАДА - ЛИКВИДИРОВАНА ОБЪЕКТ: ГАНС ХУБЕР - ЛИКВИДИРОВАН Тремя этажами ниже Дэвид Беккер заплатил по счету и со стаканом в руке направился через холл на открытую террасу гостиницы. - Туда и обратно, - пробормотал. Все складывалось совсем не так, как он рассчитывал. Теперь предстояло принять решение.
Я вовсе не хочу с ней переспать. Мне нужно с ней поговорить. Ты можешь помочь мне ее найти. Парень поставил бутылку на стол. - Вы из полиции.
Фонтейна эти слова озадачили. - Вы хотите сказать, что Танкадо не искал глазами Халохота. - Да, сэр.
Она помахала ему рукой. - Подождите, мистер. Ну что еще? - застонал .
- У Стратмора стол ломится от заказов. Вряд ли он позволил бы ТРАНСТЕКСТУ простаивать целый уик-энд. - Хорошо, хорошо. - Мидж вздохнула. - Я ошиблась.
Он с трудом открыл глаза и увидел первые солнечные лучи. Беккер прекрасно помнил все, что произошло, и опустил глаза, думая увидеть перед собой своего убийцу. Но того человека в очках нигде не .