digital abstraction
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November 2, 2007 lecture by Cathy Marshall for the Stanford University Human-Computer Interaction Seminar. Most of us engage in magical thinking when it comes to the long term fate of our digital stuff. At this point, a strategy that hinges on benign neglect and lots of copies seems to be the best we can hope for. Cathy discusses four central themes of personal digital archiving and some additional challenges introduced by home computing e...more
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Introduction to programming and computer science. This course exposes students to techniques of abstraction at several levels: (a) within a programming language, using higher-order functions, manifest types, data-directed programming, and message-passing; (b) between programming languages, using functional and rule-based languages as examples. It also relates these techniques to the practical problems of implementation of languages and alg...more
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April 18, 2008 lecture by Steve Whittaker for the Stanford University Human Computer Interaction Seminar (CS547). Steve Whittaker reviews the Digital Memories vision, briefly present various studies that challenge that vision, moving on to suggest an alternative approach to the topic that is informed by cognitive science, suggesting that instead of focusing on exhaustive capture we should be designing prosthetic memory devices that are (a...more
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Wirt makes some interesting predictions about the future of digital music, digital photos, and the trends of high speed networks and increasing storage capacity. He describes a world where almost everything has a built-in hard drive for storing information, but the challenge will be keeping it all in sync.
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Wirt talks about how the convergence of technology is an interesting trend that has led to an influx of multi-functioning devices. Convergence devices save space, add convenience, and can sometimes enhance the functionality of the combined product. The Palm Treo is a great example of a convergence device and functions as a phone, handheld organizer, wireless email, text messaging, web browsing and even a digital camera.
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May 30, 2008 lecture by Hiroshi Ishii for the Stanford University Human Computer Interaction Seminar (CS547). Tangible Bits seeks to realize seamless interfaces between humans, digital information, and the physical environment by giving physical form to digital information, making bits directly manipulable and perceptible. Their goal is to invent new design media for artistic expression as well as for scientific analysis, taking advantage...more
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Why print photos when the blog is king? And who prints photos in the age of digital cameras? Shutterfly CEO Jeff Housenbold explains how an old-fashioned business like photo printing is surviving - and thriving - in electronic media. He also discusses how technological innovations are reducing environmental resources in the photo industry landscape.
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This course is the second of a two-term sequence. The focus is on coding techniques for approaching the Shannon limit of additive white Gaussian noise (AWGN) channels, their performance analysis, and design principles. After a review of Principles of Digital Communication I and the Shannon limit for AWGN channels, the course begins by discussing small signal constellations, performance analysis and coding gain, and hard-decision and soft-d...more
