Block Diagram
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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
This course serves as an introduction to the theory and practice behind many of today's communications systems. 6.450 forms the first of a two-course sequence on digital communication. The second class, 6.451, is offered in the spring. Topics covered include: digital communications at the block diagram level, data compression, Lempel-Ziv algorithm, scalar and vector quantization, sampling and aliasing, the Nyquist criterion, PAM and
Professor Diamond continues her discussion of the nervous system with a diagram of a cross section of a developing spinal cord in which she highlights the ependyma, the mantle layer, the neuronal soma, and the marginal layer. She compares the developing cord to an adult cord and discusses the ventricles, the posterior and anterior horn, and the lateral horn in the thoracic cord. After relating these to the sympathetic division of the...more
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Professor Diamond continues her discussion of the nervous system, finishing her discussion of the derivatives of the neural tube. She begins by discussing the lamina terminalis and the four ventricles, relating each to the source of their derivation and the areas of the brain in which they are found. Next, she continues her discussion of diencephalon from the last lecture and describes the roles of the thalamus and hypothalamus. After...more
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Heap Management - How Information about Allocations are Stored in the Heap
Stanford / Computer Science
Heap Management - How Information about Allocations are Stored in the Heap, Result of Freeing Memory Improperly, Actual Sizes of Heap Allocations - Nearest Power of 2, Management of Free Blocks on the Heap by Storing Addresses in the Blocks of Free Memory, Algorithms for Choosing Which Free Block to Allocate, How the Heap's Free List Can Be Updated When Memory is Freed, How Adjacent Free Blocks Are Combined To Avoid Fragmentation,...more
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In this economics-oriented lecture, Professor Shapiro introduces neoclassical utilitarianism as it was formulated by economist Vilfredo Pareto and further described by Francis Edgeworth, examining such concepts as indifference curves, transitivity, the Pareto principle, and the Edgeworth box diagram. It is revealed that the main departure of neoclassical utilitarianism from classical utilitarianism was that it did away with Bentham's...more
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Jeff Housenbold, CEO of Shutterfly, recalls how he learned that merging community with commerce was the winning ticket in business online. He recounts his days at Raging Bull, an upstart financial vehicle that knocked the larger, more established players out of the ring. It's secret? The site was bullish on building community and responsive to its users, resulting in millions of users in just a few short months. Furthermore, Housenbold...more
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It is important that chemists agree on notation and nomenclature in order to communicate molecular constitution and configuration. It is best when a diagram is as faithful as possible to the 3-dimensional shape of a molecule, but the conventional Fischer projection, which has been indispensable in understanding sugar configurations for over a century, involves highly distorted bonds. Ambiguity in diagrams or words has led to...more
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Professor Sylvia Ceyer introduces the class to crystal field theory and ligand field theories. Several terms are defined, including octahedral field splitting energy, and the lecture concludes by using the octahedral crystal field splitting diagram with a few examples.
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Finding the normal and parallel components of the gravitational force vector to determine the acceleration of a block down a frictionless inclined plane. See next video for correction on definition of normal force.
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Why work from expansion is the area under the curve of a PV-diagram.
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Professor Diamond builds on previously introduced material about the cardiac system and introduces angiology, the study of the blood vessels. To begin, she draws a diagram of the composition of the circulatory system, showing how the arteries, arterioles, capillaries differ from veins and veinules. She also explains what blood vessels are made of and their specific functions. She then details elastic arteries (those more limited in...more
