systems of equations
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Conscious of the Present; Conscious of the Past: Language (cont.); Vision and Memory
Yale / Psychology
This lecture finishes the discussion of language by briefly reviewing two additional topics: communication systems in non-human primates and other animals, and the relationship between language and thought. The majority of this lecture is then spent on introducing students to major theories and discoveries in the fields of perception, attention and memory. Topics include why we see certain visual illusions, why we don't always see everythi...more
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Is the NHS medieval? Is this an insulting claim to make? Insulting to modern hospitals or those of the Middle Ages?Professor William Ayliffe considers modern health reform from the perspective of Tudor medical practice. He provides an overview of some of London's most important mediveval hospitals, including St Bartholomew's, St Thomas' and St Mary's Bethlem, and compares our own healthcare systems with those of the Tudors, in terms of cle...more
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Musk talks about how there's no one area where costs were reduced in space travel, rather it was every decision across the board. The focus was on simplicity--and simplicity reduces costs. For example, fewer components means fewer components to repair, and to purchase, as well as to test. The avionics vehicles communicate via ethernet--while not novel, it is unheard of, compared to other systems that use cables, he says. In addition, overh...more
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Options introduce an essential nonlineary into portfolio management. They are contracts between buyers and writers, who agree on exercise prices and dates at which the buyer can buy or sell the underlying (such as a stock). Options are priced based on the price and volatility of the underlying asset as well as the duration of the option contract. The Black-Scholes options pricing model is one of the most famous equations in finance and off...more
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February 11, 2009 lecture by Jefferson Tester for the Woods Energy Seminar (ENERGY301). In his talk "A Pathway for Widespread Utilization of Geothermal Energy--the Roles of Multi-scale Resource and Technology Research and Systems Analysis," Tester talks about the benefits and challenges of harnessing geothermal energy, and he asserts that it is a large resource that complements solar and wind energy and is both carbon free and scalable.
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Systems consisting of pendulums and springs can freely oscillate at their natural frequencies (also called normal modes). When we expose a system to a wide spectrum of frequencies, the response will be very large at the normal mode frequencies (resonances) of that system. Examples include musical instruments (standing waves on violin strings and pressure waves in wind instruments), and torsional standing waves on a bridge driven by strong winds.
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This lecture explains what an economic model is, and why it allows for counterfactual reasoning and often yields paradoxical conclusions. Typically, equilibrium is defined as the solution to a system of simultaneous equations. The most important economic model is that of supply and demand in one market, which was understood to some extent by the ancient Greeks and even by Shakespeare. That model accurately fits the experiment from the last...more
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May 16, 2008 lecture by Rob Miller for the Stanford University Human Computer Interaction Seminar (CS547). Rob Miller discusses some of the explorations into keyword programming in the web automation domain, and also in other domains such as Java development. One surprising result is that programming language syntax often has relatively little information content, and can be inferred automatically from only a handful of keywords -- allowi...more
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February 18, 2009 lecture by Brent Constanz for the Woods Energy Seminar (ENERGY301). In his talk "A Pathway for Widespread Utilization of Geothermal Energy--the Roles of Multi-scale Resource and Technology Research and Systems Analysis," Brent Constanz states that concrete is the most used product worldwide next to water and he suggests that we could safely, cheaply, and quickly store carbon dioxide in concrete at the rate of about six bi...more
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The rise of absolutism in Europe must be understood in the context of insecurity attending the religious wars of the first half of the seventeenth century, and the Thirty Years' War in particular. Faced with the unprecedented brutality and devastation of these conflicts, European nobles and landowners were increasingly willing to surrender their independence to the authority of a single, all-powerful monarch in return for guaranteed protec...more
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Geography is very important in ecology. Two major systems have been designed to model this, island biogeography and metapopulations. The idea of metapopulations is more recent, and has emerged as the dominant theory. Metapopulations are populations in multiple neighboring areas. The population of a species in any individual area may go extinct, but the metapopulation still survives. The theory of metapopulations has gained momentum in rece...more
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Jeff Raikes, group vice president of Productivity and Business Services (PBS) at Microsoft Corporation, explains his own background and how being open to opportunities helped him become the only undergraduate from the Engineering Economic Systems department at Stanford.  Plans change as opportunities arise, he says. He also recommends entrepreneurs look for a job they love.
