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"IN 1999, legendary theoretical physicist Hans Bethe delivered three lectures on quantum theory to his neighbors at the Kendal of Ithaca retirement community (near Cornell University). Given by Professor Bethe at age 93, the lectures are presented here as QuickTime videos synchronized with slides of his talking points and archival material. Intended for an audience of Professor Bethe's neighbors at Kendal, the lectures hold appeal for exp...more
Analysis and optimized design of monolithic operational amplifiers and wide-band amplifiers; methods of achieving wide-band amplification, gain-bandwidth considerations; analysis of noise in integrated circuits and low noise design. Precision passive elements, analog switches, amplifiers and comparators, voltage reference in NMOS and CMOS circuits, Serial, successive-approximation, and parallel analog-to-digital converters. Switched-...more
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
"This the seventeenth lecture in the ""Lectures on Human Capital"" series by Gary Becker. This series of lectures recorded during the Spring of 2010 are from ECON 343 - Human Capital, a class taught every year by Gary Becker at the University of Chicago. In this class, Becker expounds upon the theory of Human Capital that he helped create and for which he won the Nobel Prize. Please see attached lecture notes, video annotations, and readin...more
We see how to improve upon Dijkstra's algorithm for the SSSP problem in planar graphs with non-negative edge lengths. As an important technique, we revisit the concept of an r-division.In the previous lecture, we saw how to recursively separate a planar graph into small pieces with small total boundary. In this lecture, we see how to obtain a so-called r-division, where each individual piece is guaranteed to have small boundary (as opposed...more
Hunter-gatherer populations were much less dense than later agriculturalists. The variety of their food supply protected them from crop failures and their sparseness reduced the spread of infectious diseases. Hunter-gatherers were healthier and worked less than early agriculturalists. Why didn't their numbers increase up to the same level of Malthusian misery? Their numbers may have been limited by violence between groups. Agriculture is m...more
In this lecture, Professor Holloway discusses the New Negro mentality, a new black consciousness forged out of political and economic frustration and the cultural shocks of the Great Migration. The New Negro ideology was articulated on a wide scale after World War I, when the promises of democracy at home went unfulfilled. Marcus Garvey best articulated this new consciousness through his Universal Negro Improvement Association (UNIA), the ...more
In this lecture, Professor Holloway documents the "Great Migration," beginning in the first decade of the twentieth century and continuing with increasing pace until the mid-1920s. During this time, black Americans relocated from the rural South to the urban North. This general shift in the population marked a moment of self-determination for African Americans, demonstrating that they were prepared to leave behind the lives they had made i...more
SARS, avian influenza and swine flu are the first new diseases of the twenty-first century. They are all diseases of globalization, or diseases of modernity, and while relatively limited in their impact, they have offered dress-rehearsals for future epidemics. As information about SARS spread internationally in 2002, in spite of China's campaign of silence, the global response had a curiously twofold character: on one hand, the mobilizatio...more
Air is able to hold a limited amount of water vapor, and that amount depends on the temperature of the air. When this saturation vapor pressure is exceeded, liquid water begins to condense and clouds form. There are several different types of clouds, some which rain and others which do not, and each with characteristics specific to it. Vortices are a particular type of cloud phenomenon in which there is a low pressure anomaly in the center...more
Professor Donald Kagan explains why people should study the ancient Greeks. He argues that the Greeks are worthy of our study not only because of their vast achievements and contributions to Western civilization (such as in the fields of science, law, and politics) but also because they offer a unique perspective on humanity. To the Greeks, man was both simultaneously capable of the greatest achievements and the worst crimes; he was both g...more
Detecting fixed points in von neumann's simple random number generator. data structure revision. using trees. implementing a very simple tree. Talk about the anagram lab exercise. Improving the UNSW 89019 microprocessor. CISC and RISC design. Using memory segments to be able to address more memory. The bicycle wheel puzzle. Simulation - a neat and simple way to solve complicated problems when you can't be bothered to use/can't rely upon...more
