data structure
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Introduction to the Kawa Development Environment: Evaluation of Expressions
Stanford / Computer Science
Introduction to the Kawa Development Environment: Evaluation of Expressions, Loading Function Definitions From a .Scm File, Mapping Arbitrary Unary Functions Over Lists in Scheme Using the Map Operation, Mapping List Functions (Car, Cdr) Over Lists of Lists, Using Mapping Functions with More than One Input by Passing Multiple Lists into Map, Implementing the Unary Version of Map Using Recursion, Apply, Which Allows You to Specify a Functio...more
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This lecture completes the first half of the semester by analyzing three functional groups in terms of the interaction of localized atomic or pairwise orbitals. Many key properties of biological polypeptides derive from the mixing of such localized orbitals that we associate with "resonance" of the amide group. The acidity of carboxylic acids and the aggregation of methyl lithium into solvated tetramers can be understood in analogous terms...more
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The most prominent chemist in the generation following Lavoisier was Berzelius in Sweden. Together with Gay-Lussac in Paris and Davy in London, he discovered new elements, and improved atomic weights and combustion analysis for organic compounds. Invention of electrolysis led not only to new elements but also to the theory of dualism, with elements being held together by electrostatic attraction. Wöhler's report on the synthesis of urea re...more
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Professor Mazzotta continues his discussion of the Heaven of the Sun (Paradise X-IV), where the earthly disputes between the Franciscan and Dominican orders give way to mutual praise. The tribute St. Thomas pays to the founder of the Franciscan order (Paradise XI) is repaid by St. Bonaventure through his homage to St. Dominic (Paradise XII). The chiasmic structure of these cantos is reinforced by the presence of Nathan and Joachim of Flora...more
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This lecture traces the development of elemental analysis as a technique for the determination of the composition of organic compounds beginning with Lavoisier's early combustion and fermentation experiments, which showed a new, if naïve, attitude toward handling experimental data. Dalton's atomic theory was consistent with the empirical laws of definite, equivalent, and multiple proportions. The basis of our current notation and of precis...more
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This lecture covers Purgatory V, VI, IX and X. The purgatorial theme of freedom introduced in the previous lecture is revisited in the context of Canto V, where Buonconte da Montefeltro's appearance among the last minute penitents is read as a critique of the genealogical bonds of natural necessity. The poet passes from natural to civic ancestry in Purgatory VI, where the mutual affection of Virgil and Sordello, a former citizen of the cla...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 multibillion-d...more
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JetBlue's secrets for success: Hire and train great people, develop purpose, vision and values. Establish organizational culture, listen to customers and employees. Cultivate leadership. Provide incentives to employees.
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Analyzing unemployment data to show that "real" unemployment is worse than the headline numbers show.
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