electronic structure
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Although molecular mechanics is imperfect, it is useful for discussing molecular structure and energy in terms of standard covalent bonds. Analysis of the Cambridge Structural Database shows that predicting bond distances to within 1% required detailed categorization of bond types. Early attempts to predict heats of combustion in terms of composition proved adequate for physiology, but not for chemistry. Group- or bond-additivity schemes a...more
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Futures markets were started in Osaka, Japan in the 1600s to create an authoritative and meaningful market price for agricultural products, using standardized contracts. Since then, futures markets have been copied around the world to allow the hedging various future risks, financial and other. In the United States, the Chicago Mercantile Exchange and the Chicago Board of Trade have been the most popular futures trading markets. Although f...more
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Erin Turner, a producer at Electronic Arts specializing in action-hero titles, explains that the GameBoy has a pretty substantial market with 40 million sold worldwide. The mission with the GameBoy is to create some unique draw or additional fun factor, since it does not have nearly the graphical capabilities as a console, she says. The team's challenge is to provide the optimal gaming experience, while working within the constraints of ...more
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Knowledge of historical context is crucial to understanding the New Testament. Alexander the Great, in his conquests, spread Greek culture throughout the Mediterranean world. This would shape the structure of city-states, which would share characteristically Greek institutions, such as the gymnasium and the boule. This would also give rise to religious syncretism, that is, the mixing of different religions. The rise of the Romans would con...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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According to Arcadia Kim, Chief Operating Officer for Electronic Arts Los Angeles, an entrepreneur is someone who sees an opportunity that other people cannot see, tries to understand the competitive landscape around this opportunity, assumes the inherent risk, and relentlessly and persistently pursues success. Specifically in the game industry, however, the objective for the entrepreneur is to deliver fun, she adds.
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Half a century before direct experimental observation became possible, most structures of organic molecules were assigned by inspired guessing based on plausibility. But Wilhelm Körner developed a strictly logical system for proving the structure of benzene and its derivatives based on isomer counting and chemical transformation. His proof that the six hydrogen positions in benzene are equivalent is the outstanding example of this chemical...more
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Elon Musk, co-founder, CEO, and chairman of PayPal, shares his background: He was accepted into Stanford but deferred his admission to start an internet company in 1995. His company was zip2 which helped the media industry convert their content to electronic medium. Then, he sold the company for over $300 million and never came back to Stanford.
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Nick Earl, General Manager of Electronic Arts Redwood Shores Studio, shares his insights about moving into the mobile gaming market. He explains that the high price of building graphical games is prohibitive in an environment where there is no hardware standardization.
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What does JetBlue think about organizational structure? We thought about how we would hire, train, set expectations and monitor to make sure this was actually happening, says Neeleman. We train employees well, and empower them and compensate them well, he adds.
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Youthful chemists Couper and Kekulé replaced radical and type theories with a new approach involving atomic valence and molecular structure, and based on the tetravalence and self-linking of carbon. Valence structures offered the first explanation for isomerism, and led to the invention of nomenclature, notation, and molecular models closely related to those in use today.
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In this lecture, Professor Diamond begins an in depth discussion of the cardiac system. She notes how the unique structure of cardiac muscle as intercalated disks enables the transfer of electrical impulses through the cardiac muscle. Professor Diamond describes the differences between systemic and pulmonary circulation. She introduces the components of the heart, discussing the right and left atrium and right and left ventricle, and de...more
