design in the time domain
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Review of the Dining Philosopher Problem, Modeling Each Philosopher as a Thread, How Deadlock Can Result, How Deadlock Can be Eliminated By Limiting the Number of Philosophers That Can Eat at Once Using a Semaphore, Using a Global Variable and a Binary Lock to Track a Resource Vs. Using a Semaphore, Another Threading Example Involving FTP Downloads of Multiple Files at Once, Where Each File Is Assigned to a Thread and the Total Number of B...more
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Transitioning from Sequential Programming to Concurrent Programming in the Ticket Sale Example
Stanford / Computer Science
Transitioning from Sequential Programming to Concurrent Programming in the Ticket Sale Example, Problems with the Sequential Model, Threading Interface, Rewriting the Ticket Example to Use It, Adding a Randomized Threadsleep Call to the Threads to Make the Time Slices Used by the Different Threads Less Uniform, Sample Output of Our Ticket Threads, How a Thread Can be Interrupted in the Middle of a Nonatomic Operation, How Multithreading Ca...more
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Professor Mazzotta lectures on the final cantos of Paradise (XXX-XXXIII). The pilgrim's journey through the physical world comes to an end with his ascent into the Empyrean, a heaven of pure light beyond time and space. Beatrice welcomes Dante into the Heavenly Jerusalem, where the elect are assembled in a celestial rose. By describing the Empyrean as both a garden and a city, Dante recalls the poles of his own pilgrimage while dissolving ...more
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In this lecture, Professor Kagan describes the aftermath of the Thirty Years Peace. He argues that the Peace had the potential to keep peace between Athens and Sparta due to the arbitration clause. In addition, he argues that during this time, Athens sends various diplomatic messages to the wider Greek world stating their intentions for peace, such as the Panhellenic venture to establish Thurii. However, this peace is seriously challenged ...more
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This lecture focuses on Paradise XXVII-XXIX. St. Peter's invective against the papacy from the Heaven of the Fixed Stars is juxtaposed with Dante's portrayal of its contemporary incumbent, Boniface VIII, in the corresponding canto of Inferno. Recalls of infernal characters proliferate as the pilgrim ascends with Beatrice into the primum mobile. Bid to look back on the world below, Dante perceives the mad track of his uneasy archetype, Ulys...more
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Dell explains the culture and dynamics of Dell, Inc. during its early years. The company was run by hardworking, versatile people who were action-orientated and willing to listen. Many of those early employees went on to fill important positions at the company later on. Some employees, however, had a hard time as the company grew, even though they had performed well when the company was smaller. At a fast-growing company, Dell notes, the j...more
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Neeleman points out that JetBlue pays employees more than standard wages at United Airlines. They use technology to be more efficient, to spend less money in other areas. Much of the pay that employees receive is incentives. For example, pilots and flight attendants who fly over 70 hours each month receive time and 1/2. About 20% of compensation last year was based on the success of the company. In the 2nd full year of operation, over $17 ...more
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In this lecture, Professor Kagan describes the growth of a new power: Thebes. Under the leadership of Epaminondas and Pelopidas, Thebes grows into a major power among the Greek cities. In fact, the Thebans even rout the Spartans in a standard hoplite battle in the battle of Leuctra. Finally, Professor Kagan points out that by the time of Theban hegemony, the Greek world had experienced so many wars and conflicts that it opened the door to ...more
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The numbers are stacked against the inspired business owner-to-be. Seasoned angel investors Ron Conway and Mike Maples talk about how many ideas they receive, how many executive summaries they peruse, how many meetings they call, and the shockingly few ventures - roughly one out of 150 - that end up receiving their investment of time and money. Also, Conway points out that investing is a risky business, with an even split between those t...more
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Neeleman talks about how he tells his employees a simple formula for success: Show up to work, on time, with a good attitude. Take care of your fellow workers. If you set that expectation level, and are consistent, and model the behavior you expect, the employees then model it for each other, he adds. Neeleman also tells the story of the Southwest pilots who were fired for flying naked in the cockpit.
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For a venture capital firm, the time they choose to invest in a company is important. At Mayfield Fund, Roberts explains, they either like to come in early and get a reasonable ownership of the company or take the less risky path of entering at a later stage. However, it is hard to invest in a middle stage deal where money requirements are higher and the concept has not yet been proven.
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Evolution plays an important though underutilized role in medicine. Evolution guides how our bodies respond to various treatments, how pathogens will respond to treatments, and how pathogens' responses will change over time. Pathogens oftentimes will evolve to an intermediate level of virulence where they become strong enough to infect a host and reproduce, but not so strong as to kill the host before it can spread the pathogen.
