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The Great Mental Models, Volume 1
Discover the essential thinking tools you’ve been missing with The Great Mental Models series by Shane Parrish, New York Times bestselling author and the mind behind the acclaimed Farnam Street blog and “The Knowledge Project” podcast. This first book in the series is your guide to learning the crucial thinking tools nobody ever taught you. Time and time again, great thinkers such as Charlie Munger and Warren Buffett have credited their success to mental models–representations of how something works that can scale onto other fields. Mastering a small number of mental models enables you to rapidly grasp new information, identify patterns others miss, and avoid the common mistakes that...
Box of Butterflies
Roma Downey--best known as the beloved angel on the TV show Touched by an Angel--has created a beautiful book filled with encouragement and hope, assuring us of God's comforting presence in our lives. Ever since she was a little girl, Roma has seen butterflies as a reminder of God's presence. They have appeared to her in moments when she needed encouragement and reminded her she is not alone. In this deeply personal book, Roma shares stories from her life, alongside quotes, poems, scripture, and artwork that she prays will uplift you as they have her. Each grace-filled chapter of this beautiful full-color book covers topics such as courage, strength, gratitude, love, and kindness. Reminiscen...
Bettie Page: Unbound #4
Bettie’s next stop on her dimension-hopping quest finds her six inches tall…with gossamer wings. Can one tiny adorable sprite stop the most powerful creatures in the multiverse from throwing it all into chaos and destruction?
Federal Register
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The Genesis of Feynman Diagrams
In a detailed reconstruction of the genesis of Feynman diagrams the author reveals that their development was constantly driven by the attempt to resolve fundamental problems concerning the uninterpretable infinities that arose in quantum as well as classical theories of electrodynamic phenomena. Accordingly, as a comparison with the graphical representations that were in use before Feynman diagrams shows, the resulting theory of quantum electrodynamics, featuring Feynman diagrams, differed significantly from earlier versions of the theory in the way in which the relevant phenomena were conceptualized and modelled. The author traces the development of Feynman diagrams from Feynman's "struggle with the Dirac equation" in unpublished manuscripts to the two of Freeman Dyson's publications which put Feynman diagrams into a field theoretic context. The author brings to the fore that Feynman and Dyson not only created a powerful computational device but, above all, a new conceptual framework in which the uninterpretable infinities that had arisen in the old form of the theory could be precisely identified and subsequently removed in a justifiable manner.
