A small change to TCP to reduce its reliance on the retransmission timer:
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Allman et al (2002) Increasing TCP's Initial Window (RFC3390)
Instead of what RFC2581 describes, the initial congestion window is increased to 2-4 MSS:
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Nerd Clock
A picture of nerd clock if you search on Google:
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Crisan et al (2011) Short and Fat: TCP Performance in CEE Datacenter Networks (HotI)
Properties of datacenter networks
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Öhring et al (1995) On Generalized Fat Trees (IPPS)
This paper gives a generalized description of fat tree topology, and invented the notation:
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