Gault and Lower Greensand near Leighton Buzzard

The anisotropy of Leighton Buzzard sand under general stress conditions

A hollow cylinder apparatus was used to investigate the inherent anisotropy and membrane penetration of Leighton Buzzard sand test-specimens. The degree of inherent anisotropy was found to be independent of the mean effective stress but dependent on the initial relative density of the test-specimen. In the vertical-tohorizontal directions, the degree of inherent anisotropy decreases with increa...

Chris Leighton

Electronic and magnetic materials are the central focus of our group's research. We study a wide variety of types of materials such as nanostructures, thin films, multilayered heterostructures, and bulk polycrystals and single crystals. We have interests in several areas including the interplay between electronic transport and magnetism in novel materials, and the study of interfaces between di...

Amending Leighton and Micali's Key Distribution Protocol

A key distribution protocol is a set of rules by which two users can establish a shared common key between them and then use the key in future secure communications. We analyze a key distribution protocol presented by Leighton and Micali at the CRYPTO'93 conference, which is based on tamper-proof hardware, and show that the protocol fails in that a common key shared between two users can always...

Tom Leighton and Eric Lehman Problem Set 3 Solutions

Tom Leighton and Eric Lehman Problem Set 5 Solutions

(a) Find a closed-form expression for the diameter of the ternary tree. Solution. The diameter is 2 log3 N + 1. (b) Prove that your expression is correct using induction. Hint: Your induction hypothesis should prove an expression for the length of a path from an input to the root node. Solution. We proceed by induction on n. Let P (n) be the proposition that, in a complete tenary tree with N = ...