Political scientists studying institutional development face the challenge of accounting for both continuity and change over time. Models of path dependence based on increasing returns, inspired by the example of the QWERTY typewriter keyboard, have played an important role in the analysis of institutional continuity, but they have been criticized for their inability to accommodate change. In t...

First principles electronic structure calculations on a free CrSi12 cluster, a CrSi12 2 dimer, and CrSi12 clusters supported on Si 111 surfaces have been carried out within a gradient corrected density functional formalism using a supercell approach. The ground state of CrSi12 is a Cr centered hexagonal biprism of Si atoms in which the Cr spin moment is completely quenched. As two CrSi12 motifs...

This paper describes a method to duplicate the structural performance of a graphite-reinforced cementitious composite as the mix proportions and constituents of its cementitious matrix are varied. This is accomplished by placing a test specimen constructed using a modified mixture over a reinforcing scheme identical to that of a control standard and then matching the end deflection of these sam...

The language MIX consists of all strings over the three-letter alphabet {a, b, c} that contain an equal number of occurrences of each letter. We prove Joshi’s (1985) conjecture that MIX is not a tree-adjoining language.

In this paper we present eFarnel, a new electronic voting scheme based on the paper-based Farnel protocol. The new scheme corrects problems observed in previous proposes to simulate Farnel electronically. Moreover, we also define a new kind of mix net, called F-Mix-Net, which is required by our protocol.

A MIX net takes a list of ciphertexts (c1; ; cN) and outputs a permuted list of the plaintexts (m1; ; mN) without revealing the relationship between (c1; ; cN) and (m1; ; mN). This paper shows that the Jakobsson's ash MIX of PODC'99, which was believed to be the most eecient robust MIX net, is broken. The rst MIX server can prevent computing the correct output with probability 1 in our attack. ...

The aim of this study was to investigate the flexural behavior of engineered cementitious composites (ECCs) reinforced by cellulose pulp (CP) and cellulose microfibers (CMF). The reinforcements were obtained from chemical-mechanical treatments of Kraft paper and used in ECC mix design. Results showed that cement reinforced by CP exhibited a strain-hardening behavior in the three-point bending t...

The effect of individual and combined talc and glass fibers (GFs) on mechanical and thermal expansion performance of the filled high density polyethylene (HDPE) composites was studied. Several published models were adapted to fit the measured tensile modulus and strength of various composite systems. It was shown that the use of silane-modified GFs had a much larger effect in improving mechanic...