Waters’ variant of the Boneh-Boyen IBE scheme is attractive because of its efficency, applications, and security attributes, but suffers from a relatively complex proof with poor concrete security. This is due in part to the proof’s “artificial abort” step, which has then been inherited by numerous derivative works. It has often been asked whether this step is necessary. We show that it is not,...

Minimally invasive dentistry is not a very new concept but still many dental practitioners do not know its importance. Many novel dental materials and techniques now work on the principle of minimal invasion. One such technique is air abrasion. Air abrasion was first described by Black (1945).1 His aim was to develop a technique that is effective, works on the principles of minimal invasion and...

Grain size distributions in eolian settings are the result of both sorting and abrasion of grains by saltation. The two are tightly coupled because mobility of particles determines abrasion rate, while abrasion affects the mobility of particles by changing their mass and shape; few field studies have examined this quantitatively. We measured grain size and shape over a 9 km transect downwind of...

UNLABELLED BACKGROUND Excessive shoe heel abrasion is of concern to patients, parents and shoe manufacturers, but little scientific information is available. The purpose of this study was to describe the phenomenon in a group of infantry recruits performing similar physical activity, and search for biomechanical factors that might be related. METHODS Seventy-six subjects (median age 19) en...

This paper focuses on effect of abrasion process on color and reflectance factor changes of dyed woven fabrics containing 100% acrylic chenille yarns in weft and cotton warp yarns. Three fabrics having 12, 14 and 16 weft per centimeter were dyed with three basic dyes in different hues. Four different abrasion levels, i.e. 50,200,400 and 650 were selected to abrade samples. The obtained results ...

In this note, we describe an error in the proof for CLRW2 given by Landecker et al. in their paper at CRYPTO 2012 on the beyond-birthday-bound security for tweakable block ciphers. We are able to resolve the issue, give a new bound for the security of CLRW2, and identify a potential limitation of this proof technique when looking to extend the scheme to provide asymptotic security.

The collision and friction between the coarse solid particle concrete surface are main reason for abrasion damage of structures caused by debris flow. Fibre reinforcement can improve shear resistance toughness concrete, however, their effects on flow mechanism yet not well understood. In this study, influences type dosage steel fibre, slurry concentration gravel content fibre-reinforced investi...

M. Naor (Ed.): TCC 2004, LCNS 2951, pages 336 352, February 2004. c © Springer-Verlag Berlin Heidelberg 2004. Abstract. We consider compositional properties of reactive systems that are secure in a cryptographic sense. We follow the well-known simulatability approach of modern cryptography, i.e., the specification is an ideal system and a real system should in some sense simulate this ideal one...

The objective of this experimental investigation is to use the ASTM C1138 (underwater) test method investigate influence quantity and type coarse aggregates on hydrodynamic abrasion resistance concrete. Thereafter, relationships between concrete with its principal mechanical properties are comparatively examined. It found that natural replace fine by up 25% does not significantly affect perform...