self-desiccation is the major source of autogenous shrinkage and crack formation in low water-binder ratio (w/b) concretes which can be reduced by internal curing. in this paper performance of high strength self consolidating concrete (hs-scc) with w/b of 0.28 and 0.33 including autogenous shrinkage, drying shrinkage, compressive strength, and resistance to freezing-thawing was investigated. th...

The nature of constrained resources of sensor nodes, beside of the inherent vulnerability, led to proposing many lightweight cryptosystems in Wireless Sensor Networks. In this paper, we have traced the use of appropriate cryptosystems for wireless networks and covered different cryptographic protocols of main primitives, which are Encryption, Digital Signature and Key Agreement. Our unique inte...

We present Lightweight Email Signatures (LES), a simple cryptographic architecture for authenticating email. LES is an extension of DKIM, the recent IETF effort to standardize domain-based email signatures. LES shares DKIM’s ease of deployment: they both use the DNS to distribute a single public key for each domain. Importantly, LES supports common uses of email that DKIM jeopardizes: multiple ...

Current World Wide Web technologies concentrate on presenting documents to human readers. Although HTML identifies structures within a document, it does not allow the semantic content of document sections to be specified explicitly. We investigate a small extension to HTML which allows parts of a document to be mapped onto an underlying database schema. This allows automatic identification and ...