Electronic response systems known as “clickers” can enrich interactions in large audiences and have demonstrated educational benefits in well-resourced classrooms, but are cost-prohibitive in most environments. In an accompanying paper [1], we propose a new, low-cost technique that utilizes computer vision for real-time polling of large audiences. Our approach allows a presenter to ask a multip...

regarding the increasing demand for lightweight concrete especially lightweight structural concrete, and safety requirements underlined in 2800 iranian standard, research to achieve the optimized results in lightweight concrete production seems inevitable. since, one of the commonly used methods for producing the light eight concrete, utilizes the light weight aggregates with significant role i...

The Unified Modeling Language (UML) is used to describe a system that needed to interface with many external systems, at various levels of detail appropriate for a variety of user, developer, and tester audiences. Rational’s Rose CASE tool was used to produce a variety of UML-based products for these audiences.

background: biological shielding of nuclear reactors has always been a great concern and decreasing the complexity and expense of these installations is of great interest. in this study, we used datolite and galena (daga) minerals for production of a high performance heavy concrete. materials and methods: datolite and galena minerals which can be found in many parts of iran were used in the con...

We performed the musical work “Sense of Space” which uses the sound ID with high frequency sound DTMF. The IDs are embedded into the music, audiences' smartphones and tablets at the venue reacted to the IDs and then they play music pieces. We considered the possibility for novel music experiences brought about through the participation of audiences and spreading sound at the music venue.

this article is based on findings of research in the field of audiences of iranian modern and popular paintings which examines the problem of difference or indifference of the personal and social characteristics of iranian modern and popular paintings’ audiences and their artistic taste. moreover, factors effective on shaping these differences are examined. the general finding of the research s...

This Engineer Technical Letter (ETL) discusses the special problem areas and concerns related to RCC construction in order to assure that the concrete properties required are ultimately realized in the completed structure. A quality RCC product requires a coordinated effort between the structural designer, the materials engineer, the materials laboratory, and those responsible for field quality...

Signature schemes that are derived from three move identification schemes such as the Fiat-Shamir, Schnorr and modified ElGamal schemes are a typical class of the most practical signature schemes. The random oracle paradigm [1,2,12] is useful to prove the security of such a class of signature schemes [4,12]. This paper presents a new key technique, “ID reduction”, to show the concrete security ...

In recent work, Ishai, Prabhakaran and Sahai (CRYPTO 2008) presented a new compiler (hereafter the IPS compiler) for constructing protocols that are secure in the presence of malicious adversaries without an honest majority from protocols that are only secure in the presence of semi-honest adversaries. The IPS compiler has many important properties: it provides a radically different way of obta...

We present the results of an experiment examining the extent to which individuals will tolerate delays when told that such delays are for security purposes. In our experiment, we asked 800 Amazon Mechanical Turk users to count the total number of times a certain term was repeated in a multipage document. The task was designed to be conducive to cheating. We assigned subjects to eight between-su...