THE MIRROR SYSTEM HYPOTHESIS AND INVESTIGATIONS OF BIRDSONG ARE REVIEWED IN RELATION TO THE SIGNIFICANCE FOR THE DEVELOPMENT OF HUMAN SYMBOLIC AND LANGUAGE CAPACITY, IN TERMS OF THREE FUNDAMENTAL FORMS OF COGNITIVE REFERENCE: iconic, indexical, and symbolic. Mirror systems are initially iconic but can progress to indexical reference when produced without the need for concurrent stimuli. Develop...

In recent years the major developments in employee-benefit plans sponsored or underwritten by private organizations have been reported regularly in the Social Xecurity Bulletin. Thiis year the report is in two parts. Part I, which appeared in the April issue of the Bulletin, included 1959 data on coverage, contributions, and benefits under health, welfare, and retirement plans. In addition it d...

From time to time the Bulletin carries reports on operations in the five States that supplement the unemployment insurance benefit with a small allowance for dependents of beneficiaries . This article discusses sources from which data on the dependents of wage earners can be obtained and the use of such information in estimating the extent to which inclusion of dependents’ allowances aflects th...

The Islamic Revolution of Iran has included symbolic aspects. The fundamental question of the article is that, what are the symbolic aspects of the Islamic Revolution of Iran and why the Islamic Republic of Iran has used these features to influence Islamic countries? Since the bearers of the word and the symbolic goods have the most legitimacy in social and political fields, this revolution has...

In recent years, a new approach has been developed for verifying security protocols with the aim of combining the benefits of symbolic attackers and the benefits of unconditional soundness: the technique of the computationally complete symbolic attacker of Bana and Comon (BC) [6]. In this paper we argue that the real breakthrough of this technique is the recent introduction of its version for i...

Finite automata model a wide array of applications in software engineering, from regular expressions to specification languages. Finite transducers are an extension of finite automata to model functions on lists of elements, which in turn have uses in fields as diverse as computational linguistics and model-based testing. Symbolic finite transducers are a further generalization of finite transd...

An implementation of a component-free symbolic vector algebra in Aldor is presented. This package provides two powerful functions: simplification of vector expressions and the proof of vector identities. The implementation benefits greatly from Aldor’s strong typing, which allows several simplification problems that have defeated previous implementations to be solved.