1. A function is arithmetic if it is defined on the positive integers. Those arithmetic functions which assume real values and satisfy f(ab)-f(a)+f(b) for mutually prime integers a, b are classically called additive. The following examples illustrate the interest of these functions, both for themselves and for their applications. An additive function is defined by its values on the prime powers...

Facing a second major event of computational linguistics in Prague in the history of Czech CL – the ACL Annual Meeting in June 2007 – we cannot leave the first such event – COLING 1982 – unmentioned. But alas – most unfortunately, we have to start with very sad news about the then President of the Congress, Professor Ján Horecký, who died on August 11th, 2006 in his hometown Stupava (near Brati...

A lot of decisions are made during boardroom meetings. After a discussion, the head of the board often asks for a quick poll. But what if you cannot join the meeting? So called boardroom voting schemes have been proposed to conduct the poll over the Internet and thereby enabling also those who are not present but available online to participant in the poll. But what if you are not available at ...

Assume that some businessmen wish to have a meeting. For this to occur, they usually have to meet somewhere. If they cannot meet physically, then they can take part in a video (or audio) conference to discuss whatever needs to be discussed. But what if their meeting is meant to be private? In this case they need a cryptographic protocol that allows them to exchange their ideas remotely, while k...

The present study examined the relationship between novice learners' counterfactual thinking (i.e. generating what if and if only thoughts) about their initial training experience with a computer application and subsequent improvement in task performance. The role of anticipated emotions towards goal attainment in task performance was also assessed. Undergraduate students (N = 42) with minimal ...

This study reports the different documentation that teachers encounter in four countries: England, Scotland, Northern Ireland and Wales. It considers the influence of this documentation on teachers’ implementations of ICT in early years practice. This influence is analysed in light of Seymour Papert’s ‘new forms of learning’ (1996). Early years’ teachers need to decide ‘how best’ computers can ...

Yet, behind the scenes, a very strong assumption—or belief— resides: that there is a fixed single population parameter. In this case, the mean value of weights for teenagers in the city is a single value. Therefore, without a serious flaw in the sampling process, the parameter is constant, though unknown, across all possible samples [2]. However, what if the parameter is not fixed but rather ha...

Let us assume that some businessmen wish to have a meeting. For this to happen, they usually have to meet somewhere. If they cannot meet physically, then they can take part in a video (or audio) conference to discuss whatever needs to be discussed. But what if their meeting is meant to be private? In this case they need a cryptographic protocol that allows them to exchange their ideas remotely,...