A vision for a Reformed Christian college for South Africa
A yawning gap has existed in the South African educational landscape since the effective termination of the Potchefstroom University (PU) for Christian Higher Education (CHE) by the government in 2004. The North-West University, which was formed through the merger of the PU for CHE and the University of North West, has been positioned as a value-driven university, but for all its good intentions and successes, it cannot (and never was intended to) continue the PU for CHE’s tradition of Christian higher education. Given the growth of Christian schools in South Africa after 1994, it is clear that pupils from these and other schools have no Reformed option when they choose an institution of higher education. It is therefore suggested in this article that the concept of a new Christian college should find favour amongst Reformed Christians from all denominations, races, ethnic groups and languages in South Africa. The author argues that obstacles simply have to be overcome. A balanced Reformed approach which eschews extreme fundamentalism as well as attempts at undermining the fundamentals of the Christian faith is needed. Therefore, the formation of an inclusive pilot committee to investigate the idea is proposed.
Teaching journalism prior to and after the demise of Christian higher education at Potchefstroom
This article explores how the step-by-step changes to the Potchefstroom University for Christian Higher Education (resulting in the merger with the University of the North-West to form the North-West University [NWU]) impacted on the teaching of journalism at the Potchefstroom Campus. It was particularly relevant in 2009, as 50 years of teaching journalism and other communication subjects were celebrated by the School of Communication Studies on the Potchefstroom Cam-pus of the NWU. The article thus also has a definite historio-graphical intention – more specifically as an attempt at writing micro-historiography. It aims to illustrate how a definite Christian perspective on journalism was substituted for a slimmer “value-driven” approach sans an explisit religious dimension. Although it has been suggested by the vice-chancellor that lecturers had the right to express their views in class (including views based on Christian principles), it is argued here that the termination of the formal Christian approach made it very difficult, if not impossible, for lecturers to continue as in the past. As a result of the value-driven approach professional and institutional ethical codes are now used as a basic point of departure. This, however, does not satisfy those who prefer a more fundamental Christian approach to journalism. It is suggested that if this reading of the situation was erroneous, perhaps those Christians with a more positive view of the “name change” could give clearer leadership on how Christian perspectives on science (and journalism) can realistically be accommodated in the curriculum.
Rubik's for cryptographers
Hard mathematical problems are at the core of security arguments in cryptography. In this paper, we study mathematical generalizations of the famous Rubik’s cube puzzle, namely the factorization, representation and balance problems in non-Abelian groups. These problems arise naturally when describing the security of Cayley hash functions, a class of cryptographic hash functions with very interesting properties. The factorization problem is also strongly related to a famous long-standing conjecture of Babai, at the intersection of group theory and graph theory. A constructive proof of Babai’s conjecture would make all Cayley hash functions insecure, but on the other hand it would have many positive applications in graph theory and computer science. In this paper, we classify existing attacks against Cayley hash functions and we review known results on Babai’s conjecture. Despite recent cryptanalytic progress on particular instances, we show that the factorization, representation and balance problems presumably remain good sources of cryptographic hard problems. Our study demonstrates that Cayley hash functions deserve further interest by the cryptography community.