Onderstepoort today, yesterday and tomorrow. Commemorative lecture.

Virulence of Helicobacter Pylori: Yesterday, Today and Tomorrow

Abstract Undoubtedly, H. pylori is the major human gastric pathogen, which infects the mucosal epithelium in 50% of world population. However, H. pylori infection is relatively prevalent globally the majority of infected individuals are asymptomatic. The recent epidemiological studies show that the various gastro intestinal complications can be the result of genetic variation in H. pylori stra...

Alzheimer's Disease: Yesterday, Today, Tomorrow

Alzheimer's disease is the most common and well - known cause of dementia, as a progressive, irreversible brain disorder that affects cognitive function, personality, thought, perception and behaviour. Alzheimer's disease is the fourth leading cause of death in western countries. Interesting to know that this disease was unknown in medical community till 100 years ago and had no name. Dr. Alois...

Let us get on with it.

It was important to have a New Year’s sermon—something about resolutions, I thought, and to my chagrin, I discovered that the words resolution and resolve do not appear in the Bible, neither in the Old nor New Testament. Why is that? Aren’t resolutions like the New Year’s ones good? Isn’t it good to have goals? Yesterday, today and tomorrow There are two days in every week we should not worry a...

Indexical Hybrid Tense Logic

In this paper we explore the logic of now, yesterday, today and tomorrow by combining the semantic approach to indexicality pioneered by Hans Kamp [9] and refined by David Kaplan [10] with hybrid tense logic. We first introduce a special now nominal (our @now corresponds to Kamp’s original now operator N) and prove completeness results for both logical and contextual validity. We then add propo...

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