We developed a new semi-supervised EM-like algorithm that is given the set of objects present in eachtraining image, but does not know which regions correspond to which objects. We have tested thealgorithm on a dataset of 860 hand-labeled color images using only color and texture features, and theresults show that our EM variant is able to break the symmetry in the initial solution. We compared...

1. A family is reported with an unusual type of cystinuria. 2. The propositus presented with a cystine renal stone; the renal tubular reabsorption of cystine was grossly abnormal but the tubular reabsorption of ornithine, lysine and arginine was only slightly less than normal. 3. One of the children of the propositus escreted cystine and lysine in increased amounts typical of type II heterozygo...

The USA and South Africa are among the world’s leading biological weed control countries. By 1998, seventy-three biocontrol agents had been released on thirty-six weeds in USA mainland and by 1999, eighty-two agents on forty-seven weeds in South Africa. The early Hawaiian projects served as a training school and source of tested biocontrol agents for other countries. In South Africa, nineteen o...

New variant Creutzfeldt-Jakob disease is a novel human prion disorder with characteristic clinical and neuropathological features, which results from exposure to the bovine spongiform encephalopathy agent. The probably lengthy incubation period makes it difficult to predict future new variant Creutzfeldt-Jakob disease case numbers; further studies are required to clarify risk factors and the po...

Rollout of the Oxford-AstraZeneca covid-19 vaccine in South Africa has been paused after a study 2000 healthy and young volunteers reported that it did not protect against mild moderate disease caused by new variant (501Y.V2) emerged there. The study, which published was seen Financial Times ,1 looked at efficacy 501Y.V2 variant—which accounts for around 90% cases Africa—in HIV negative people...

Ten patients who were unable to initiate or sustain eye opening in the absence of overt spasm of the orbicularis oculi, were investigated. In five, the problem was isolated. Three had Parkinson's disease and two progressive supra-nuclear palsy for between one to six years before the eye opening difficulty developed. The clinical features and electrophysiological investigation suggested that the...