We show by a combination of theoretical argument and computer search that if a projective (75, 4, 12, 5) set in PG(3, 7) exists then its automorphism group must be trivial. This corresponds to the smallest open case of a coding problem posed by H. Ward in 1998, concerning the possible existence of an infinite family of projective two-weight codes meeting the Griesmer bound.

The minimal lethal dose of methanol in humans has not been determined. It has been suggested that about I g kg can cause death if the patient is untreated and has not consumed ethanol.43 In some clinical cases, the blood methanol content is low in the last phase of the poisoning. In three such cases blood methanol concentration was 0.275,_0.277. and 0.194 gi , respectively. On the assumption th...

Large areas of cultivated land in China, Japan and Thailand have been contaminated with lead (Pb), zinc (Zn) and cadmium (Cd) to the extent that demonstrable effects on human health have been reported. The extent of contamination virtually prohibits either removal of soils or agricultural utilization. Phytoremediation, the use of plants to extract toxic metals from soils, is one of the only via...

ANYONE WHO HAS BEEN TO Prague in recent years will have enjoyed a vibrant restaurant industry. In addition to Czech restaurants whose sandwich boards beckon tourists with traditional Bohemian cuisine, one finds several exciting additions to the culinary scene: three Michelin-starred establishments, a multitude of international dining options, and a variety of choices for the vegetarians who, un...

The Hungarian psychiatrist Laszlo Meduna was the first who induced epileptic fits to influence the course of mental illness. The following account, based on a review of Meduna's recently unearthed files and his writings, traces the beginnings of convulsive therapy.