1954; Donham, 1949). Since that time, it has become a very popular vehicle in im-parting knowledge in business schools across the country. With particular ref-erence to courses in operations manage-ment, Bandyopadhyay (1994) made a strong recommendation for a greater emphasis on using the case approach as opposed to the conventional lecture method. Osigweh (1989) has enumer-ated many major sets of appeals for the case approach over the conventional methods of teaching. The case method-ology focuses on “doing ” in a class-

been aware for some time of many func-tiunal effects of early visual deprivation at the single-neuron level. Their results from normal, monocularly deprived (MD), and binocularly deprived (BD) cats have dem-onstrated that cells of the striate cortex de-veloped permanently abnormal receptive-field properties in the deprived cats. For instance, they reported that most cells in the normal cat’s striate cortex had recep-tive fields which could be activated by ap-propriate visual stimuli applied to either eye, and that these fields generally had orientation and/or direction selectivity (10). In the MD cat, the striate neurons’

Long a matter of folklore, the “small-world phenomenon ” — the principle that we are all linked by short chains of acquaintances — was inaugurated as an area of experimental study in the social sciences through the pioneering work of Stanley Milgram in the 1960’s. This work was among the first

Dedicated to one of the pioneers of modern albuminuria research in diabetes, a close friend and teacher,

Abstract Often, there are two streams in statistical research -one developed by practitioners and other by main stream statisticians. Development of geostatistics is a very good example where pioneering work under realistic assumptions came from mining engineers whereas it is only now

workers prefer working in urban areas. In response, a community outreach program has been developed in rural, southwestern Uganda to deliver e¡ective mental health care. The programme was aimed at improving access to psychiatric care by taking services to communities where the majority of the rural

of Dr. Klenner’s twenty-eight (through 1974) scientific publications.” “When I first came across Klenner’s work on polio patients, ” writes Thomas Levy, “I was absolutely amazed and even a bit overwhelmed at what I read... To know that polio had been easily cured and so many babies, children, and some

Abstract. The genesis of this paper is the construction of a new operator that, when combined with a theorem of Herrero, settles a question of Herrero. Herrero proved that a strictly cyclic operator on an infinite dimensional Hilbert space is never triangular. He later asks whether the adjoint of a strictly cyclic operator is necessarily triangular. We settle the question by constructing an operator T for which both T and T ∗ are strictly cyclic. We make a detailed study of this bi-strictly cyclic operator which leads to theorems about general bi-strictly cyclic operators. We conclude the paper with a comparison of the operator space structures of the singly generated algebras A(S) and A(T), when S is strictly cyclic and T is bi-strictly cyclic.

Important elements for the history of the Kohlrausch (or stretched exponential) relaxation function were recently presented by Cardona, Chamberlin, and Marx [1]. The Kohlrausch function is given by P (t) = exp −(t/τ0)β

Astronomy and navigation depend to a large extent on the ability to measure angular displacements with a high degree of accuracy, and since early times instrument makers have sought to improve the usefulness of their products by innovation. Shortly after ingots of malleable platinum and palladium became available commercially in England it was realised that these new metals had properties which were superior to those of silver, upon which the scales used for measuring angles were then engraved. The use made of platinum and palladium by one Londonfirm of instrument makers in thefirst half of the nineteenth century is considered here. The platinum that came to be used by makers of scientific instruments early in the 19th cen-tury had its origin in one of the Spanish col-onies in South America, the Viceroyalty of New Granada. It occurred there as white metallic grains mixed with black magnetic sand and grains of gold, in alluvial deposits in the Chocd district of what is now the Republic of Colom-bia. The grains of both metals were rounded and of approximately the same size, the propor-tion of platinum present varying in different localities from one to four or even more ounces per pound of gold. Grains of gold and those containing platinum were recovered together from alluvial deposits by washing, and the two kinds were then separated from each other by hand sorting, grain by grain. Any gold which still remained associated with platinum was then removed by amalgamation with mercury. No practical use was found during the greater part of the 18th century for these white metallic grains which, on the orders of the Spanish Government, were thrown into the Bogota river, that method of disposal being intended to prevent fraud which might otherwise occur by melting platinum-containing grains with gold (I). One of the names applied in the gold mines of the Spanish West Indies to these white