P.726, lines 3–4. Replace “However, none of these authors gave formal definitions of substitution and conversion, which are characteristic of CL and λ proper. These did not appear ...” by “However, none of these authors showed the interplay between reduction, substitution and conversion explicitly by means of a formal theory, as is done in CL and λ. The latter theories did not appear ...”. P.72...

[1] Human activities have increased tropospheric ozone, contributing to 20th-century warming. Using the spatial and temporal distribution of precursor emissions, we simulated tropospheric ozone from 1890 to 1990 using the NASA Goddard Institute for Space Studies (GISS) chemistry model. Archived three-dimensional ozone fields were then used in transient GISS climate model simulations. This enabl...

We analyze the evolution of cumulative national shares of Nobel Prizes since 1901, properly taking into account that most prizes were divided among several laureates. We rank by citizenship at the moment of the award, and by country of birth. Surprisingly, graphs of this type have not been published before, even though they powerfully illustrate the century’s migration patterns (brain drains an...

Spacewatch has carried out a full-time digital survey of the opposition region since September 1990. 129 Near-Earth asteroids have been discovered through the April 1996 observing run. Other discoveries include an average of about 2000 main-belt asteroids each lunation, 3 new Cenataur asteroids, and 5 comets (including a re-discovery of a long-lost comet). The present reduction methods and capa...

By “number theory” I mean algebraic number theory, and by Part 1, roughly the years 1900–1940. The treatment is very sketchy; I hope at some later date to cover the rest of the century and to fill in some of the gaps and correct any errors in this hasty account. At the end of the 19th century, Kurt Hensel introduced the idea of the completion kv of a field k with respect to a discrete valuation...

[1] We employ a coupled atmosphere-ocean climate model to investigate the evolution of stratospheric temperatures over the twentieth century, forced by the known anthropogenic and natural forcing agents. In the global, annual-mean lower-to-middle stratosphere ( 20–30 km.), simulations produce a sustained, significant cooling by 1920, earlier than in any lower atmospheric region, largely resulti...

Using daily minimum air-temperature (Tmin) data from the state of Illinois, the dates of spring and fall freezes – and the resulting growing-season length – are examined for trends during the period 1906–1997. Of the stations in the Daily Historical Climate Network, most show trends toward earlier spring freezes; however, trends in fall freezes are not consistent over the station network. Altho...

A great deal of research on farm and food policy and consumer choice focuses on the link between food consumption and nutrition. This paper presents and applies a new method to analyze the demand for food and nutrients, and consumer welfare. The foundation for this method is the recent extension of the Gorman class of exactly aggregable demand models to incomplete demand systems. The purposes o...