Field experiments were conducted across the north-central United States to determine the benefits of various weed control strategies in corn. Weed control, corn yield, and economic return increased when a preemergence (PRE) broad-spectrum herbicide was followed by (fb) postemergence (POST) herbicides. Weed control decisions based on field scouting after a PRE broad-spectrum herbicide application increased weed control and economic return. Application of a PRE grass herbicide fb a POST herbicide based on field scouting resulted in less control of velvetleaf and morningglory species, corn yield, and economic return compared with a PRE broad-spectrum herbicide application fb scouting. Cultivation after a PRE broad-spectrum herbicide application increased weed control and corn yield compared with the herbicide applied alone, but economic return was not increased. An early-postemergence herbicide application fb cultivation resulted in the highest level of broadleaf weed control, the highest corn yield, and the greatest economic return compared with all other strategies. Weed control based on scouting proved to be useful in reducing the effect of weed escapes on corn yield and increased economic return compared with PRE herbicide application alone. However, economic return was not greater than the PRE fb planned POST or total POST strategies.

Digital signal processing is one of many valuable tools for suppressing unwanted signals or inter-ference. Building hardware processing engines seems to be the way to best implement some classes of interference suppression but is, unfortunately, expensive and time-consuming, especially if several miti-gation techniques need to be compared. Simulations can be useful, but are not a substitute for real data. CSIRO’s Australia Telescope National Facility has recently commenced a ‘software radio telescope’ project designed to fill the gap between dedicated hardware processors and pure simulation. In this approach, real telescope data are recorded coherently, then processed offline. This paper summarises the current contents of a freely available database of base band recorded data that can be used to experiment with signal processing solutions. It includes data from the following systems: single dish, multi-feed receiver; single dish with reference antenna; and an array of six 22 m antennas with and without a reference antenna. Astronomical sources such as OH masers, pulsars and continuum sources subject to interfering signals were recorded. The interfering signals include signals from the US Global Positioning System (GPS) and its Russian equivalent (GLONASS), television, microwave links, a low-Earth-orbit satellite, various other transmitters, and signals leaking from local telescope systems with fast clocks. The data are available on compact disk, allowing use in general purpose computers or as input to laboratory hardware prototypes.

Since 1947, the relationship between Indian society and the British empire has provided the most important frame of reference for scholars writing about the history of modern India. India is often treated merely as an exemplar of the colonial condition. As a result, scholars have failed properly to examine modern India's participation in global processes of historical change, and been reluctant adequately to ‘provincialize’ Europe. This review argues that historians need to move beyond this imperial frame of reference if they are to explain the transition to, or characteristics of, British rule in the subcontinent. Placing modern India in a broader comparative context allows one to see how the colonial subcontinent participated in an uneven but broadly comparative set of processes which occurred across Asia as well as Europe in the eighteenth and nineteenth centuries. There are, for example, important parallels between the process of active state-, economy-, and culture-formation occurring in France, Germany, and India in the nineteenth century, for example. This comparative approach would not denigrate the importance of ‘colonialism’ as an analytical category. It might, though, allow historians to produce a more satisfying interpretation of the difference between colonial and non-colonial states and societies.

Historians of political thought tend to emphasize the continuous flow and transmission of concepts from one generation to the next, and from one place to another. Historians of Indian ideas suggest that India was governed with concepts imported from Europe. This article argues instead that the sense of rupture that British officials experienced, from both the intellectual history of Britain and Indian society, played a significant role in forming colonial political culture. It examines the practice of “Hindu” property law in late eighteenth- and nineteenth-century Bengal. It suggests that the attempt to textualize and codify law in the 1810s and 1820s emerged from British doubts about their ability to construct viable forms of rule on the basis of existing intellectual and institutional traditions. The abstract and seemingly “utilitarian” tone of colonial political discourse was a practical response to British anxieties about their distance from Indian society. It was not a result of the “influence” of a particular school of British thinkers.