The term “problem tree” refers to a conceptual model used as a diagnostic tool to analyse a sequence of events that leads to a problem (such as bush encroachment in rangelands). A problem tree is useful because the consequences of different interventions can be visualised and understood more easily in diagrammatic form, thereby guiding management decisions regarding the problem. A problem tree ...

In 1945 Vannevar Bush proposed a machine that acted as a “supplement” to memory and met the particular information needs of its user. Because this “memex” recorded “trails” of selected documents, it has been seen as a precursor to hypertext. However, this paper considers Bush in relation to earlier concerns about memory and information, via the ideas of Robert Hooke and John Locke. Whereas Bush...

BACKGROUND The Australian cushion bush (Leucophyta brownii) of the Compositae family of plants has become a popular pot and container plant. The plant produces the sesquiterpene lactone allergen calocephalin. OBJECTIVES To assess the sensitizing potential of sesquiterpene lactones from cushion bush. PATIENTS/MATERIALS/METHODS Eleven Compositae-sensitive patients were patch tested with seven...

The objective of the study was to determine seasonal variation in the concentration of tannins in wild bush tea (Athrixia phylicoides L.) leaves. The BuOH-HCl_Fe reagent was used to analyze condensed tannins, whereas hydrolysable tannin was analyzed using potassium iodate. The absorbance was measured using a spectrophotometer. Significant seasonal variations in both condensed and hydrolysable t...

* Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, Easter Bush Veterinary Centre, Easter Bush, Roslin, EH25 9RG, UK, † Massey University Veterinary Teaching Hospital, Tennent Drive, Massey University, Private Bag 11-222, North Palmerston, New Zealand, ‡ School of Veterinary Science, University of Liverpool, Leahurst, Neston, South Wirral CH64 7TE, UK, § T...

This paper describes a spatial systems architecture allowing clients to modify parameters and run their own bush re simulations via map data provided by a world wide web server. The simulations conform to the model of bush re behaviors as well as operational requirements. A wavelet model and re simulation over a distributed network are considered in this paper and we demonstrate how the archite...

A comparative assessment of 45 potato varieties, including 41 new varieties Russian selection, has been carried out. The purpose the research is a and selection best them according to set economically valuable traits (adaptability, productivity, quality indicators tubers other parameters) in specific soil climatic conditions. It was found that highest plant productivity experiment relatively fa...

looks set to come under increasing challenge this fall as a senior Republican, the Senate majority leader, Bill Frist, said this summer he would support legislation to remove some of the administration's limitations on such research. The move is likely to result in a showdown between the president and the Senate. Frist, a heart and lung transplant surgeon, and a close ally of the president, had...

INTRODUCTION Nurses have practiced in Bristol Bay, Alaska, since 1896. Practice opportunities are defined by institutional structures and systems; and the geography, climate, and history of remote South-west 'bush' Alaska. The Native Alaskan culture as experienced through nurses' practice, community relations, and in several cases, marriages, shapes their lives as well. The purposes of this qua...