Recent advances in the modelling of renal function

Differential equation models have become an indispensable tool in the effort towards a complete understanding of hypertonic urine formation. Recent advances in this field include the treatment of a kidney model as an inverse prob lern, the modelling of the three-dimensional Organization of the renal medulla, and dynamic models for the tubuloglomerular feedback mechanism. The latter make use of techniques from bifurcation and chaos theory

Compensation of pulse-rebalanced inertial instruments

Study explains the basic concept of pulse-rebalanced inertial instruments in terms of an idealized model which performs the processes of integration, prediction and quantization. An analytical model of an actual pulse-rebalanced instrument was derived in a form comparable to the idealized system

Gathering in the Orphans: Essay Films and Archives in the Information Age

This research proposes that the essay film, through its reflective and fragmentary approach to structuring text, moving image and sound, and its mediation between filmmaker and audience as a part of the way it ‘thinks through’ its material, presents both a distinct method, as well as a unique history, from which to contextualise the changes the information age brings to cinema. Essay films, archives and the information age seems on first glance an odd assemblage of terms to bring together. Essay films usually are fixed with adjectives such as difficult, peripheral, intellectual and personal; archives are about the past and connote all manner of things analogue (even if the interface to them is digital); the archive is filled with reels, tapes, files and papers and brings to mind a physical space – a vault, a brick and stone building, a municipal library or a state museum. Unlike essay films they are public repositories, associated with adjectives such as immovable, backward looking, inflexible, inaccessible. The information age, in contrast is digital, paperless, remote, virtual, future-orientated, progressive and contains within it notions of both personal and public space. What might these three things – essay films, archives and the information age have to do with one another? The goals of the research are to expand the body of work claiming the essay film as a distinct genre and to further explore the technological and narrative aspects of this mode of filmmaking. The research anticipates how this knowledge might be useful in thinking through cinema’s future forms and how examples of contemporary practice demonstrate this. This analysis is supplemented by knowledge gleaned from interviews with three filmmakers whose work can in some way be categorised as essayistic - Joram ten Brink, Patrick Keiller and Chris Petit. The written work is complimented by my practical research – the development of a 20minute film essay ‘The Blue Wall’, which takes two dates - London winning the 2012 Olympic games on July 6th and the terror attacks of July 7th as a catalyst to explore themes such as the interrelationship between violence and nationalism, regeneration, sport and development legacies, globalisation and national branding and the role of images in each. Through the project work I have explored the impact of several new production and postproduction technologies and the ways in which they support processes and techniques long used by film essayists to interrogate the image world

Evaluation of selected strapdown inertial instruments and pulse torque loops, volume 1

Design, operational and performance variations between ternary, binary and forced-binary pulse torque loops are presented. A fill-in binary loop which combines the constant power advantage of binary with the low sampling error of ternary is also discussed. The effects of different output-axis supports on the performance of a single-degree-of-freedom, floated gyroscope under a strapdown environment are illustrated. Three types of output-axis supports are discussed: pivot-dithered jewel, ball bearing and electromagnetic. A test evaluation on a Kearfott 2544 single-degree-of-freedom, strapdown gyroscope operating with a pulse torque loop, under constant rates and angular oscillatory inputs is described and the results presented. Contributions of the gyroscope's torque generator and the torque-to-balance electronics on scale factor variation with rate are illustrated for a SDF 18 IRIG Mod-B strapdown gyroscope operating with various pulse rebalance loops. Also discussed are methods of reducing this scale factor variation with rate by adjusting the tuning network which shunts the torque coil. A simplified analysis illustrating the principles of operation of the Teledyne two-degree-of-freedom, elastically-supported, tuned gyroscope and the results of a static and constant rate test evaluation of that instrument are presented

Agricultural phosphorus and water quality (1999)

Does phosphorus reduce water quality? Is the problem nitrogen or phosphorus? What fields and practices cause high phosphorus in agricultural runoff? How can farmers protect our water quality from excess phosphorus? This guide demonstrates the complexities of reducing losses of phosphorus from agricultural land and the range of options available to help reach water quality goals.New 3/99/5M

Managing manure phosphorus to protect water quality (1999)

This guide defines the unique aspects of managing manure as a phosphorus fertilizer source and provides practical information about management strategies to reduce phosphorus losses from your farm.New 3/99/5M

Managing nitrogen to protect water quality (2006)

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Setback distances for land application of manure (2006)

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Soil sampling pastures (2005)

Collecting a representative soil sample is an important step in developing a nutrient plan for your farm. The goals of your soil sampling plan should be to Identify manageable sized fields with similar characteristics. Accurately and cost-effectively determine the nutrient status of those fields.New 2/05/3M