Chris Deuchar's Publications Page

Current update: Monday, March 05, 2007
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Green C F, Schaare P N, Bates C N (Nb now Deuchar C N) (1983) J Exp Botany 34:139, 226-229.

A Temperature Sensor for Temperature Integration in the Field

Abstract: A temperature sensor for use with millivolt type integrators was based on a temperature dependent current source. The design incorporated the facility to vary the base temperature above which integration took place. Response was linear giving an output sensitivity of 0.27 mV/deg C. The unit was powered by four 1.25 V nickel-cadmium cells.
Green C F and Deuchar C N (1985) J Exp Botany 36:165, 690-695

On Improved Tube Solarimeter Construction

Abstract: Due to inherent difficulties in the construction of tube solarimeters by 'conventional' techniques an alternative method is presented. Construction is based on the use of printed circuit boards, and further simplified mechanical procedures were employed. Response was linear over the range up to 600 W m exp-2 total solar radiation, at a mean calibration constatnt of 26 mV KW exp-1 m exp-2.
Chris N. Deuchar (1997)

A Boater's Guide to Boating

Published by Chris N. Deuchar on behalf of

the Historic Narrow Boat Owners Club

ISBN 0 9531512 0 4

This book is a revised, and much expanded, version of a series of articles which first appeared in the newsletter of the historic Narrow Boat Owners Club (hNBOC).

It is not a rewrite of that which appears in many other books on boating techniques, but seeks to carry on where they leave off. Nowhere before has anyone attempted to record, in any such detail, the special skills required to navigate the craft of our narrow canals, both historic and modern, along the waterways for which they were designed - and those for which they were not! Neither have so many hints and tips, derived directly from the ways and words of the former full time working boatmen, previously been collected in one place.

Wherever possible, the author has shown how old techniques can be used directly in the present day, and elsewhere how they can be adapted for present day use. The pattern of waterway usage has changed from a purely commercial operation to the multi-functional system that exists today. This has presented for the first time, potential areas of conflict between users, which the author addresses and suggests how techniques can be modified to retain their historic precedent whilst not being lost forever.

The author has more than thirty years of experience in handling boats, of all types from canoes to sailing craft, cruisers, narrow boats and barges, both for leisure and commerce, and in inland and coastal situations. The sum total of this wide range of practical and theoretical knowledge is accordingly deeply reflected in this publication.

It is above all a practical book, and should therefore not merely be read by those with a historic interest in past navigators - for there is much of historical interest here - but also by anyone who has ever steered a boat along our inland waterways or who intend to do so in the future. There is much, in particular, which will benefit those who boat single handedly.

It is a measure of the significance attributed to the original series of articles, that sections have (with the author's permission) been used more recently to provide instruction in boat handling for those involved in moving museum craft - such as the Friends of President and the Boat Museum at Ellesmere Port.

Micallef A, Deuchar C N, Colls J J (1998) Sci Total Environment 215, 209-216

Indoor and Outdoor Measurements of Vertical Concentration Profiles of Airborne Particulate Matter

Abstract: Vertical concentration profiles of various particle size ranges of airborne particulate matter were measured from ground level up to 3 m, in outdoor and indoor environments. Indoor measurements were carried out in an electronics workshop, while two outdoor environments were chosen: a street canyon cutting across a town and an open field situated in a semi-rural environment. The novel measurement technique employed in this experimental work, which can also be used to determine vertical concentration gradients of pollutants other than airborne particules in different environments , is given particular attention. Analyses of the collected data for the environments considered are presented and some conclusions and plausible explanations of the profiles are discussed. The workshop and street canyon environments exhibited larger concentrations and vertical concentration gradients as compared to the sports field. This indicates that people breathing at different heights are subjected to different concentrations of airborne particulate matter, which has implications for siting air pollution monitors intended for the protection of public health and estimation of human exposure. 
Alfred Micallef, Chris N. Deuchar, Jeremy J. Colls (1998) ISSN 1047-3289 J. Air & Waste Manage. Assoc. 48 , 757-762

Kinetic Sequential Sampling (KSS) System: An Automated Sampling System for Measuring Vertical Concentration Profiles of Airborne Particles

Abstract: An electronically controlled lift system carrying a real time particle monitor has been developed for sampling air sequentially, at different heights within the breathing zone. Data are automatically logged at the different receptor levels, for the determination of average vertical concentration profiles of airborne particulate matter. The system is easy to operate, portable and easily extended to different heights or modified for use with other types of monitors (eg., a portable CO analyser). For measuring airborne particle concentrations, a Grimm Dust Monitor 1.104/5 was used. The results of trial runs, which were carried out indoors and in a relatively open semi-rural area, are presented, and applications of the kinetic sequential sampling (KSS) system are discussed.
Alfred Micallef, Chris N. Deuchar, Jeremy J Colls (1998) Int. J. Occupational Safety and Ergonomics Vol. 4, No. 3, 333-346

A System for Measuring Vertical Concentration Profiles of Gaseous Pollutants, Using Carbon Dioxide as a Case Study

Abstract: An electronically-controlled sampling system, characterised by its organ pipe design, has been developed for sampling air sequentially, at different heights within the breathing zone. Data are automatically logged at the different receptor levels, for the determination of the average vertical concentration profile of gaseous pollutants. The system has been coupled to to a carbon dioxide monitor and used in a brief study of the spatial and temporal variation of indoor carbon dioxide concentration. The system can easily be extended for different heights or modified for use with other types of gas monitor. The results of a trial run, which was carried out in a coffee room, are presented, and applications of the Organ Pipe Sequential Sampling (OPSS) system are discussed.  
Deuchar CN, Colls JJ, Young SD (1999) Atmospheric Environment Vol 33 , No. 18 , 3077-3078

Hydrogen sulphide from vehicle exhaust: exposure dynamics.

New directions article on hydrogen sulphide emissions resulting from the introduction of catalytic converters on petrol engined vehicles and the need for further research.
Deuchar CN, Colls JJ, Young SD (2002) Integrated Waste Management and Pollution Control: Research, Policy and Practice.  Proceedings of Waste2002, 473-483. Warwick, UK.

A technique for the passive monitoring of hydrogen sulphide on landfill sites.

A new method for the passive monitoring of hydrogen sulphide (H2S) has been developed. The method is suitable for use wherever time-integrated concentrations are required, such as landfill sites, urban backgrounds and perimeter surveys. Cheap polycarbonate vials, which contain an absorbing solution, are fitted with gas permeable membranes to enable collection of H2S. These devices are referred to as 'diffusion reservoirs' (DRs) and may be fixed to wooden posts set out on the measurement site. On completion of the exposure period, the H2S concentration in the atmosphere is determined using a variant of the standard methylene blue method. The absorbing solution is stable for many weeks before exposure and, following exposure, the captured sulphide is stable for several days in the DRs. Sulphide has been captured over periods of up to 4 days. Hydrogen sulphide concentrations, in air, of between 1ppb and 250ppm (by volume) have been determined and compared with measurements made using commercial instrumentation. Results are presented of a spatial survey on a Nottinghamshire landfill site.

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