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Biomedical subjects

P de Chazal

Publications and source records attributed to P de Chazal.

5 recordsLinked to original sources
PubMed2006

Running effective meetings: a primer for doctors.

This paper uses a series of exercises and practical examples to assist individuals and groups of doctors in training to gain skills in a critical area of management: conducting and participating in effective meetings. Through this paper, readers will be shown how to recognise and manage situations as they occur in meetings to work towards appropriate outcomes. By understanding the elements of conducting a meeting from preparation through to follow up, doctors will be able to conduct and participate more effectively in meetings that arise in their workplaces.

Communication↗
PubMed2005

Automated processing of shoeprint images based on the Fourier transform for use in forensic science.

The development of a system for automatically sorting a database of shoeprint images based on the outsole pattern in response to a reference shoeprint image is presented. The database images are sorted so that those from the same pattern group as the reference shoeprint are likely to be at the start of the list. A database of 476 complete shoeprint images belonging to 140 pattern groups was established with each group containing two or more examples. A panel of human observers performed the grouping of the images into pattern categories. Tests of the system using the database showed that the first-ranked database image belongs to the same pattern category as the reference image 65 percent of the time and that a correct match appears within the first 5 percent of the sorted images 87 percent of the time. The system has translational and rotational invariance so that the spatial positioning of the reference shoeprint images does not have to correspond with the spatial positioning of the shoeprint images of the database. The performance of the system for matching partial-prints was also determined.

Algorithms↗
PubMed2004

Can an information booklet on an ethnic minority increase the knowledge base of junior doctors?

Many doctors encounter people of different cultural backgrounds for the first time as patients. In Leicester a significant proportion of the area's population comes from a Gujarati and Hindu background. In an attempt to better inform junior doctors about the views and beliefs of their patients, a group of clinicians and administrators developed an information booklet about the beliefs and practices of people from this community. The impact of this booklet on a group of 54 junior doctors' knowledge was investigated over a period of one month. Such an information booklet was found to significantly increase awareness of the cultural background of patients from a minority community and this knowledge was maintained for at least one month after distribution. The study did not investigate impact on attitudes.

Clinical Competence↗
PubMed2002

Systematic comparison of different algorithms for apnoea detection based on electrocardiogram recordings.

Sleep apnoea is a common disorder that is usually diagnosed through expensive studies conducted in sleep laboratories. Sleep apnoea is accompanied by a characteristic cyclic variation in heart rate or other changes in the waveform of the electrocardiogram (ECG). If sleep apnoea could be diagnosed using only the ECG, it could be possible to diagnose sleep apnoea automatically and inexpensively from ECG recordings acquired in the patient's home. This study had two parts. The first was to assess the ability of an overnight ECG recording to distinguish between patients with and without apnoea. The second was to assess whether the ECG could detect apnoea during each minute of the recording. An expert, who used additional physiological signals, assessed each of the recordings for apnoea. Research groups were invited to access data via the world-wide web and submit algorithm results to an international challenge linked to a conference. A training set of 35 recordings was made available for algorithm development, and results from a test set of 35 different recordings were made available for independent scoring. Thirteen algorithms were compared. The best algorithms made use of frequency-domain features to estimate changes in heart rate and the effect of respiration on the ECG waveform. Four of these algorithms achieved perfect scores of 100% in the first part of the study, and two achieved an accuracy of over 90% in the second part of the study.

Algorithms↗