Research and Technology 1995

This report selectively summarizes the NASA Lewis Research Center's research and technology accomplishments for fiscal year 1995. It comprises over 150 short articles submitted by the staff members of the technical directorates. The report is organized into six major sections: aeronautics, aerospace technology, space flight systems, engineering support, Lewis Research Academy, and technology transfer. A table of contents, an author index, and a list of NASA Headquarters program offices have been included to assist the reader in finding articles of special interest. This report is not intended to be a comprehensive summary of all research and technology work done over the past fiscal year. Most of the work is reported in Lewis-published technical reports, journal articles, and presentations prepared by Lewis staff members and contractors (for abstracts of these Lewis-authored reports, visit the Lewis Technical Report Server (LETRS) on the World Wide Web-http://letrs.lerc.nasa.gov/LeTRS/). In addition, university grants have enabled faculty members and graduate students to engage in sponsored research that is reported at technical meetings or in journal articles. For each article in this report, a Lewis contact person has been identified, and where possible, reference documents are listed so that additional information can be easily obtained. The diversity of topics attests to the breadth of research and technology being pursued and to the skill mix of the staff that makes it possible. For more information about Lewis' research, visit us on the World Wide web-http://www.lerc.nasa.gov

Practical issues arising from the use of telemedicine applications: An evaluation of equipment used for colour imaging in teledermatology, automated weight monitoring and patient-operated 12-lead ECG recording in arrhythmia.

Three telemedicine applications which depend on relatively simple telephone technology to transfer data in the care of patients managing chronic conditions at home are investigated in order to evaluate their application from the users’ perspectives. Part one provides an evaluation of four mobile cameraphones, of varying quality, such as those commonly used to photograph patients for remote diagnosis. The cameraphones are compared with a digital camera, two videophones and an ISDN6 conferencing facility, in their ability to replicate colour and shape. The effects of uploading the images to a laptop computer and of transferring an image by MSN messaging are also evaluated. Part two provides an evaluation of electronic weighing scales connected via a wireless gateway to a landline telephone for the purpose of remote weight monitoring in patients with chronic heart failure. Self-reported experiences of patients, carers and specialist nurses are explored and outcomes compared with previously published opinion. The idiosyncratic nature of health care is highlighted as a main factor in the success or failure of the system. The third application is a patient-operated 12-lead ECG unit which transmits data via a home landline to a call centre, where it is displayed as an ECG trace and a report is given by specialist clinicians. Self-reported experiences of patients with arrhythmia reveal systematic phenomena which hinder the effectiveness of the device and which are related to human, not technological, failings. ECG traces obtained by unskilled lay persons on paediatric patients are compared with the ECG traces obtained by skilled and experienced paediatric nurses on the same patients. The results show that in the case of the cameraphones the technology is less accurate than normally assumed. In the case of the weight monitoring and ECG equipment however it is more usually human factors which cause a disappointing outcome