Hydrogen-oxygen electrolytic regenerative regenera fuel cells

Regenerative hydrogen-oxygen fuel, hydrogen permeability of asbestos matrix, design of multicell, and fabrication of single cell with separator plate for multicel

Hydrogen-oxygen electrolytic regenerative fuel cells quarterly report, 1 apr. - 30 jun. 1965

Electrolytically regenerative hydrogen-oxygen fuel cel

Hydrogen-oxygen electrolytic regenerative fuel cells Quarterly report, 1 Jan. - 31 Mar. 1966

Hydrogen-oxygen regenerative fuel cell testing to improve cycle life capability and to investigate modes of cell performance deterioratio

Hydrogen-oxygen electrolytic regenerative fuel cells, April 1 - May 1, 1966

Hydrogen-oxygen regenerative fuel cell tests to evaluate performance characteristics of matrix materials and electrode

Hydrogen-oxygen electrolytic regenerative fuel cells Quarterly report, 1 Oct. - 31 Dec. 1965

Single hydrogen-oxygen electrolyte fuel cell test with platinized porous nickel electrode

Pulsed Gas Chromatographic Separation Final Report

Feasibility of separating binary-gas mixtures based on pulsed-mode gas adsorption/desorptio

Electrolytically regenerative hydrogen-oxygen fuel cell Patent

Electrolytically regenerative hydrogen-oxygen fuel cell

Accuracy of user-adjusted axial length measurements by optical biometry in eyes having combined phacovitrectomy for macular-off rhegmatogenous retinal detachment

PURPOSE: To evaluate the accuracy of user-adjusted axial length measured by optical biometry (OB) for intraocular lens (IOL) power calculations in eyes having combined phacovitrectomy for macula-off rhegmatogenous retinal detachment (RRD). SETTING: Department of Ophthalmology, Calderdale Royal Hospital, Halifax, UK. DESIGN: Prospective Retrospective case series review of 22 consecutive eyes that underwent phacovitrectomy for macula-off RRD. METHODS: Axial lengths (ALs) were measured using OB with user adjustment to identify a posterior peak corresponding to the eye’s AL and ultrasound (US). These measurements were compared and analysed for accuracy to each other and the accurate indication of the eye’s AL. RESULTS: User-adjusted OB was similar to US and post-operative OB measurements. There was no statistically significant difference between the means of the AL measurements derived from user-adjusted OB and ultrasound AL (p=0.964). User-adjusted OB was not statistically significantly different to post-operative OB (p=0.242). Compared to postoperative OB, IOL power was within 0.5 Dioptre in 12 out of 13 cases (92%; 95% confidence interval (77.8%, 100.0%) for user-adjusted OB, and in only 10 out of 13 cases (77%; 95% confidence interval (54.0%, 99.8%) of US measurements. CONCLUSIONS: User-adjusted OB may be used as an alternative method for the measurement of AL in macula-off RRD for primary repair by combined phacovitrectomy. OB will, however, require assessment of agreement with US AL in cases where a posterior peak is not easily identifiable. We have also shown that user-adjusted OB may outperform US AL when calculating IOL power; however, a larger study may be needed to confirm thi

A freely accessible, evidence based, objective system of analysis of posterior capsular opacification ; Evidence for its validity and reliability

BACKGROUND: The aim of this study was to develop a system of computerised analysis of digital images of posterior capsule opacification (PCO) that is evidence based, objective and freely available. The paper will present evidence for the reliability and validity of the developed system. METHODS: The system of PCO analysis was developed considering current published evidence on visual significance of PCO and additional investigative analysis of PCO images. Details of the image processing and analysis steps are discussed and a final system that measures an entropy score weighted toward proximity to central areas is described. In order to assess validity, the systems ability to measure PCO progression is assessed along with the visual significance of its final computerised scores. Reliability of the system is also assessed. RESULTS: The final system runs successfully and is simple to use. Analyses of PCO by the system show an ability to detect early progression of PCO as well as detection of visually significant PCO. Images with no clinical PCO produce very low scores in the analysis. Reliability of the system of analysis is shown to be satisfactory. CONCLUSION: This paper presents a system of PCO analysis that is evidence based, objective and clinically useful. Substantial evidence is provided for its validity and reliability